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JP2006101901

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DESCRIPTION JP2006101901
PROBLEM TO BE SOLVED: To provide an ultrasonic probe for body cavity which does not require
a content fluid. SOLUTION: A plurality of vibrators 21 arrayed in two dimensions are fixed to a
casing 7, and first vibrator electrodes 22 are formed on the lower surface of each vibrator 21
respectively. The vibrator 23 is formed. An acoustic lens 12 is formed on the upper surface of the
second transducer electrode 23 via the acoustic matching layer 11, and a first signal electrode
24 is formed on each of the first transducer electrodes 22. A backing material 31 is provided
opposite to the first signal electrode 24, and a plurality of second signal electrodes 32 in contact
with the first signal electrode 24 are provided on the top surface of the backing material 31.
Furthermore, the rotation mechanism 4 which rotates the backing material 31 in the state which
the 1st signal electrode 24 and the 2nd signal electrode 32 were contact | abutted is provided.
[Selected figure] Figure 1
Body cavity ultrasound probe
[0001]
The present invention relates to a body cavity ultrasonic probe used for ultrasonic diagnosis in a
body cavity.
[0002]
An ultrasonic diagnostic apparatus obtains an image such as a tomogram in a living body by
using a method such as an ultrasonic pulse reflection method, and is used in various medical
fields in recent years.
04-05-2019
1
[0003]
By the way, recently, ultrasonic imaging of a tomographic image in an arbitrary cross section
from a body cavity such as transesophagus or transrectal has been performed using a body
cavity ultrasonic probe in which a transmitting / receiving unit is provided rotatably. Patent
Document 1).
[0004]
FIG. 14 is a view showing a schematic configuration of an ultrasonic diagnostic apparatus for
performing ultrasonic imaging by inserting an intracavity ultrasound probe such as
transesophagus and transrectole.
The ultrasonic diagnostic apparatus 100 includes an ultrasonic probe 101 for body cavity that
transmits and receives ultrasonic waves to and from an object, and an ultrasonic probe for
operating the ultrasonic probe 101 for body cavity inserted in the body cavity of the object P. An
ultrasonic diagnostic apparatus main body that transmits / receives ultrasonic waves to / from
the object from the operation unit 102 and the body cavity ultrasonic probe 101, and generates
an ultrasonic image based on an ultrasonic wave reception signal obtained from the body cavity
ultrasonic probe 101 And 103.
[0005]
FIG. 15 is a view showing a schematic configuration of the body cavity ultrasonic probe 101. As
shown in FIG.
The body cavity ultrasonic probe 101 includes a transmitting / receiving unit 110 for
transmitting / receiving an ultrasonic wave to / from the object, a rotating mechanism 140 for
rotating the transmitting / receiving unit 110 in the direction of arrow R1, and a signal
connected to the transmitting / receiving unit 110. Electrically isolates each unit such as
conductor 150, electric signal transmission cable 160 connected to signal conductor 150,
transmission / reception unit 110, rotation mechanism 140, signal conductor 150, and electric
signal transmission cable 160 from the outside, and And a casing 170 for preventing liquid from
entering.
04-05-2019
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[0006]
In addition, the body cavity ultrasonic probe 101 is a seal member such as rubber that prevents
the liquid from entering the casing 170 from the transmitting / receiving unit 110 rotatably
provided, and a seal portion 118 made of a metal material that holds the seal material. Are
electrically insulated from the outside and a propagation portion 119 for propagating ultrasonic
waves.
[0007]
The transmitting and receiving unit 110 includes a transducer unit 120 in which a first
transducer electrode 122 and a second transducer electrode 123 are provided on both surfaces
of the transducer 121 to transmit and receive ultrasonic waves, and the transducer unit 120. It
comprises an ultrasonic matching layer 111 which is bonded and efficiently transmits ultrasonic
waves, and an acoustic lens 112 which is bonded to the ultrasonic matching layer 111 and
focuses the ultrasonic waves.
