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DESCRIPTION JPH03128046

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DESCRIPTION JPH03128046
[0001]
[Object of the Invention] (Industrial field of application) The present invention relates to an
ultrasonic transducer for transmitting and receiving ultrasonic waves and an imaging apparatus
using the same. (Prior Art) Ultrasonic waves can be used to obtain a tomogram of a subject, blood
flow velocity information, and the like. Here, a representative tomogram imaging device will be
described. That is, the ultrasonic tomogram imaging apparatus comprises an ultrasonic probe
having an ultrasonic transducer, an ultrasonic transmitter-receiver, and a signal processing /
display device, and an ultrasonic pulse from the ultrasonic transmitter-receiver is equivalent to
that of the ultrasonic probe. When applied to the ultrasonic transducer, ultrasonic waves are
transmitted, and the reflected wave is received by the same ultrasonic transducer to obtain a
reception signal. This received signal is signal processed by a signal processing / display device
and displayed as an image. Among such devices, there are those referred to as electronic
scanning devices, which include an ultrasonic transducer and an ultrasonic probe having a
transducer group element in which a large number of micro-oscillators are provided side by side.
Is used. Then, ultrasonic waves are focused and deflected by transmitting and receiving each
transducer group of the transducer group elements with different delay amounts, and as a result,
a real-time tomographic image is obtained only by electrical operation. be able to. On the other
hand, the ultrasound probe may be, for example, a body surface probe or a body cavity probe in
the case of a medical ultrasound diagnostic apparatus, depending on a tomogram object or its
site. For the body surface probe, a multicore cable is connected to the ultrasonic transducer, and
the ultrasonic transducer is housed in the probe case, and the operator holds the probe case with
his hand to carry out the ultrasonic transducer. The ultrasonic wave transmission / reception
wavefront of is applied to a body surface such as the belly of the subject. Also, in the body cavity
probe, a multi-core cable is connected to the ultrasonic transducer, and the ultrasonic transducer
is incorporated into one end of the rod, and the operator uses the other end of the rod with his
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hand. It is held at one end, that is, the ultrasonic wave transmitting and receiving surface of the
ultrasonic transducer is inserted into a body cavity such as the anus of the subject. In addition to
the body cavity probe of such a configuration, an ultrasonic transducer is incorporated at the end
of the electronic endoscope scope, or an ultrasonic transducer is incorporated at the end of the
fiber endoscope scope. Some of these can also be classified as body cavity probes. (Problem to be
Solved by the Invention) In the imaging method using the above-mentioned probe for body
cavity, the operation can achieve the purpose of imaging by obtaining a tomogram for one cross
section.
However, in diagnostic imaging of digestive organs, there are some in which suitable diagnosis is
performed by obtaining tomograms on two orthogonal planes. Hereinafter, a body cavity probe
capable of imaging two orthogonal planes will be described with reference to FIG. As shown in
FIG. 8, an ultrasonic transducer 2 for obtaining a tomogram (shown-dot-and-dash line A) of one
cross section is incorporated at the end of the probe frame 1 and a tomogram of the other cross
section (shown The dashed dotted line B1A plane is orthogonal to the B plane. The ultrasound
transducer 3 is incorporated to obtain. In this case, since both ultrasonic transducers 2.3 are
arranged at the end of the probe frame 1, the shape of the end inevitably becomes long and not
only difficult to insert in the body cavity. If the object to be imaged was a living body, it would
cause pain, which was a problem. Therefore, an object of the present invention is to provide an
ultrasonic transducer that can be easily inserted into a hole such as a body cavity and to image
two surfaces of the hole and an imaging apparatus using the same. It is in. [Configuration of the
Invention] (Means for Solving the Problems) In the ultrasonic transducer according to the
invention of claim 1, the transducer array elements are provided on both sides of the backing
material, and the transducer array direction of both transducer group elements is An imaging
apparatus according to the invention of claim 2 characterized in that the imaging apparatus
according to the invention of claim 2 comprises the ultrasonic transducer of the invention of
claim 1, and the ultrasonic transducer transmits and receives ultrasonic waves from the
ultrasonic transducer to the subject. The imaging apparatus according to the invention of claim 3
having means for obtaining an ultrasonic image by performing the method comprises the
ultrasonic transducer according to the invention of claim 1 from the ultrasonic transducer.
