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DESCRIPTION JPS63122432

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DESCRIPTION JPS63122432
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
mechanical scanning ultrasound endoscope. [Prior Art] In recent years, an ultrasonic endoscope
provided with an ultrasonic scanning mechanism in an endoscope as a body cavity ultrasonic
diagnostic apparatus has been developed and put to practical use "; Among them, a mechanical
scanning ultrasonic endoscope is provided with a rotating body incorporating an ultrasonic
probe at the tip of the insertion portion, and a rotational drive force is applied to the rotating
body to rotate the ultrasonic probe. Thus, the ultrasound scanning from the body cavity is
performed. Such a mechanical scanning ultrasound endoscope is used for precise diagnosis of
the inner wall tissue such as the stomach and duodenum or ultrasonic diagnosis of the pancreas
and surrounding organs through the gastric pouch after the insertion portion is inserted into the
body cavity. Precise diagnosis of tissue requires a high resolution ultrasonic probe with high
oscillation frequency. However, ultrasonic waves with high frequency are easily attenuated, so
they are not suitable for diagnosis of deep organs such as the pancreas. [Problems to be Solved
by the Invention] As disclosed in Japanese Patent Application Laid-Open No. 61-64240, the
conventional ultrasonic endoscope has a single probe having a single frequency at the tip of the
insertion portion. The probe with high oscillation frequency has difficulty in diagnosing the deep
organ, and the probe with low oscillation frequency can diagnose the deep organ, because the
probe is only disposed. Precise diagnosis with resolution becomes impossible. Therefore, it is
desired to develop an apparatus capable of making a wide range of diagnosis by varying the
frequency of ultrasonic waves. As a method of making the frequency of ultrasonic waves variable,
it is conceivable to dispose a plurality of probes at the tip of the insertion portion, but if a
plurality of probes is provided at the tip of the insertion portion, the outer diameter of the tip is
Become fattering, and there are obstacles such as giving pain to patients. In addition, when an
ultrasonic image is extracted in real time, in the case of targeting an organ having a fast
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movement, it is necessary to increase the number of ultrasonic waves transmitted and received.
In such a case, even if it is attempted to cope with the conventional probe by rotating it at high
speed, the ultrasonic waves that can be received to rotate at high speed become short, and
information on long distances can not be obtained. The present invention has been made under
these circumstances, and the object of the present invention is to provide an ultrasonic
endoscope capable of performing multi-functional ultrasonic diagnosis with a single probe. It is.
[Means for Solving the Problems and Actions] In order to solve the above problems, the present
invention arranges at least two piezoelectric elements on both sides of the damping layer of the
ultrasonic probe, and It is characterized by sharing. That is, in the present invention, different
frequencies can be transmitted and received by one ultrasonic probe by arranging at least two
piezoelectric elements on both sides of the damping layer.
Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1 to 3 show a first embodiment of the present invention, and FIG. 1 is a view showing the
overall configuration of an ultrasonic endoscope. The ultrasonic endoscope 1 has an operation
unit 2 and an insertion unit 3, and the operation unit 1 is provided with an eyepiece unit 4, a
bending operation knob 5, a probe drive scanning unit 6, and a treatment tool insertion lower
unit. In addition, a universal cord 8 connected to a light source device or the like (not shown) is
connected. On the other hand, the insertion portion 2 is formed by sequentially connecting the
flexible tube 9 and the bending tube 10 from the operation portion 2 side, and the endoscope tip
portion 11 is provided at the tip of the bending tube 1 o. An objective lens, an illumination lens,
an air / water supply port (all not shown), and the like are provided on a peripheral wall of the
endoscope distal end portion 11 and has the same function as a normal endoscope. Further, an
ultrasonic wave transmitting / receiving unit 12 for transmitting and receiving ultrasonic waves
is provided at the tip of the endoscope tip portion 11. As shown in FIGS. 2 and 3, the ultrasonic
transmitting / receiving unit 12 has a rotating body 16 in which an ultrasonic probe 15 is
incorporated inside an exterior member 14 filled with a liquid ultrasonic wave conductive
medium 13. The bearing 17 is provided rotatably. The rotating body 16 is attached to the tip of a
hollow flexible shaft 18 provided in the insertion portion 3 and is driven by a drive motor (not
shown) of the probe drive scanning portion 6 provided in the operation portion 2. It is
rotationally driven through the flexible shaft 18. The ultrasonic probe 15 has a single damping
layer 19 at its central portion, and a piezoelectric element 20A having a high oscillation
frequency and a piezoelectric element 20B having a low oscillation frequency are disposed on
opposite sides of the damping layer 19. Further, an acoustic matching lens 21.21 is disposed on
the ultrasonic wave transmitting / receiving surface of the piezoelectric elements 20A, 20B. The
piezoelectric elements 20A and 20B are connected to the signal cable 23.degree. Through leads
22.22. The signal cables 23.23 are inserted into the through holes formed in the central portion
of the flexible shaft 18 and guided to the operation unit 2, and the probe drive scanning unit 6
provided in the operation unit 2 is illustrated. Not connected to the ultrasonic transmission and
reception circuit. Next, the operation of the device thus configured will be described. When
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ultrasonic diagnosis is performed using the present apparatus, first, the insertion unit 3 is
inserted into a body cavity of a patient, and the ultrasonic transmission / reception unit 12
provided at the tip of the insertion unit 3 is brought close to the test site to scan ultrasonic
waves. Do. At this time, when the piezoelectric element 20A is driven while transmitting the
rotational force to the rotating body 16 via the flexible shaft 18 and rotating the ultrasonic probe
15, an ultrasonic wave having a high frequency is transmitted from the ultrasonic transmitting /
receiving unit 12 Therefore, precise diagnosis of inner wall tissue such as stomach and
duodenum can be performed with high resolution.