[0008]
The propagation unit 119 is provided to electrically insulate the seal unit 118 from the outside
for safety to the subject, and the ultrasonic wave emitted from the transmitting / receiving unit
110 and the ultrasonic wave reflected from the subject are It is provided with a content liquid
115 for propagation, and an acoustic window 116 for holding the content liquid and transmitting
and receiving ultrasonic waves to and from the subject in a state of being in contact with the
subject.
[0009]
The rotating mechanism 140 includes a backing material 131 holding the transmitting /
receiving unit 110 on the upper surface, a pulley 141 holding the backing material 131, a
rotation shaft 142 pivotally supporting the pulley 141 rotatably on the casing 170, and a pulley
141 A desired angle range in the direction of arrow R1 is provided with a wire 143 for pivoting.
[0010]
Then, the rotation mechanism 140 is operated from the ultrasonic probe operation unit 102, and
the transmitting and receiving unit 110 of the body cavity ultrasonic probe 101 is slid on the
seal material of the sealing unit 118 and rotated to a desired angle. The ultrasonic imaging of the
subject P at the rotation angle can be performed.
04-05-2019
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Japanese Patent Application Laid-Open No. 6-105842
[0011]
However, in the conventional ultrasonic probe 101 for body cavity, the content liquid from the
sliding part of the seal material of the transmitting / receiving part 110 and the sealing part 118
to the inside of the casing 170 by disinfection or sterilization with reduced pressure, handling
with impact, etc. There is a problem that the outflow of 115 causes the mixture of gas between
the acoustic lens 112 and the acoustic window 116 and the ultrasonic wave can not be
propagated, or that each unit inside the casing 170 is disturbed by the content liquid 115.
[0012]
Further, since transmission and reception of ultrasonic waves are performed via the content
liquid 115 and the acoustic window 116, there is a problem that transmission and reception
efficiency of ultrasonic waves is poor.
[0013]
Furthermore, since components such as the content liquid 115, the acoustic window 116, and
the seal portion 118 are required, the size of the body cavity ultrasonic probe 101 becomes
large, and there is a problem that the subject is burdened.
[0014]
The present invention has been made to solve the above-mentioned problems, and it is an object
of the present invention to provide an ultrasonic probe for body cavity which does not require a
content liquid.
[0015]
In order to solve the above problems, an ultrasonic probe for body cavity of the present invention
according to claim 1 comprises a casing having an opening at its tip, a plurality of transducers
arranged in two dimensions, and one of the transducers. A second vibrator electrode commonly
formed on the main surface, a first vibrator electrode respectively formed on the other principal
surface of the vibrator, and a first signal electrode respectively formed on the first vibrator
electrode A transmitting and receiving unit fitted and fixed to the opening of the casing, and a
plurality of second signal electrodes disposed in the casing facing the transmitting and receiving
unit, the second signal electrode A rotating portion that rotates in a state in which the first signal
electrode of the transmitting and receiving unit abuts, rotating means that is disposed in the
04-05-2019
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casing and that rotates the rotating portion, and is disposed in the casing Supplying an ultrasonic
drive signal to the second signal electrode, and Characterized by comprising an electrical signal
transmitting means for receiving the ultrasonic wave reception signal from.
[0016]
The ultrasound probe for body cavity of the present invention according to claim 2 is commonly
formed on a casing having an opening at the tip, a plurality of transducers arranged in two
dimensions, and one principal surface of the transducer. The casing, the first vibrator electrode
formed on each of the other principal surfaces of the vibrator, and the first signal electrode
formed on the first vibrator electrode. A transmitting and receiving unit fitted and fixed to the
opening of the housing, a rotating unit having a plurality of second signal electrodes on one main
surface disposed opposite to the transmitting and receiving unit in the casing, and in the casing
And the second signal electrode of the pivoting portion is brought into contact with the first
signal electrode of the transmitting / receiving unit at a first pivoting angle, and the pivoting
portion of the pivoting portion at a second pivoting angle. A rotating means for bringing the
second signal electrode into non-contact with the first signal electrode of the transmitting and
receiving unit; and the inside of the casing Is arranged to supply the ultrasound drive signal to
the second signal electrode, and characterized by comprising an electrical signal transmitting
means for receiving the ultrasonic wave reception signal from the second signal electrode.
