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JP2017127530

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2017127530
Abstract: The present invention provides an ultrasonic probe and an ultrasonic diagnostic
apparatus capable of changing and adjusting an imaging range with a simpler configuration
without lowering usability. A transmission / reception unit includes a plurality of transmission /
reception units, an acoustic lens, and a switch unit that switches operation / non-operation of the
transmission / reception unit, and the transmission / reception unit is a second transmission /
reception unit 212 located at the center. The first transmitting / receiving unit 211 and the third
transmitting / receiving unit 213 are arranged symmetrically on both sides of the acoustic lens
22. The acoustic lens 22 includes the first transmitting / receiving unit, the second transmitting /
receiving unit, and the third transmitting / receiving unit. The first lens unit 22a, the second lens
unit 22b, and the third lens unit 22c corresponding to each other, and the switch unit performs
the second transmission / reception unit alone or when the traveling direction of the ultrasonic
wave is straight. While operating all of the first transmission / reception unit, the second
transmission / reception unit, and the third transmission / reception unit, operate the first
transmission / reception unit or the third transmission / reception unit when deflecting the
traveling direction of the ultrasonic wave, The first lens portion and the third lens portion have
an aspheric shape. To. [Selected figure] Figure 7
Ultrasonic probe and ultrasonic diagnostic apparatus
[0001]
The present invention relates to an ultrasound probe and an ultrasound diagnostic apparatus.
[0002]
03-05-2019
1
Conventionally, there is an ultrasonic diagnostic apparatus that inspects the internal structure of
a subject by irradiating ultrasound into the inside of the subject, receiving its reflected wave
(echo), and performing predetermined signal data processing.
Such ultrasonic diagnostic apparatuses are widely used in various applications such as medical
examinations and treatments.
[0003]
The ultrasonic diagnostic apparatus not only processes the data of the acquired reflected wave to
display an image, but also, for example, collects a sample of a specific site (target) in the subject,
discharges water, etc. Or, when injecting or indwelling a drug or marker at a specific site, when
the puncture needle is directed toward the target position while observing the position of the
puncture needle and the target used for these. Ultrasound images are used. In addition, for
example, when inserting a catheter into a specific site such as a bile duct, an ultrasound image is
also used in the case of visualizing the position of the catheter and the specific site. The use of
such an ultrasound image enables quick, reliable and easy treatment of the target in the subject.
[0004]
In ultrasonic diagnostic apparatuses, transducers for transmitting and receiving ultrasonic waves
are arrayed, and many apparatuses that perform imaging while scanning positions (in particular,
electronic scanning) in positions where ultrasonic waves are transmitted and received are used. .
For example, the puncture needle is pierced along the scanning direction, and is continuously
positioned within the imageable range from the position of penetration into the subject to the
arrival at the target.
[0005]
However, the puncture needle may not always be accurately directed in the first insertion
direction or the puncture needle may be curved depending on the internal state of the subject,
the structure, the tip shape of the puncture needle, and the like. As a result, there is a problem
that the tip of the puncture needle may be out of the range in which imaging is possible in the
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2
width direction orthogonal to the scanning direction and imaging may not be performed.
[0006]
On the other hand, Patent Document 1 provides a delay circuit for delaying the operation timings
of a plurality of transducers arranged in the width direction, and switching the magnitude
relation of the delay amounts of the plurality of transducers to switch ultrasonic waves. There is
disclosed a technique for deflecting the traveling direction to perform imaging outside the
original ultrasonic transmission / reception width.
[0007]
JP 2000-139926 A
[0008]
However, the deflection control circuit including such a delay circuit for adjusting the imaging
range is large in size, and the operation is accompanied by heat generation, so there is a problem
of reducing the usability of the ultrasonic probe (probe). .
[0009]
An object of the present invention is to provide an ultrasonic probe and an ultrasonic diagnostic
apparatus capable of adjusting an imaging range with a simpler configuration and without
reducing usability.
[0010]
An ultrasonic probe according to the present invention is arranged along a predetermined first
direction, and transmits and receives ultrasonic waves to a subject and receives reflected waves
therefrom, and the transmission and reception units transmit and receive the ultrasonic waves.
An acoustic lens for focusing the focused ultrasound beam in the first direction, and a switch unit
for switching between operation and non-operation of the transmission / reception unit, the
transmission / reception unit being a second transmission / reception unit located at the center,
It has a first transmission / reception unit and a third transmission / reception unit arranged
symmetrically on both sides of a second transmission / reception unit, and the acoustic lens
comprises the first transmission / reception unit, the second transmission / reception unit, and
the The first transmission / reception unit has a first lens unit, a second lens unit, and a third lens
unit corresponding to each of the transmission / reception units, and the switch unit performs
the second transmission / reception unit when the traveling direction of the ultrasonic wave is
straight. , Or the first transmission / reception unit, the second transmission The first lens unit
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and the third transmission and reception unit are operated when the traveling direction of the
ultrasonic wave is deflected while operating all of the reception unit and the third transmission
and reception unit. The third lens portion has an aspheric shape.
[0011]
Further, an ultrasonic probe according to the present invention is arranged along a
predetermined first direction, a plurality of transmitting / receiving units for transmitting
ultrasonic waves to an object and receiving reflected waves, and the transmitting / receiving
units An acoustic lens for focusing the ultrasonic beam transmitted and received by the first
direction in the first direction, and a switch unit for switching between operation and nonoperation of the transmission / reception unit, wherein the transmission / reception unit is a
second transmission / reception unit located at the center A first transmission / reception unit
and a third transmission / reception unit are provided symmetrically on both sides of the second
transmission / reception unit, and the switch unit includes the first transmission / reception unit,
the second transmission / reception unit, and The first switch unit, the second switch unit, and
the third switch unit corresponding to each of the third transmitting and receiving units, the
second switch unit includes a switching element and a switching element in parallel Have an
electrical circuit to be connected Via said electric circuit by a switching element or without
passing through the electrical circuit for operating said second transceiver.
[0012]
Furthermore, the ultrasonic probe according to the present invention is arranged along a
predetermined first direction, and includes a plurality of transmitting and receiving units that
transmit ultrasonic waves to the object and receive their reflected waves, and the transmitting
and receiving units An acoustic lens for focusing the ultrasonic beam transmitted and received by
the first direction in the first direction, and a switch unit for switching between operation and
non-operation of the transmission / reception unit, the transmission / reception unit being a
second transmission / reception unit A first transmitting / receiving unit and a third transmitting
/ receiving unit symmetrically arranged on both sides of the second transmitting / receiving unit,
wherein the second transmitting / receiving unit is divided into a first segment and a The switch
unit has two sections, the switch section has switching elements corresponding to the first
section and the second section, and the switch section is configured to move the ultrasonic wave
in a straight direction. The second transmission / reception unit alone or the first transmission /
reception unit When driving the whole of the second transmission / reception unit and the third
transmission / reception unit while deflecting the traveling direction of the ultrasonic wave, the
first section or the first of the second transmission / reception units by the switching element
Drive one of the second divisions.