Means for obtaining an ultrasonic image by transmitting and receiving ultrasonic waves to and
from an object, and at least one of an optical image of the object and image information obtained
by converting the optical image of the object into an electrical signal Characterized by
comprising a stage. According to the invention of claim 1, the ultrasonic transducer integrated
with the transducer group elements provided on both sides of the backing material transmits and
receives two systems of ultrasonic beams different in the scanning direction of the ultrasonic
beam. I can wave. Therefore, the integration enables an ultrasonic transducer to be miniaturized
and allows imaging of two planes in different scanning directions. According to the second aspect
of the present invention, in addition to the function of the first aspect of the present invention,
since the device can be made into a small image or a device, it can be easily inserted into a hole
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such as a body cavity. According to the imaging apparatus of the third aspect of the present
invention, in addition to the function of the first aspect of the present invention, since it is
possible to make a small image or a device, it can be easily inserted into a hole such as a body
cavity. The surface image of the sample can be displayed.
An embodiment of the ultrasonic transducer according to the present invention will be described
below with reference to FIG. That is, as shown in FIG. 1, on one surface of the backing material
11 for absorbing ultrasonic waves, a transducer element 12A made of, for example, piezoelectric
ceramic and having a large number of micro-strip shaped ultrasonic transducers arranged in
parallel, A flexible signal line plate 13A, a matching layer 14A, and an acoustic lens 15A for
providing an excitation pulse to the ultrasonic transducer group and extracting an echo signal
are provided by adhesion or the like, and the other surface of the backing material 11 is
provided. For example, a transducer element 12B made of piezoelectric ceramic and formed by
arranging a large number of micro-strip shaped ultrasonic transducers in parallel, a flexible
signal line board 13B for giving an excitation pulse to the ultrasonic transducer group and
extracting an echo signal, The matching layer 14B and the acoustic lens 15B are provided by
adhesion or the like, and the transducer array directions of the transducer elements 12A and 12B
are orthogonal to each other. To have. According to the ultrasonic transducer of the present
embodiment configured as described above, scanning of ultrasonic beams from the ultrasonic
transducer integrated by providing the transducer group elements 12A and 12B on both surfaces
of the backing material 11 It can transmit and receive ultrasonic beams of two systems with
different directions. Therefore, the integration enables an ultrasonic transducer to be
miniaturized and allows imaging of two planes in different scanning directions. In the above
example, the transducer group element 12A. The transducer arrangement directions of 12 B are
orthogonal to each other, but may be simply different from each other. Next, an example of an
imaging apparatus using the above-mentioned ultrasonic transducer will be described with
reference to the drawings. FIG. 2 is a perspective view showing a body cavity ultrasonic probe
used in the electronic sector scanning type ultrasonic diagnostic apparatus, wherein a rod 22 is
provided on the grip 21 from which the cable 20 is drawn, and the rod 22 The ultrasonic
transducer 23 shown in FIG. The reference numeral 24 is a marker for clearly showing to the
operator the scanning direction of the tomographic image as a reference, and the flexible signal
line plates 13A and 13B of the ultrasonic transducer 23 are embedded in the rod 22. It is done.
According to the ultrasound probe for body cavity of such a configuration, since a compact probe
can be realized, it can be easily inserted into a hole such as a body cavity. FIG. 3 is a view
showing the manufacture of the above-mentioned ultrasonic probe for body cavity, wherein a
hole 22A is provided in advance at the end of the rod 22, and an ultrasonic transducer is inserted
in the hole 22A. Alternatively, the entire rod 22 may be molded with a resin or the like so that
the ultrasonic transducer 23 is contained therein.