[0017]
According to the present invention, the vibrator, the acoustic matching layer, and the acoustic
lens of the transmitting and receiving unit are fixed to the casing, and an N-channel signal
electrode is provided on the main surface of the backing material on the transmitting and
receiving side. The backing material is configured to rotate in a state of being in contact with the
electrode.
Therefore, since the content liquid, the acoustic window and the seal portion can be omitted, the
reliability with respect to disinfection and sterilization accompanied by reduced pressure,
handling accompanied by impact and the like can be improved.
In addition, the ultrasonic transmission / reception efficiency can be increased to achieve
miniaturization.
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[0018]
An embodiment of the present invention will be described.
[0019]
Hereinafter, a first embodiment of an ultrasonic probe for body cavity according to the present
invention will be described with reference to FIGS. 1 to 6.
[0020]
FIG. 1 is a view showing the configuration of an ultrasound probe for body cavity according to a
first embodiment of the present invention.
The body cavity ultrasonic probe 10 rotates the transmitting and receiving unit 1 for
transmitting and receiving ultrasonic waves to and from the subject P, the rotating unit 3 that
rotates in a state of being in contact with the transmitting and receiving unit 1, and the rotating
unit 3 And a rotating mechanism 4 for moving.
[0021]
Further, the body cavity ultrasonic probe 10 transmits an ultrasonic wave drive signal from the
ultrasonic diagnostic apparatus main body 103 to the rotation unit 3 and transmits an ultrasonic
wave reception signal from the rotary unit 3 to the ultrasonic diagnosis apparatus main body
103 A conductor 7 and an electric signal transmission cable 6, and a casing 7 for holding units
such as the transmitting / receiving unit 1, the rotation unit 3, the rotation mechanism 4, the
signal conductor 5 and the electric signal transmission cable 6 at predetermined positions There
is.
[0022]
The transmission / reception unit 1 includes a transducer unit 2 for transmitting an ultrasonic
wave and receiving an ultrasonic wave reflected from an object P, an acoustic matching layer 11
for increasing the transmission efficiency of the ultrasonic wave to the transducer unit 2, and
vibration. And an acoustic lens 12 for focusing the ultrasonic waves from the child part 2 toward
the subject P.
[0023]
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FIG. 2 is a perspective view showing an example of the structure of the vibrator portion 2, the
pivoting portion 3 and the pivoting mechanism 4.
The transducer unit 2 transmits and receives a plurality of transducers 21 for converting
ultrasonic waves and electrical energy (electric signals) and an electric signal such as an
ultrasonic wave drive signal or an ultrasonic wave reception signal to each of the transducers 21.
The first transducer electrode 22 and the second transducer electrode 23, and the first signal
electrode 24 for electrically connecting the first transducer electrode 22 and the rotating portion
3 are provided.
[0024]
Each vibrator 21 is made of an electroacoustic transducer such as a piezoelectric ceramic
material or a piezoelectric polymer material, and is arranged in a two-dimensional grid shape to
form an aggregate having a circular surface.
The aggregate of the vibrators 21 is arranged such that its main surface, for example, the upper
surface, is parallel to the inner surface of the acoustic lens 12.
Then, the transducer 21 converts the ultrasonic drive signal from the first transducer electrode
22 and the second transducer electrode 23 into transmitting ultrasonic waves at the time of
ultrasonic wave transmission, and receives ultrasonic waves at the time of ultrasonic wave
reception. Convert to
[0025]
Each of the first vibrator electrode 22 and the second vibrator electrode 23 is made of a
conductive material such as carbon, copper, gold or the like, and the second vibrator electrode
23 has the same shape as the upper surface of the aggregate of the vibrators 21. It is made of
one circular conductive material, and is commonly formed on the upper surface of the vibrator
21 so that all the vibrators 21 have the same potential.
04-05-2019
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The first vibrator electrode 22 has the same shape as the other principal surface of each vibrator
21, for example, the lower surface, and is formed on the lower surface of each vibrator 21 as a
counter electrode of the second vibrator electrode 23. ing.