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[0013]
Furthermore, the ultrasound diagnostic apparatus according to the present invention includes an
ultrasound probe and a transmission / reception processing unit that performs an ultrasound
transmission / reception operation to the ultrasound probe.
[0014]
According to the present invention, it is possible to adjust the imaging range with a simpler
configuration without lowering the usability.
[0015]
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the
ultrasound diagnosing device of 1st Embodiment of this invention.
It is a block diagram which shows an example of an internal structure of an ultrasound
diagnosing device.
It is a figure which shows the example of the transmission-and-reception arrangement | sequence
of the short axis direction in an ultrasound probe.
It is a figure which shows the relationship between the transmission / reception part of the
center part used, and the shape of an ultrasonic beam.
It is a figure which shows the relationship between all the transmission / reception parts used,
and the shape of an ultrasonic beam.
FIG. 7 shows the shape of the combined ultrasound beam.
It is a figure which shows the relationship between the transmission / reception part of the
center part used, and the shape of an ultrasonic beam.
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5
It is a figure which shows the relationship between all the transmission / reception parts used,
and the shape of an ultrasonic beam.
FIG. 7 shows the shape of the combined ultrasound beam.
It is a figure which shows the cross-section in alignment with the short-axis direction of the
transmission-and-reception sequence in the ultrasonic probe concerning a comparative example.
It is a figure which shows the cross-section in alignment with the short-axis direction of the
transmission-and-reception arrangement | sequence in an ultrasound probe. It is a figure which
shows the relationship between the transmission / reception part of the center part used, and the
shape of an ultrasonic beam. It is a figure which shows the relationship between all the
transmission / reception parts used, and the shape of an ultrasonic beam. FIG. 7 shows the shape
of the combined ultrasound beam. It is a figure showing the ultrasonic probe concerning a
comparative example. It is a figure which shows the relationship between the used transmission /
reception part and the shape of an ultrasonic beam. It is a figure which shows the ultrasound
probe concerning 2nd Embodiment. It is a figure which shows an example of a structure of an
electric circuit. It is a figure which shows an example of a structure of an electric circuit. It is a
figure which shows an example of a structure of an electric circuit. It is a figure which shows the
ultrasound probe concerning 3rd Embodiment. It is a figure which shows the relationship
between the transmission / reception part used and the advancing direction of an ultrasonic
wave. It is a figure which shows the relationship between the transmission / reception part used
and the advancing direction of an ultrasonic wave.
[0016]
Hereinafter, embodiments of the present invention will be described based on the drawings. First
Embodiment FIG. 1 is a diagram showing an entire configuration of an ultrasonic diagnostic
apparatus U according to a first embodiment. FIG. 2 is a block diagram showing an internal
configuration of the ultrasonic diagnostic apparatus U.
[0017]
As shown in FIGS. 1 and 2, the ultrasonic diagnostic apparatus U comprises an ultrasonic
diagnostic apparatus body 1 and an ultrasonic probe 2 connected to the ultrasonic diagnostic
apparatus body 1 via a cable 5 (ultrasonic wave It comprises a probe), a puncture needle 3, and
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an attachment portion 4 attached to the ultrasonic probe 2. Here, the ultrasonic probe 2
mentioned as an example transmits and receives ultrasonic waves in all of the three transmitting
/ receiving units 210 arranged in the minor axis direction and all of the three transmitting /
receiving units 210. It is called a 1.25D probe provided with a switch unit 23 for switching as a
drive transmission / reception unit to be performed. In addition, an example of using an
ultrasound image will be described in the case of performing the use of an ultrasound image
while visually observing the puncture needle 3 and the position of a target in a subject when
inserting the puncture needle 3. The invention is not limited to this example. Here, the
transmitting and receiving unit 210 includes one or more vibrators 21A (see FIG. 3). The
transducers 21A included in each of the first, second, and third transmission / reception units
211, 212, and 213 arranged in the minor axis direction simultaneously transmit and receive
ultrasonic waves. Furthermore, “3”, which is the number of transmission / reception units 210,
divides the plurality of transducers 21A arranged in the minor axis direction into three, the
central portion in the minor axis direction and the two side portions located on both sides
thereof. Say the number of
[0018]
Here, the puncture needle 3 has a hollow long needle shape, and is pierced into the subject at an
angle determined by the setting of the attachment portion 4. The puncture needle 3 can be
retrofitted to one having an appropriate thickness, length, and tip shape according to the type
and amount of a target (sample) to be collected or a drug to be injected.
[0019]
The attachment portion 4 holds the puncture needle 3 in a set direction (direction). The attaching
portion 4 is attached to the side of the ultrasonic probe 2 and can change and set the direction of
the puncture needle 3 according to the insertion angle of the puncture needle 3 with respect to
the subject. The attachment unit 4 can not only move the puncture needle 3 in the insertion
direction, but can insert the puncture needle 3 while rotating (spin) the puncture needle 3 with
respect to the central axis of the puncture needle 3. Note that, instead of the attachment portion
4, a guide portion may be directly provided to the ultrasound probe 2 to hold the puncture
needle 3 in the insertion direction.
[0020]
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7
The ultrasonic diagnostic apparatus main body 1 is provided with an operation input unit 18 and
an output display unit 19. Further, as shown in FIG. 2, in addition to the above, the ultrasonic
diagnostic apparatus main body 1 further includes a control unit 11, a transmission drive unit
12, a reception processing unit 13, a transmission / reception switching unit 14, and an image
generation unit 15. , The image processing unit 16 and the like. The control unit 11 of the
ultrasonic diagnostic apparatus main body 1 outputs a drive signal to the ultrasonic probe 2 to
output an ultrasonic wave based on an external input operation to an input device such as a
keyboard or a mouse of the operation input unit 18 Also, a reception signal related to ultrasonic
wave reception is acquired from the ultrasonic probe 2 and various processing is performed, and
the result etc. are displayed on the display screen of the output display unit 19 as necessary.