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FIG. 4 is a perspective view showing a side-view type scope used in the electronic endoscope
apparatus, in which a flexible rod 32 is provided on a grip 31 from which a cable 30 is derived,
the flexible rod The body 32 can be bent by a dial 33 provided on the grip 31, and at the end of
the flexible rod 32, an ultrasonic transducer 23 shown in FIG. 1 is provided, and this ultrasonic
wave is also provided. An optical image manpower window 34 is provided on the same surface
on which the transducer 23 is provided. The reference numeral 35 is a marker for clearly
showing the operator the scanning direction of the tomographic image as a reference, and the
flexible signal line plates 13A and 13B of the ultrasonic transducer 23 and the optical image
manpower window 34. A signal line or the like from an imaging element (not shown) provided at
the lower part of the lower part of the lower part is embedded in the flexible rod 32. According
to the side-viewing electronic endoscope having such a configuration, a compact scope capable
of acquiring an ultrasonic image can be realized, so that it can be easily inserted into a hole such
as a body cavity. FIG. 5 is also a perspective view showing a side-view type scope used in the
electronic endoscope apparatus, and FIG. 4 shows that the ultrasonic transducer 23 and the
optical image input window 34 are on the same plane An example of what is not formed is
shown. FIG. 6 is a perspective view showing a forward looking scope used in the electronic
endoscope apparatus, and unlike the one in FIG. 4, the optical image input window 34 is at the
tip of the flexible rod 32. In this example, an ultrasonic transducer 23 is provided behind the
optical image human power window 34. In this example, since the optical image human power
window 34 is provided in front of the ultrasonic transducer 23, a through hole is formed in the
backing material 11 of the ultrasonic transducer 23, as shown in FIG. A signal line 36 or the like
from the image pickup element from the optical image human power window 34 is passed
through the through hole. The through holes formed in the backing material 11 have a function
as a backing material, that is, an extent that the absorption characteristics of ultrasonic waves are
not impaired. In the example shown in FIGS. 4 to 7, although the electronic endoscope apparatus
is described, the invention can be applied to a scope using an optical fiber, and an endoscope
apparatus having both an imaging device and an optical fiber can be applied. Applicable In
addition, various modifications can be made without departing from the scope of the present
invention. [Effects of the Invention] As described above, in the ultrasonic transducer according to
the first aspect of the present invention, the transducer group elements are provided on both
sides of the backing material and the transducer array directions of the two-plate moving
element group elements are different from each other. According to the first aspect of the
present invention, two systems of ultrasonic waves having different scanning directions of
ultrasonic beams from an ultrasonic transducer integrated by providing transducer group
elements on both surfaces of a backing material are integrated. The beam can be transmitted and
received.
Therefore, the integration enables an ultrasonic transducer to be miniaturized and allows
imaging of two planes in different scanning directions. The imaging apparatus according to the
invention of claim 2 has the ultrasonic transducer of the invention of claim 1, and ultrasonic
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waves are transmitted and received from the ultrasonic transducer to the subject. According to
the invention of claim 2 having means for obtaining, in addition to the function of the invention
of claim 1, it can be easily inserted into a hole such as a body cavity because it can be a small
image or a device. become. An imaging apparatus according to the invention of claim 3
comprises the ultrasonic transducer of the invention of claim 1, and means for obtaining an
ultrasonic image by transmitting and receiving ultrasonic waves from the ultrasonic transducer
to a subject. 4. The imaging apparatus according to claim 3, further comprising: means for
obtaining at least one of the optical image of the subject and the image information obtained by
converting the optical image of the subject into an electrical signal. For example, in addition to
the function of the invention of the first aspect, since the device can be made into a small image
or device, it can be easily inserted into a hole such as a body cavity, and a surface image of the
subject can be displayed. Therefore, according to the present invention, it is possible to provide
an ultrasonic transducer capable of being easily inserted into a hole such as a body cavity and
imaging two surfaces of the hole and an imaging apparatus using the same. Can.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view showing the configuration of an embodiment of an ultrasonic
transducer according to the present invention, and FIG. 2 is an example of an imaging apparatus
using the ultrasonic transducer shown in FIG. 3 is a perspective view showing a method of
manufacturing the ultrasonic probe for body cavity shown in FIG. 2, FIG. 4 to FIG. 6 show the
ultrasonic transducer shown in FIG. FIG. 7 is a perspective view showing a forward looking scope
used in an electronic endoscope apparatus as an example of the imaging apparatus used, FIG. 7 is
a perspective view showing a method of manufacturing the forward looking scope shown in FIG.
FIG. 1 is a perspective view showing a conventional ultrasound probe for body cavity.
11: backing material, 12A, 12B: vibrator element, 13A, 13B: flexible signal line board, 14A, 14B:
matching layer, 15A, 15B: acoustic lens, 20: Cable 21 21 grip 22 rod 23 ultrasonic transducer 30
cable 3 grip 2 flexible rod 3 3 Dial, 34: Optical image input window.
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