[0026]
The first transducer electrode 22 and the second transducer electrode 23 supply an ultrasound
driving signal from the ground wire 5b of the first signal electrode 24 and the signal conductor 5
to the transducer 21 at the time of ultrasound transmission, At the time of reception, an
ultrasonic wave reception signal from the vibrator 21 is transmitted to the first signal electrode
24 and the ground line 5b.
[0027]
FIG. 3A is a plan view of the first signal electrode surface 25 of the vibrator unit 2.
The first signal electrode 24 is made of a conductive material such as carbon, copper, gold or the
like, has the same shape as each first vibrator electrode 22, and is formed on each first vibrator
electrode 22.
The aggregate of the first signal electrodes 24 constitutes a first signal electrode surface 25
having the same circular surface as the lower surface of the vibrator 21.
The first signal electrode 24 may be formed on the lower surface of the vibrator 21 instead of
the first vibrator electrode 22.
In this case, the first signal electrode 24 becomes the first vibrator electrode 22.
[0028]
The acoustic matching layer 11 is formed in a planar circular shape, and one surface thereof, for
example, the lower surface is joined to the second transducer electrode 23 of the transducer
04-05-2019
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portion 2.
The acoustic matching layer 11 is provided to efficiently transmit ultrasonic waves to the
transducer unit 2.
[0029]
The acoustic lens 12 is made of silicone rubber or the like which propagates ultrasonic waves
well and has high electrical insulation, is formed in a circular shape, and is joined to the other
surface of the acoustic matching layer 11, for example, the upper surface.
The acoustic lens 12 is provided to set the focus in the slice direction of the transmission
ultrasonic wave from the transducer 21 according to the shape of the material, the curvature,
etc., and the surface of the acoustic lens 12 contacts the subject P during ultrasonic imaging. The
ultrasonic waves are transmitted and received.
[0030]
The transmission / reception unit 1 is fitted and fixed to a circular opening 7 a provided on the
side surface of the tip of the cylindrical casing 7.
That is, the side surfaces of the transducer portion 2, the acoustic matching layer 11, and the
acoustic lens 12 are fixed to the side walls of the opening 7a.
[0031]
The rotation unit 3 is disposed to face the transmission / reception unit 1 inside the casing 7 and
is rotatably abutted on the lower surface of the transmission / reception unit 1.
The pivoting portion 3 is formed in a circular columnar body and is fixed to the backing material
31 which is pivoted and one principal surface of the backing material 31, for example, the upper
04-05-2019
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surface, and the first signal electrode of the vibrator portion 2 And a second signal electrode 32
for making electrical contact with the electrode 24.
[0032]
The backing material 31 is provided to fix the second signal electrode 32 and to absorb
ultrasonic waves from the transducer unit 2 to suppress unnecessary vibration.
[0033]
FIG. 3B is a plan view of the second signal electrode surface 33 of the rotation unit 3.
The second signal electrodes 32 are formed in a stripe shape from a conductive material such as
carbon, copper, gold or the like, and N (N-channel) arrays are arranged on the upper surface of
the backing material 31 at equal intervals in one dimension. The assembly of the two signal
electrodes 32 constitutes a second signal electrode surface 33 having a circle having the same
diameter as the circular surface formed by the first signal electrodes 24 of the vibrator unit 2.
The second signal electrode surface 33 is parallel to the first signal electrode surface 25 of the
vibrator unit 2, and the second signal electrode 32 is in contact with the first signal electrode 24
of the vibrator unit 2. Conduction is performed.
[0034]
Here, as shown in FIG. 4, the distance W between the second signal electrodes 32 is such that the
first signal electrodes 24 straddle the adjacent second signal electrodes 32 even if the rotating
portion 3 rotates. It is set to be longer than the length D of the longest diagonal of the first signal
electrode 24 so as not to conduct.