[0021]
The control unit 11 includes a central processing unit (CPU), a hard disk drive (HDD), a random
access memory (RAM), and the like. The CPU reads out various programs stored in the HDD,
loads them into the RAM, and generally controls the operation of each part of the ultrasonic
diagnostic apparatus U according to the program. The HDD stores a control program and various
processing programs for operating the ultrasonic diagnostic apparatus U, various setting data,
and the like. These programs and setting data may be stored in an auxiliary storage device using
a non-volatile memory such as a flash memory including a solid state drive (SSD) other than an
HDD, for example, in a readable / writable manner. The RAM is volatile memory such as SRAM or
DRAM, provides a working memory space to the CPU, and stores temporary data.
[0022]
The control unit 11 includes a switching control unit 111. Based on the positional information of
the puncture needle 3 identified in the image processing unit 16, the switching control unit 111
biases the tip of the puncture needle 3 in the direction orthogonal to the scanning direction by
the transmission / reception unit array 21 and from within the imaging range When it deviates,
setting is made to deflect the traveling direction of the ultrasonic wave by the first, second and
third transmission / reception units 211, 212 and 213 (refer to FIG. 3) arranged in the short axis
direction, Output control signal. The operation of the switching control unit 111 may be executed
as software using a CPU or a RAM of the control unit 11.
[0023]
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8
The transmission drive unit 12 outputs a pulse signal to be supplied to the ultrasound probe 2 in
accordance with a control signal input from the control unit 11, and causes the ultrasound probe
2 to emit an ultrasound wave. The transmission drive unit 12 includes, for example, a clock
generation circuit, a pulse width setting unit, a pulse generation circuit, and a delay circuit. The
clock generation circuit is a circuit that generates a clock signal that determines the transmission
timing and transmission frequency of the pulse signal. The pulse width setting unit sets the
waveform (shape) of the transmission pulse to be output from the pulse generation circuit, the
voltage amplitude, and the pulse width. The pulse generation circuit generates a transmission
pulse based on the setting of the pulse width setting unit, and outputs the transmission pulse to a
different wiring path for each transmission / reception unit 210 of the ultrasonic probe 2. The
delay circuit counts clock signals output from the clock generation circuit, and when the set
delay time has elapsed, causes the pulse width generation circuit to generate transmission pulses
and output them to the respective wiring paths.
[0024]
The reception processing unit 13 is a circuit that acquires a reception signal input from the
ultrasound probe 2 according to the control of the control unit 11. The reception processing unit
13 includes, for example, an amplifier, an A / D conversion circuit, and a phasing addition circuit.
The amplifier is a circuit that amplifies the received signal corresponding to the ultrasonic wave
received by each of the transmitting and receiving units 210 of the ultrasonic probe 2 at a
predetermined amplification factor set in advance. The A / D conversion circuit is a circuit that
converts the amplified reception signal into digital data at a predetermined sampling frequency.
The phasing addition circuit gives a delay time to the A / D converted received signal for each
wiring path corresponding to each of the transmitting and receiving units 210, adjusts the time
phase, adds them (phasing addition), and generates a sound. It is a circuit that generates line
data.
[0025]
The transmission / reception switching unit 14 transmits a drive signal from the transmission
drive unit 12 to the transmission / reception unit 210 when emitting (transmitting) an ultrasonic
wave from the transmission / reception unit 210 based on the control of the control unit 11.
When the signal related to the ultrasonic wave is acquired, the switching operation for outputting
the reception signal to the reception processing unit 13 is performed. The transmission drive unit
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9
12, the reception processing unit 13, and the transmission / reception switching unit 14
constitute a transmission / reception processing unit.
[0026]
The image generation unit 15 generates a diagnostic image based on the reception data of
ultrasonic waves. The image generation unit 15 detects (envelope detection) sound ray data input
from the reception processing unit 13 to obtain a signal, and performs logarithmic amplification,
filtering (for example, low-pass transmission, smoothing, etc.) as necessary. ) And emphasizing
processing. The image generation unit 15, as one of the diagnostic images, has a luminance
signal according to the signal intensity, a transmission direction of the signal (depth direction of
the object) and a scanning direction of the ultrasonic wave transmitted by the ultrasonic probe 2.
Each frame image (diagnostic image) data according to the B-mode display representing a twodimensional structure in a cross section including the At this time, the image generation unit 15
can perform adjustment of the dynamic range related to display, gamma correction, and the like.
The image generation unit 15 can be configured to include a dedicated CPU and a RAM used for
generating these images. Alternatively, in the image generation unit 15, a dedicated hardware
configuration related to image generation is formed on a substrate (ASIC (Application-Specific
Integrated Circuit) or the like), or formed by an FPGA (Field Programmable Gate Array). May be
Alternatively, the image generation unit 15 may be configured to perform processing related to
image generation by the CPU and the RAM of the control unit 11.
[0027]
The image processing unit 16 includes a storage unit 161, a puncture needle identification unit
162, and the like. The storage unit 161 stores diagnostic image data (frame image data)
processed by the image generation unit 15 and used for real-time display or display according to
the predetermined number of the latest frames in frame units. The storage unit 161 is, for
example, a volatile memory such as a dynamic random access memory (DRAM). Alternatively, the
storage unit 161 may be various non-volatile memories that can be rewritten at high speed. The
diagnostic image data stored in the storage unit 161 is read according to the control of the
control unit 11, transmitted to the output display unit 19, or output to the outside of the
ultrasonic diagnostic apparatus U via the communication unit (not shown). To At this time, if the
display mode of the output display unit 19 is a television system, a DSC (Digital Signal Converter)
is provided between the storage unit 161 and the output display unit 19 and the scan format is
converted and then output. It should be done.
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[0028]
The puncture needle identification unit 162 generates image data for identifying the position of
the puncture needle 3, performs appropriate processing on the image data, and identifies the
position of the tip portion of the puncture needle 3.
[0029]
As a method of identifying the position of the puncture needle 3, for example, the tip (tip portion)
of the moving puncture needle 3 is detected by taking the difference or correlation of a plurality
of diagnostic images generated at predetermined time intervals. You can do it.
[0030]
The operation input unit 18 includes a push button switch, a keyboard, a mouse, or a trackball,
or a combination of these, converts the user's input operation into an operation signal, and inputs
the operation signal to the ultrasonic diagnostic apparatus main body 1.
[0031]
The output display unit 19 is a display using any of various display methods such as a liquid
crystal display (LCD), an organic electro-luminescent (EL) display, an inorganic EL display, a
plasma display, and a cathode ray tube (CRT) display. It has a screen and its drive unit.
The output display unit 19 generates a drive signal of a display screen (each display pixel)
according to a control signal output from the CPU or image data generated by the image
processing unit 16, and a menu related to ultrasonic diagnosis on the display screen. , Status, and
display of measurement data based on the received ultrasound.