In addition, when the piezoelectric element 20B is driven while rotating the ultrasonic probe 15,
an ultrasonic wave with a low frequency is transmitted from the ultrasonic transmitting and
receiving unit 12, so that ultrasonic diagnosis of a deep organ can be performed. As described
above, in the present embodiment, since the piezoelectric rope 20A having a high oscillation
frequency and the piezoelectric element 20B having a low oscillation frequency are disposed on
both sides of the damping layer 19, one of the piezoelectric elements is driven to drive the
stomach or duodenum. Precision diagnosis of inner wall tissue such as, and ultrasonic diagnosis
of deep organs such as pancreas can be performed with one probe. In the above embodiment,
piezoelectric elements having different oscillation frequencies are provided on both sides of the
damping layer, but piezoelectric elements having the same frequency may be provided. In this
way, the number of ultrasonic waves transmitted and received during one rotation of the probe
15 can be increased, and an ultrasonic image of a fast moving organ can be extracted in real
time. Further, as shown in FIGS. 4 and 5, for example, four piezoelectric elements 20A, 20B, 20C,
and 20D having different frequencies may be disposed on the four side surfaces of the damping
layer 19, and further, the same frequency may be used. You may arrange four piezoelectric
elements to have. [Effect of ? of the Invention] As described above, according to the present
invention, since two piezoelectric elements are disposed on at least both surfaces of the damping
layer, multi-functional ultrasound diagnosis can be performed with one probe. Can.
[0002]
Brief description of the drawings
[0003]
1 to 3 show an embodiment of the present invention, FIG. 1 is a general view of an ultrasonic
endoscope, FIG. 2 is a cross-sectional view showing a distal end portion of an insertion portion,
and FIG. 4 and 5 show another embodiment of the present invention, FIG. 4 is a cross-sectional
view showing the tip of the insertion portion, and FIG. 5 is v- of FIG. 2 is a sectional view.
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DESCRIPTION OF SYMBOLS 1 иии Ultrasound endoscope, 2 иии Operation unit, 3 иии insertion unit, 6
иии Probe drive scanning unit, 12 иии ultrasonic transmission / reception unit, 15 иии ultrasonic Probe,
16 ... rotating body, 19 ... damping layer, 20A to 20D ... piezoelectric element, 21 ... acoustic
matching lens. Applicant agent Patent attorney Atsushi Tsuboi First rl! J ?] Fig. 2 Fig. 3 Fig. 4
Fig. 5 Procedure correction book Showa 62. J, -4 Secretary General of Patent Office Black 1) Akio
No. 1, display of case Japanese Patent Application No. 61-270466 2, title of the invention
ultrasonic probe 3, relationship with the case of correction Patent applicant (037 3.) Olympus
Optical Co., Ltd. 4, Agent: Tokyo, Chiyoda-ku, 3-8-2 UBE Building, Content of correction 7 (1) The
name of the invention is corrected as an "ultrasonic probe". (2, Correct the claims as attached. (3)
The present invention as described in the specification, page 1, line 14 relates to The present
invention relates to the improvement of an ultrasound probe used for ultrasound diagnosis and
the like. And correct. (4) The specification, page 3, line 13 to line 14 "The purpose of the purpose
is to provide. ?The purpose of this is to provide an ultrasonic probe that is compact and can
transmit and receive a plurality of ultrasonic waves. And correct. (5) In the present invention,
"The present invention can be transmitted and received" described in page 3, line 20 to page 4,
line 3. In the present invention, by arranging at least two piezoelectric elements on both sides of
the damping layer of the ultrasonic probe and sharing the damping layer, it is possible to
transmit and receive a plurality of ultrasonic waves in a small size. It is possible to obtain an
ultrasonic probe that can be used. And correct. (6) In the specification, page 8, line 1 to line 4, "at
least. By providing at least two piezoelectric elements on both sides of the damping layer and
sharing the damping layer, it is possible to obtain a small-sized ultrasonic probe capable of
transmitting and receiving a plurality of ultrasonic waves. Can perform multi-functional
ultrasound diagnosis. And correct. (7) Correct the drawings in Figure 2 and Figure 5 as attached.
2. An ultrasonic probe characterized in that at least two piezoelectric elements are disposed in
the claims and the damping layer is co-amplified. Applicant's agent Patent attorney ? m ? ? ?
? ? ? ? ? ? ? ? FIG. 2
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