[0035]
The signal conductor 5 is formed of a flexible printed circuit (hereinafter referred to as an FPC
board) having the signal line 5a and the ground line 5b, and the like, and the side of the signal
conductor 5 is a side surface of the backing material 31 when the pivoting portion 3 pivots. A
part of the tip of the signal conductor 5 is fixed to the side surface of the backing material 31 in
a state where the signal conductor 5 is loosened so that the signal conductor 5 is wound.
04-05-2019
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Further, each signal conductor 5 a of the signal conductor 5 is connected to the N-channel
second signal electrode 32, and the ground wire 5 b is connected to the second vibrator
electrode 23 of the vibrator unit 2.
[0036]
The rotating mechanism 4 is pivotally supported by a pulley 41 fixed to the lower surface of the
backing member 31 and the casing 7 so as to be rotatable, and is wound around a rotating shaft
42 for holding the pulley 41 and the pulley 41. The wire 43 for rotating in the desired range in
the direction and the backing material 31 are pressed in the direction of the arrow L2 to bring
the second signal electrode 32 of the rotating portion 3 into contact with the first signal
electrode 24 of the vibrator portion 2 And a pressure unit 44 of
[0037]
The pressurizing unit 44 is made of an elastic body such as a spring, a plate spring, or rubber,
and one end thereof is fixed to the casing 7 and the other end is slidably in contact with the
pulley 41.
[0038]
The turning mechanism 4 can turn in the R1 direction in a state in which the turning portion 3 is
pressed in the L2 direction by the operation of the wire 43 from the ultrasonic probe operation
unit 102 in the L1 direction.
[0039]
One end of each transmission line in the electric signal transmission cable 6 is connected to the
N-channel signal conductor 5 a and the ground line 5 b of the signal conductor 5, and the other
end is connected to the ultrasonic diagnostic apparatus main body 103.
[0040]
The casing 7 is formed in a cylindrical shape whose front end is closed, and has a circular
opening 7a on the side surface of the front end.
The transmitting / receiving unit 1 is fixed to the opening 7 a of the casing 7, and the rotating
04-05-2019
11
unit 3, the rotating mechanism 4, the signal conductor 5, and the electric signal transmission
cable 6 are stored inside.
[0041]
Next, ultrasonic imaging by the body cavity ultrasonic probe 10 having the above-described
structure will be described with reference to FIGS. 5 and 6.
[0042]
FIG. 5 does not rotate the rotation portion 3, that is, at the rotation angle 0, the rotation shown in
FIG. 3B on the first signal electrode surface 25 of the vibrator portion 2 shown in FIG. 3A. FIG. 7
is a view showing a state of the first signal electrode surface 25 when the second signal electrode
surface 33 of the moving unit 3 is in contact with the second signal electrode surface 33;
[0043]
In the case where the rotation portion 3 is not rotated, that is, when the rotation angle is 0, as
shown in FIG. 5, in the second signal electrode surface 33, the second signal electrodes 32 in the
stripe shape are vertically oriented. Is abutted against the first signal electrode surface 25.
In the first signal electrodes 24, only the portions of the first signal electrodes 24 corresponding
to the stripe-shaped second signal electrodes 32 directed in the vertical direction are in contact
with the second signal electrodes 32, and between the second signal electrodes 32. The first
signal electrode portion 24 does not contact the second signal electrode 32.
[0044]
That is, the contact portion 50 (hereinafter simply referred to as an electrode contact portion) of
both electrodes of the first signal electrode 24 and the second signal electrode 32 has an
electrode pattern as shown in FIG. Signal transmission / reception is performed, and transmission
/ reception of the electric signal is not performed except the electrode contact portion 50.
[0045]
Therefore, at the time of ultrasonic wave transmission, an ultrasonic wave drive signal from the
ultrasonic diagnostic apparatus main body 103 is transmitted through the electric signal
transmission cable 6, the signal conductor 5, the second signal electrode 32 and the electrode
04-05-2019
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contact portion 50 to the electrode contact portion The transducer 21 (hereinafter referred to as
a corresponding transducer portion) corresponding to 50 is supplied, and ultrasonic waves are
transmitted / received to / from the object P by scanning of the ultrasonic waves from the
corresponding transducer 21 portion.