In addition, the output display unit 19 may be configured to separately include an LED lamp or
the like to display whether or not the power is turned on.
[0032]
The operation input unit 18 and the output display unit 19 may be integrally provided in the
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11
casing of the ultrasonic diagnostic apparatus main body 1, or may be an RGB cable, a USB cable,
or an HDMI cable (registered trademark: It may be externally attached via HDMI or the like.
Further, as long as the ultrasonic diagnostic apparatus main body 1 is provided with an operation
input terminal and a display output terminal, peripheral devices for conventional operation and
display may be connected to these terminals for use.
[0033]
The ultrasound probe 2 oscillates an ultrasonic wave (here, about 1 to 30 MHz) and emits it to a
subject such as a living body, and a reflected wave (a reflected wave reflected by the subject
among the emitted ultrasonic waves) Functions as an acoustic sensor that receives echoes and
converts them into electrical signals. The ultrasound probe 2 includes a transmitting / receiving
unit array 21 which is an array of three transmitting / receiving units 210 for transmitting /
receiving ultrasonic waves, a plurality of switch units 23 corresponding to the transmitting /
receiving units 210, a switching setting unit 24, and operations. The input unit 28 and the like
are provided. Here, although the ultrasonic probe 2 emits an ultrasonic wave from the outside
(surface) to the inside of the subject and receives the reflected wave, as the ultrasonic probe 2, a
digestive tract or Also included are those having a size and a shape which are used by being
inserted into a body cavity or the like such as a blood vessel. The user operates the ultrasonic
diagnostic apparatus U by bringing the object in contact with the ultrasonic wave transmitting /
receiving surface of the ultrasonic probe 2, ie, the surface in the direction in which the ultrasonic
wave is emitted from the transmitting / receiving unit array 21 Make a diagnosis.
[0034]
The transmission / reception unit array 21 is an arrangement of a plurality of transmission /
reception units 210 each including a piezoelectric element having a piezoelectric body and
electrodes provided at both ends at which charges appear due to deformation (extension or
contraction) thereof.
[0035]
FIG. 3 is a view showing an example of the transmission / reception unit array 21 in the
ultrasound probe 2 of the present embodiment.
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Here, a direction perpendicular to the scanning direction is referred to as a short axis direction
(corresponding to the “first direction” of the present invention) or a width direction, and a
scanning direction is referred to as a long axis direction. The direction orthogonal to the direction
may be referred to as the depth direction. In addition, the distance in the depth direction from
the ultrasound transmitting / receiving surface may be referred to as “depth”, and the distance
from the ultrasound transmitting / receiving surface to the focal position may be referred to as
“focal distance”. The term "focus position" hereinafter refers to a position at which the acoustic
lens 22 focuses the ultrasonic beam in the short axis direction.
[0036]
In the ultrasonic diagnostic apparatus U of the present embodiment, the transmitting / receiving
unit array 21 has a two-dimensional surface (not a plane) defined by a predetermined direction
(scanning direction) and a width direction (first direction) orthogonal to the scanning direction.
And a plurality of transmitting / receiving units 210 arranged in a matrix. Usually, the number of
transmission / reception units 210 in the scanning direction is larger than the number of
transmission / reception units 210 in the width direction. Therefore, the scanning direction is the
long axis direction and the width direction is the short axis direction. Here, first, second and third
transmission / reception units 211, 212 and 213 are arranged in order in the short axis
direction. Hereinafter, the set of the first, second, and third transmission / reception units 211,
212, and 213 in the short axis direction is also referred to as a transmission / reception unit set.
[0037]
The transmission / reception unit 210 to which the voltage pulse is supplied is supplied to the
plurality of transmission / reception units 210 in order (including the case where there is a
partial overlap) of a predetermined number of transmission / reception units in the scanning
direction. Each piezoelectric body is deformed (stretched) according to the electric field
generated in the piezoelectric body, and an ultrasonic wave is transmitted. The transmitted
ultrasonic waves depend on the position and direction of the transmitting / receiving unit 210
included in the predetermined number of transmitting / receiving unit sets supplied with the
voltage pulse, the focusing direction of the transmitted ultrasonic waves, and the magnitude of
the deviation (delay) of the timing. Are emitted at the same position and direction. In addition,
when ultrasonic waves of a predetermined frequency band enter the transmitting and receiving
unit 210, the thickness of the piezoelectric body fluctuates (oscillates) due to the sound pressure,
and charges corresponding to the fluctuation amount are generated, which corresponds to the
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charge amount It is converted to an electrical signal and output.
[0038]
The switch unit 23 is provided corresponding to the transmission / reception unit 210. First,
second and third switch parts 231, 232 and 233 are provided as the switch parts 23
corresponding to the first, second and third transmission / reception parts 211, 212 and 213,
respectively. The switch unit 23 switches the operation and non-operation of the transmitting
and receiving unit 210 based on the switch switching signal from the switching setting unit 24.
Here, “the operation of the transmission / reception unit 210” refers to an operation when the
transmission / reception unit 210 is selected as a drive transmission / reception unit. On the
other hand, "non-operation of transmission / reception unit 210" means an operation when
transmission / reception unit 210 is not selected as a drive transmission / reception unit, and
transmission / reception unit 210 is in the second operation state (second embodiment described
later). Including when it comes to
[0039]
The switching setting unit 24 selects the drive transmitting / receiving unit that transmits /
receives the ultrasonic wave from the plurality of transmitting / receiving units 210, thereby
deflecting the traveling direction of the ultrasonic wave, and setting the focal position of the
ultrasonic beam to a shallow portion. Switch to the deep part. In the ultrasonic diagnostic
apparatus U of the present embodiment, the traveling direction of the ultrasonic wave can be set
for each set of transmitting and receiving units as described later.
[0040]
The operation input unit 28 receives an input operation of the operator and performs an
operation according to the content of the operation. For example, the setting of the switch setting
unit 24 can be manually changed according to the operation on the operation input unit 28.
[0041]
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In a general 1.25D probe, the transmitting and receiving unit 210 is divided in the short axis
direction, and the width (short axis opening width) of the transmitting and receiving unit 210
used for transmission and reception is narrowed, whereby an ultrasonic beam is generated at a
relatively shallow portion. The ultrasound beam is focused at a relatively deep position by
focusing the beam width and widening the transmitting and receiving unit 210 used for
transmission and reception. The point that it is possible to focus the ultrasonic beam on such
shallow places and deep places is advantageous as compared with the ultrasonic probe 2 in
which the transmitting and receiving unit 210 is not divided in the short axis direction. In a
general 1.25D probe, when the minor axis aperture width is narrowed, the aperture center is
aligned with the minor axis width center. The shape of the ultrasonic beam when the minor axis
aperture width is narrowed shown in FIG. 4A, the beam shape when the minor axis aperture
width is enlarged shown in FIG. 4B, the preferred depth according to the minor axis aperture
width (square dotted line To construct an image as one ultrasonic beam shown in FIG. 4C.