[0046]
Further, the ultrasonic wave reception signal from the corresponding vibrator 21 portion is
transmitted to the ultrasonic diagnostic apparatus main body 103 via the rotation unit 3, the
signal conductor 5 and the electric signal cable 6.
The ultrasonic diagnostic apparatus main body 103 that has received the ultrasonic wave
reception signal can extract a tomographic image of the subject P in the scan direction at the
rotation angle 0.
[0047]
FIG. 6 shows a first example in which the second signal electrode surface 33 of the rotating
portion 3 is brought into contact with the first signal electrode surface 25 of the vibrator portion
2 by rotating the rotating portion 3 by an angle θ in the R2 direction FIG. 6 is a diagram
showing the state of the signal electrode surface 25.
[0048]
When the rotating portion 3 is rotated in the R2 direction by an angle θ, as shown in FIG. 6, in
the second signal electrode surface 33, each stripe-shaped second signal electrode 32 is inclined
by an angle θ in the R2 direction. The first signal electrode surface 25 is abutted in the state.
Then, only the portion of the first signal electrode 24 corresponding to the inclined second signal
electrode 32 contacts the second signal electrode 32, and does not contact the other portion of
the first signal electrode 24 between the second signal electrodes 32.
[0049]
That is, the electrode contact portion 50 between the first signal electrode 24 and the second
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signal electrode 32 has an electrode pattern as shown in FIG. 6, and transmission and reception
of electric signals are performed only at this electrode contact portion 50. Other than the above,
transmission and reception of electric signals are not performed.
[0050]
Therefore, at the time of ultrasonic wave transmission, the ultrasonic wave drive signal from the
ultrasonic diagnostic apparatus main body 103 is transmitted through the electric signal
transmission cable 6, the signal conductor 5, the second signal electrode 32, and the inclined
electrode contact portion 50. The ultrasonic waves are supplied to the corresponding transducer
21 corresponding to the contact portion 50, and ultrasonic waves are transmitted / received to /
from the object P by the ultrasonic scan from the corresponding transducer 21.
[0051]
Further, the ultrasonic wave reception signal from the corresponding vibrator 21 portion is
transmitted to the ultrasonic diagnostic apparatus main body 103 via the rotation unit 3, the
signal conductor 5 and the electric signal cable 6.
The ultrasonic diagnostic apparatus main body 103 that has received the ultrasonic wave
reception signal can extract a tomographic image of the subject P in the scan direction when the
rotation unit 3 is rotated by the angle θ.
[0052]
According to the first embodiment of the present invention described above, the vibrator of the
transmitting and receiving unit, the acoustic matching layer, and the acoustic lens are fixed to the
casing, and the main surface of the transmitting and receiving unit side of the backing material of
the rotating unit is N channel A signal electrode is provided, and the backing material is
configured to be rotated in a state in which the signal electrode is in contact with the transducer
electrode, and ultrasonic imaging of the subject at a desired angle is performed by rotating the
rotating portion. be able to.
[0053]
Moreover, since the transmitting and receiving unit to be brought into contact with the subject is
fixed to the casing and is not rotated, the sealing unit, the content liquid and the acoustic window
can be omitted, and the reliability against disinfection and sterilization accompanied by
04-05-2019
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decompression and impact etc. is improved. , Ultrasonic transmission and reception efficiency
can be increased.
[0054]
In addition, since the ultrasonic probe can be miniaturized, the burden on the subject can be
reduced.
[0055]
Second Embodiment An ultrasonic probe for body cavity according to a second embodiment of
the present invention will be described below with reference to FIGS.
The configuration and the like of the ultrasonic probe of the present embodiment are the same as
those of the first embodiment, and thus are omitted. The structure of the transducer portion
different from that of the first embodiment will be described with reference to FIG.
[0056]
FIG. 7 shows the structure of a transducer section 2a according to a second embodiment of the
present invention. This transducer section 2a is a transducer 21a for converting an ultrasonic
wave and an electric signal, and a transducer 21a. It comprises a first transducer electrode 22a
and a second transducer electrode 23 for exchanging electrical signals, and a first signal
electrode 24a for electrically conducting between the first transducer electrode 22a and the
rotating portion 3 Ru.