[0042]
As for the ratio (short axis division ratio) of the minor axis aperture in a general 1.25D probe, a
division ratio of about 1: 2: 1 is preferable for beam forming. The “minor axis division ratio”
does not necessarily mean an accurate numerical value, and includes the result (approximate
value) when the actual measured value is rounded to an integer value. In this embodiment, when
the short axis opening is narrowed and used in addition to the general short axis opening
switched 1.25D, the center of the opening does not coincide with the center of the short axis
width. It deflects the sound beam. In the case of using the beam for deflection, the minor axis
division ratio is, for example, 1: 1 in the case of equal width (including approximately equal
width) in the case of three division, beam deflection angle, beam focusing It is advantageous in
terms of sex.
[0043]
In the present invention, the same probe is used for the 1.25D probe divided by the minor axis
division ratio: 1) how to switch the general short-axis aperture width, and 2) how to deflect the
ultrasonic beam It is a thing.
[0044]
However, at a minor axis split ratio (1: 1: 1) suitable for deflected beams, as shown in FIGS. 5A5C, in the case of a wide minor axis aperture, the ultrasonic beam is focused only at a certain
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depth position. , Spread further in the depths.
As a result, the focal depth (the length of the portion where the beam is narrowed) becomes
short, and uniform beam formation can not be obtained. The lenses corresponding to the
respective transmitting / receiving units 210 divided by the minor axis division ratio 1: 1: 1 are
all spherical.
[0045]
FIG. 6 shows an ultrasonic probe according to a comparative example, in which each transmitting
/ receiving unit 210 divided by the minor axis division ratio (1: 1: 1) and a surface on which
ultrasonic waves are transmitted / received in lenses corresponding thereto The whole surface of
is an example of a spherical surface. Here, the transmission / reception unit 210 located at the
center in the short axis direction is referred to as a second transmission / reception unit 212, and
the transmission / reception units 210 symmetrically arranged on both sides of the second
transmission / reception unit 212 are referred to as first and third The transmitter / receivers
211 and 213 of FIG. "Symmetric" means that the position and the size are symmetrical.
[0046]
The ultrasonic probe shown in FIG. 6 is a minor axis division ratio that is advantageous for
deflecting a beam, but because it is a spherical lens, a uniform beam can not be obtained from
shallow to deep portions. This is not in line with the object of the present invention. In this
embodiment, the acoustic lens 22 is configured as follows as a method of uniformly and finely
focusing the ultrasonic beam from the shallow portion to the deep portion.
[0047]
Next, a configuration suitable for changing the focal position of the ultrasonic wave in the
ultrasonic diagnostic apparatus U will be described.
[0048]
FIG. 7 is a view showing a cross-sectional structure along the minor axis direction of the
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transmission / reception unit array 21 in the ultrasound probe 2.
Here, a cross sectional structure at a cross section AA of FIG. 3 is shown. In FIG. 7, the switch unit
23 provided corresponding to the first, second, and third transmission / reception units 211,
212, and 213 is omitted.
[0049]
As shown in FIG. 7, in this ultrasound probe 2, the acoustic lens 22 having a curvature common
to the first, second, and third transmitting and receiving units 211, 212, and 213 arranged in the
minor axis direction The direction of travel of the ultrasonic waves by the first, second and third
transmission / reception units 211, 212 and 213 is refracted, and the width of the ultrasonic
beam is focused in the minor axis direction. Usually, silicon or the like is used for the acoustic
lens 22. Alternatively, other materials may be selected as appropriate depending on the desired
ultrasound refractive index.
[0050]
The second lens portion 22 b located at the center in the minor axis direction of the acoustic lens
22 has a spherical shape having a predetermined curvature.
[0051]
In addition, the first and third lens portions 22a and 22c located on both sides of the second lens
portion 22b have an aspheric shape.
An "aspheric surface" refers to a surface that is not a spherical surface, and includes a plane with
a curvature of zero. The shapes of the first and third lens portions 22a and 22c are not limited to
this, and various shapes of aspheric surfaces can be considered. For example, in the first and
third lens portions 22a and 22c, the shape of the aspheric surface is such that the focal position
is deeper toward the end opposite to the end on the second lens portion 22b. This allows the
ultrasound beam to be narrowed uniformly in the deep part. As described above, even when the
first, second, and third transmission / reception units 211, 212, and 213 are selected as drive
transmission / reception units (when the minor axis width is "3"), the focal position can be made
deeper. The ultrasound beam can be focused uniformly and thinly in the deep part. Here, the
03-05-2019
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entire surface of the first and third lens portions 22a and 22c on which the ultrasonic waves are
transmitted and received is aspherical. By making the entire surface aspheric, the focal position
can be made wide from shallow to deep. The first and third lens portions 22a and 22c have an
aspheric shape in part, since the effect of allowing the focal position to be deeper can be
obtained, so all of them must have an aspheric shape. There is no need. Further, the shape of at
least the first and third lens portions 22a and 22c may be aspheric, and the shape of the second
lens portion 22b may be spherical or aspheric.
[0052]
In this embodiment, the curvatures of the aspheric surfaces of the first and third lens portions
22a and 22c become closer to the curvature of the second lens portion 22b as they approach the
second lens portion 22b from the end in the minor axis direction. It is a curvature.
[0053]
In the acoustic lens 22, a second lens unit 22 b is provided corresponding to the second
transmission / reception unit 212.
In addition, the first lens unit 22 a is provided corresponding to the first transmission / reception
unit 211. Furthermore, a third lens unit 22 c is provided corresponding to the third transmission
/ reception unit 213. As shown in FIG. 7, the width in the minor axis direction of each of the
transmitting and receiving units 211, 212, and 213 is about 3.0 mm, so the second lens portion
22b and the first and third lens portions 22a and 22c in the minor axis direction The width is
about 3.0 [mm]. Moreover, in this embodiment, the first, second and third lens portions 22a, 22b
and 22c are provided corresponding to the first, second and third transmission / reception units
211, 212 and 213, for example, Even when the lens units are provided corresponding to the five
or more transmission / reception units 210, the first and third lens units 22a and 22c located on
both sides of the central second lens unit 22b have an aspherical shape, so that The focal
position of the acoustic beam can be deepened, and the ultrasonic beam can be uniformly and
finely focused in the deep part.
[0054]
FIG. 8A is a diagram showing the relationship between the second transmitting / receiving unit
212 used and the shape of the ultrasonic beam. FIG. 8B is a view showing the relationship
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18
between the first, second and third transmission / reception units 211, 212 and 213 used and
the shape of the ultrasonic beam. FIG. 8C is a diagram showing the shape of the combined
ultrasonic beam. Here, the transmission / reception unit 210 to be used refers to the
transmission / reception unit 210 selected as the drive transmission / reception unit by the
switching setting unit 24.
[0055]
When the second transmission / reception unit 212 (see FIG. 7) is selected as the drive
transmission / reception unit by the switching setting unit 24, as shown in FIG. 8A, the acoustic
lens 22 transmits / receives ultrasonic waves from the second transmission / reception unit 212.
The beam is focused to be narrow at a focal position where the focal distance is shallow. When
the first, second and third transmission / reception units 211, 212 and 213 (see FIG. 7) are
selected as the drive transmission / reception units by the switching setting unit 24, the first and
third lens units 22a and 22c are not Due to the spherical shape, as shown in FIG. 8B, the acoustic
lens 22 can focus the ultrasonic beam so as to be uniformly thin at the focal position where the
focal distance is deep. In addition, the transmission / reception unit used by the switch unit 23 is
switched to the second transmission / reception unit 212 when focusing the ultrasonic beam on
a shallow area, and the first, second, and third when focusing the ultrasonic beam on a deep area.
By switching to the third transmission / reception units 211, 212, and 213, as shown in FIG. 8C,
it is possible to substantially uniformly focus the ultrasonic beam over a wide range from a
shallow portion to a deep portion.
[0056]
As described above, the ultrasonic probe 2 according to the first embodiment includes the
plurality of transmitting / receiving units 210 arranged in the minor axis direction, and the
acoustic lens 22 for focusing the transmitting and receiving beams of ultrasonic waves in the
minor axis direction. The switch setting unit 24 selects a drive transmission / reception unit from
among the plurality of transmission / reception units 210, and a switch unit 23 that switches the
operation of the transmission / reception unit 210 according to a switch switching signal from
the switching setting unit 24. The acoustic lens 22 has first, second and third lens portions 22a,
22b and 22c corresponding to the first, second and third transmission / reception units 211, 212
and 213, and the first and third lenses The portions 22a, 22c have an aspheric shape.
[0057]
03-05-2019
19
As described above, by selecting the drive transmitting / receiving units from the plurality of
transmitting / receiving units 210 by the switching setting unit 24, it is possible to easily change
the imaging range by changing the focal position of the ultrasonic beam. As a result, it is possible
to make the ultrasonic probe easy to use with a simple configuration. In addition, since an
electronic circuit or the like is unnecessary and the number of electrode leads can be reduced, it
is not necessary to have a complicated configuration, resulting in low cost. Furthermore, the
ultrasonic beam can be focused uniformly and thinly over a wide area from the shallow to the
deep, and the spatial resolution can be improved, and the direction of travel is sufficient even
when the puncture needle 3 deviates in the short axis direction. It is possible to realize with one
ultrasonic probe 2 a function capable of accommodating the puncture needle 3 in the deflected
ultrasonic beam.
[0058]
Second Embodiment FIG. 9 is a view showing an ultrasonic probe 2 according to a comparative
example. FIG. 9 shows a general ultrasonic probe 2 having a minor axis division ratio of 1: 2: 1.
Here, when the second transmission / reception unit 212 is selected by the switching setting unit
24 as the drive transmission / reception unit, the opening width is, for example, 3 mm (small
opening). The opening width is, for example, 6 [mm] when the switching setting unit 24 selects
the first, second, and third transmitting and receiving units 211, 212, and 213 as the drive
transmitting and receiving units (opening large).
[0059]
The minor axis division ratio 1: 2: 1 is a minor axis division ratio suitable for uniformly and finely
focusing the ultrasonic beam from the shallow portion to the deep portion, as described above.
[0060]
FIG. 10 is a view showing the relationship between the transmitting and receiving unit 210 used
and the shape of the ultrasonic beam.
In FIG. 10, the shape of the ultrasonic beam when only the first transmission / reception unit 211
is used is shown by a thick broken line, and the shape of the ultrasonic beam when the first and
03-05-2019
20
second transmission / reception units 211 and 212 are used Is shown by a dotted line.
[0061]
As shown by the thick broken line in FIG. 10 as the shape of the ultrasonic beam, when only the
first transmission / reception unit 211 is selected, the ultrasonic beam is too small for the used
aperture width compared to the entire aperture width. Since the directionality of the ultrasound
in the shallow area is not opposite to the intended side due to the deflection, the position of the
puncture needle 3 may be misidentified. Further, as shown by dotted lines in FIG. 10, when the
first and second transmission / reception units 211 and 212 are selected as shown by dotted
lines in the shape of the ultrasonic beam, the progress of ultrasonic waves because there are few
third transmission / reception units 213 not selected. The deflection of the direction is small, and
there is no difference as compared with the traveling direction of the ultrasonic wave when the
first, second and third transmission / reception units 211, 212 and 213 are selected.
[0062]
When the puncture needle 3 is pierced toward a specific site in the subject, it is necessary to
sequentially check the positional movement (displacement) of the puncture needle 3. When the
position movement of the puncture needle 3 is relatively large, it is necessary to largely deflect
the traveling direction of the ultrasonic wave. The acoustic probe 2 is not suitable for specifying
the positional movement of the puncture needle 3.
[0063]
In the second embodiment, the second switch portion 232 is connected to the switching element
31 and the switching element 31 so as to be suitable for deflecting the traveling direction of
ultrasonic waves while setting the minor axis division ratio to 1: 2: 1. And an electric circuit 32
connected in parallel.
[0064]
FIG. 11 is a view showing an ultrasound probe 2 according to a second embodiment.
03-05-2019
21
FIG. 12 is a diagram showing an example of the configuration of the electric circuit 32. As shown
in FIG.
[0065]
As shown in FIG. 11, transmission / reception signals are transmitted / received to the first,
second and third transmission / reception units 211, 212 and 213 via the first, second and third
switch units 231, 232 and 233, respectively. Ru. The switching setting unit 24 includes a register
240. Registers 241, 242 and 243 are provided corresponding to the first, second and third
switch portions 231, 232 and 233, respectively. The first, second and third switch portions 231,
232 and 233 are switched on / off in accordance with switch switching signals input from the
control unit 11 in advance and stored in the registers 241, 242 and 243. The first, second and
third switch portions 231, 232 and 233 are not particularly limited, but in consideration of
power consumption and withstand voltage performance related to ultrasonic transmission and
reception, for example, FET (field effect transistor) Is preferably used.
[0066]
The second switch portion 232 includes a switching element 31 and an electric circuit 32
connected in parallel to the switching element 31. Thereby, when the second transmission /
reception unit 212 is selected as the drive transmission / reception unit by the switching setting
unit 24, the second transmission / reception unit 212 does not pass through the electric circuit
32 by turning on the switching element 31. Send and receive This is referred to as a first
operation state of the second transmission / reception unit 212. When deflection in the traveling
direction of the ultrasonic wave is performed, the second transmission / reception unit 212 is not
selected as the drive transmission / reception unit by the switching setting unit 24 and the
switching element 31 is turned off. Transmit and receive ultrasound via 32. This is referred to as
a second operation state of the second transmission / reception unit 212 (corresponding to
“non-operation of transmission / reception unit” in the present invention).
[0067]
For example, when the traveling direction of the ultrasonic wave is deflected to the right in FIG.
11, the switching element 31 is turned off and the first switch portion 231 is turned on. As a
result, the second transmitting and receiving unit 212 transmits and receives ultrasonic waves
03-05-2019
22
via the electric circuit 32 (second operation state). In addition, the first transmission / reception
unit 211 is switched to the drive transmission / reception unit. On the other hand, when the
traveling direction of the ultrasonic wave is deflected to the left in FIG. 11, the switching element
31 is turned off and the third switch portion 233 is turned on. As a result, the second
transmitting and receiving unit 212 transmits and receives ultrasonic waves via the electric
circuit 32 (second operation state). In addition, the third transmission / reception unit 213 is
switched to the drive transmission / reception unit.
[0068]
When only the second transmission / reception unit 212 is used (small opening), the switching
element 31 is turned on and the first and third switch units 231 and 233 are turned off. As a
result, the second transmission / reception unit 212 switches to transmission / reception of
ultrasonic waves without passing through the electric circuit 32 (first operation state). In
addition, the first and third transmission / reception units 211 and 213 are no longer drive
transmission / reception units. When the first, second and third transmission / reception units
211, 212 and 213 are used (aperture size is large), the switching element 31 is turned on. As a
result, the second transmission / reception unit 212 switches to transmission / reception of
ultrasonic waves without passing through the electric circuit 32 (first operation state). In
addition, the first and third switch portions 231 and 233 are turned on. Thereby, the first and
third transmission / reception units 211 and 213 are switched to the drive transmission /
reception unit.
[0069]
The electric circuit 32 is composed of a circuit consisting of only a resistor R (see FIG. 12A), a
circuit consisting of an LC (see FIG. 12B), and a circuit consisting of an RLC (see FIG. 12C).
[0070]
When the switching element 31 in FIG. 11 is off, the signal applied to the second transmitting
and receiving unit 212 and the electrical signal converted from the ultrasonic wave received by
the second transmitting and receiving unit 212 pass through the electric circuit 32.
When the switching element 31 is on, the signal and the electrical signal do not pass through the
electrical circuit 32.
03-05-2019
23
[0071]
In the configuration in which the electric circuit 32 is not provided, when the first transmission /
reception unit 211 and the second transmission / reception unit 212 are compared, the second
transmission / reception unit 212 has a longer width in the short axis direction and a wider area.
Since the sensitivity is high and dominant as compared with the first transmission / reception
unit 211, the deflection angle of the ultrasonic beam decreases. In the present embodiment, by
using the resistor R for the electric circuit 32 as shown in FIG. 12A, the sensitivity of the second
transmission / reception unit 212 is lowered to allow the first transmission / reception unit 211
and the second transmission / reception unit 212 to be separated. The balance can be balanced,
and the deflection angle of the ultrasonic beam can be increased.
[0072]
Further, by using an LC circuit for the electric circuit 32 as shown in FIG. 12B, the phase of the
signal of the second transmission / reception unit 212 can be corrected to be shifted to the first
transmission / reception unit 211, and the deflection angle of the ultrasonic beam It can be
enlarged.
[0073]
Further, by using the circuit composed of LCR as shown in FIG. 12C for the electric circuit 32, the
above two effects can be achieved, and the deflection angle of the ultrasonic beam can be
increased.
[0074]
Third Embodiment Next, an ultrasonic probe 2 according to a third embodiment will be described
with reference to FIG. 13 to FIG.
FIG. 13 is a view showing an ultrasound probe.
FIG. 14 is a diagram showing the relationship between the first section 212a used and the
traveling direction of the ultrasonic wave. FIG. 15 is a diagram showing the relationship between
03-05-2019
24
the first transmission / reception unit 211 used and the traveling direction of the ultrasonic
wave.
[0075]
In the ultrasound probe 2 having a minor axis division ratio of 1: 2: 1, the switching setting unit
24 selects, for example, only the first transmission / reception unit 211 (short axis width is
“1”) to transmit and receive ultrasonic waves. When done, the shape of the ultrasonic beam is
as shown in FIG.
[0076]
The depth of the intersection of the line in the direction of travel of the ultrasonic wave and the
central axis of the entire short axis direction is relatively deep.
That is, in the shallow part, the directivity of the ultrasonic wave appears on the side opposite to
the side intended to deflect the traveling direction of the ultrasonic wave, so that the position of
the puncture needle 3 may be mistaken.
[0077]
In the second embodiment described above, in the ultrasonic probe 2 with the minor axis division
ratio 1: 2: 1, the electric circuit 32 in which the second switch portion 232 is connected in
parallel to the switching element 31 and the switching element 31. As a result, the minor axis
division ratio is functionally close to 1: 1: 1.
[0078]
On the other hand, in the third embodiment, in the ultrasound probe 2 with the minor axis
division ratio 1: 2: 1, the second transmitting / receiving unit 212 is divided into first and second
at the boundary in the minor axis direction. And the switch setting unit 24 drives and transmits
either one of the first and third transmission / reception units 211 and 213 and one of the first
and second divisions 212a and 212b. By selecting as a part, in the shallow part, the directivity of
the ultrasonic wave is made to appear on the side intended for the deflection of the traveling
direction of the ultrasonic wave.
[0079]
03-05-2019
25
As shown in FIG. 13, the first switch unit 231 is connected to the first transmission / reception
unit 211 and the third transmission / reception unit 213.
The first switching element 232a is connected to the first section 212a.
The second switching element 232b is connected to the second section 212b. Further, resistors
241, 242a, 242b are provided corresponding to the first switch portion 231, the first switching
element 232a, and the second switching element 232b.
[0080]
When only the second transmission / reception unit 212 is used (small opening), the switching
setting unit 24 turns on the first and second switching elements 232a and 232b and turns off the
first switch unit 231. Thereby, the first and second sections 212a and 212b are switched to the
drive transmitting / receiving unit.
[0081]
When the first, second, and third transmission / reception units 211, 212, and 213 are used (the
opening is large), the switch setting unit 24 includes the first switch unit 231, the first switching
element 232a, and the second switching element 232b. Turn on. Thereby, the first and third
transmission / reception units 211 and 213, and the first and second sections 212a and 212b
are switched to the drive transmission / reception unit.
[0082]
FIG. 14 shows, for example, the shape of an ultrasonic beam formed using the first section 212a.
According to FIG. 14, the directivity of the ultrasonic wave appears on the side where the
deflection of the traveling direction of the ultrasonic wave is intended in the shallow part. As
described above, it is possible to obtain a good deflected beam by using this method.
03-05-2019
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[0083]
As described above, the ultrasound probe 2 according to the third embodiment includes the
plurality of transmission / reception units 210 arranged in the short axis direction, and the
acoustic lens 22 for focusing the transmission / reception beam of the ultrasonic wave in the
short axis direction. A switch setting unit 24 for selecting a drive transmission / reception unit
among the plurality of transmission / reception units 210; and a switch unit 23 for switching the
operation of the transmission / reception unit 210 based on a switch switching signal from the
switching setting unit 24; The switch portion 212 has first and second sections 212a and 212b,
the switch portion 23 has first and second switch portions 231 and 232, and the second switch
portion 232 has first and second portions. The second switching elements 232a and 232b are
provided.
[0084]
In the above configuration, the first and third transmission / reception units 211 and 213 are
switched to the drive transmission / reception unit as selected by the switching setting unit 24,
and the first and second sections 212a and 212b of the second transmission / reception unit 212
are selected. By switching to the drive transmission / reception unit, the focal position of the
transmission / reception beam is changed to the deep part, and the first and third transmission /
reception units 211 and 213 are not switched to the drive transmission / reception unit. By
switching the second sections 212a and 212b to the drive transmission / reception unit, the focal
position is changed to the shallow part.
[0085]
Further, for example, by switching the switching element 212a to the drive transmitting and
receiving unit by selection by the switching setting unit 24, the traveling direction of the
ultrasonic wave is favorably deflected.
[0086]
As described above, it is possible to preferably perform deflection of the traveling direction of the
ultrasonic wave while enabling focusing of the ultrasonic beam from the shallow portion to the
deep portion by setting the minor axis division ratio to 1: 2: 1.
[0087]
In the above embodiment, the acoustic lens 22 in which the first and third lens portions 22a and
03-05-2019
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22c have an aspheric shape is provided to the ultrasonic probe 2 having a minor axis division
ratio of 1: 1: 1. However, the present invention is not limited to this.
For example, it may be provided in the ultrasound probe 2 with a minor axis division ratio 1: 2: 1.
In this case, the shapes of the aspheric surfaces of the first and third lens portions 22a and 22c
may be adapted to the ultrasonic probe 2 having a minor axis division ratio of 1: 2: 1.
[0088]
In the above embodiment, the control operation for setting the switch setting unit 24 is
performed by the ultrasonic diagnostic apparatus main body 1, but the present invention is not
limited to this.
For example, the switching setting unit 24 may have a control unit (switching control unit), and
the control operation related to switching of the switch unit 23 may be performed by the
ultrasound probe 2.
In addition to the input operation to the operation input unit 28 of the ultrasound probe 2 or in
addition to the input operation, the switching of the deflection direction or the like according to
the input operation to the operation input unit 18 of the ultrasound diagnostic device main body
1 Can be set. As a result, the switching operation relating to the deflection of the imaging range
can be completed inside the ultrasound probe 2, so exchange of control signals with the
ultrasound diagnostic device main body 1 becomes easier. Further, the switching setting unit 24
may be provided in the ultrasonic diagnostic apparatus main body.
[0089]
Further, in the above embodiment, although the ultrasonic diagnostic apparatus U includes the
ultrasonic probe 2 and the ultrasonic diagnostic apparatus main body 1, an ultrasonic probe in
which the operation and the deflection control can be performed independently. The child 2 may
be connected to a normal ultrasonic diagnostic apparatus main body 1 and used.
03-05-2019
28
[0090]
In the above embodiment, assuming that only one of the first, second and third transmitting /
receiving units 211, 212 and 213 is used for transmission / reception, S / S decreases with the
decrease in ultrasonic transmission / reception intensity. Since the N ratio greatly decreases, the
widths and voltage amplitudes of the first, second, and third transmitting / receiving units 211,
212, 213 so that the S / N ratio (reception intensity) with which the puncture needle 3 can be
reliably detected. Etc. may be set.
[0091]
Further, the arrangement in the scanning direction does not have to be a linear scanning type,
and may be another array, a sector scanning type, a convex type, a radial scanning type, or the
like.
[0092]
In the above embodiment, the puncture needle 3 has been described as being a part of the
ultrasonic diagnostic apparatus U attached to the ultrasonic probe 2 from the attachment portion
4. However, the puncture needle 3 is inserted while being displayed on the diagnostic image The
puncture needle 3 may be configured separately from the ultrasound diagnostic device U.
[0093]
In addition, any of the above-described embodiments is merely an example of implementation for
carrying out the present invention, and the technical scope of the present invention should not
be interpreted in a limited manner by these.
That is, the present invention can be implemented in various forms without departing from the
scope or main features of the present invention.
[0094]
Reference Signs List 1 ultrasound diagnostic apparatus main body 2 ultrasound probe 3
puncture needle 11 control unit 111 switching control unit 12 transmission drive unit 13
reception processing unit 14 transmission / reception switching unit 15 image generation unit
16 image processing unit 18 operation input unit 19 output display unit 21 transmit / receive
unit array 210 transmit / receive unit 211 first transmit / receive unit 212 second transmit /
receive unit 212a first section 212b second section 213 third transmit / receive unit 21A
03-05-2019
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vibrator 22 acoustic lens 22a first lens section 22b second lens Section 22c Third lens section 23
Switch section 231 First switch section 232 Second switch section 232a First switching element
232b Second switching element 233 Third switch section 24 Switching setting section 28
Operation input section 31 Switching element 32 Electricity Circuit U ultrasonic diagnostic
equipment
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