[0057]
FIG. 8A is a plan view showing the structure of the vibrator 21a and the first signal electrode
24a. The vibrator 21a is two-dimensionally arranged to form an aggregate having a circular
surface.
That is, the plurality of transducers 21a are arranged in a configuration equally divided by a
plurality of radiations C emitted at a desired angle from the center B of each of two adjacent
concentric circles A among the plurality of concentric circles A.
04-05-2019
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The aggregate of the transducers 21 a is disposed such that the upper surface thereof is parallel
to the lower surface of the acoustic lens 12.
[0058]
The second vibrator electrode 23 is formed of a single circular conductive member having the
same shape as the top surface of the assembly of the vibrator 21a, and is common to the top
surface of the vibrator 21a so that all the vibrators 21a have the same potential. The acoustic
lens 12 is bonded onto the second transducer electrode 23 via the acoustic matching layer 11.
[0059]
The first vibrator electrode 22a has the same shape as the lower surface of each vibrator 21a,
and is formed on the lower surface of each vibrator 21a as a counter electrode of the second
vibrator electrode 23.
[0060]
The first signal electrodes 24a have the same shape as the first transducer electrodes 22a, and
are formed on the respective first transducer electrodes 22a.
The assembly of the first signal electrodes 24a constitutes a first signal electrode surface 25
having the same circular surface as the assembly of the lower surface of the vibrator 21a.
That is, as shown in FIG. 8A, as in the configuration of the assembly of the transducers 21a, the
plurality of first signal electrodes 24a are concentric for every two adjacent concentric circles A
among the plurality of concentric circles A. It is configured to be equally divided by a plurality of
radiations C emitted from the center B at a desired angle.
[0061]
The first signal electrode 24a may be formed on the lower surface of the vibrator 21a instead of
the first vibrator electrode 22a.
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In this case, the first signal electrode 24a becomes the first transducer electrode 22a.
[0062]
FIG. 8B is a plan view of the second signal electrode surface 33 of the rotation unit 3.
Similar to the example of the first embodiment, the second signal electrode surface 33 is
configured and arranged from the second signal electrodes 32 having stripe shapes of 12
channels arranged in one dimension at equal intervals.
[0063]
Here, as shown in FIG. 9, the distance W between the second signal electrodes 32 is conductive
across the second signal electrodes 32 where the first signal electrodes 24a are adjacent even if
the pivoting portion 3 pivots. In order not to do so, it is set to be longer than the longest diagonal
length D1 of the first signal electrode 24a.
[0064]
In FIG. 10, the first signal electrode surface 25 of the vibrator portion 2a shown in FIG. 8A does
not rotate, that is, at the rotation angle 0, the third portion of the rotation portion 3 shown in FIG.
It is the figure which showed the state of the 1st signal electrode surface 25 at the time of
making the 2 signal electrode surface 33 contact | abut.
[0065]
When the rotation portion 3 is not rotated, that is, when the second signal electrode surface 33 is
brought into contact with the first signal electrode surface 25 at a rotation angle 0, stripes
extending in the vertical direction of the second signal electrode surface 33 are formed. The
electrode contact portion 60 of both electrodes in contact with each second signal electrode 32
and the first signal electrode 24a has an electrode pattern as shown in FIG.
[0066]
In the electrode contact portion 60, the electrode pattern shown in FIG. 10 is inclined at an angle
θ in the R2 direction when the rotating portion 3 is rotated at the angle θ in the R2 direction. It
04-05-2019
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has an electrode pattern similar to that of the case.
[0067]
Therefore, if ultrasonic imaging is performed in a contact state between the second signal
electrode surface and the first signal electrode surface as shown in FIG. 10, a tomographic image
of the subject P in the scanning direction at the rotation angle 0 is extracted By rotating the
rotation unit 3 in the arrow R1 direction, it is possible to extract a tomographic image of the
subject P in the scan direction at the angle 0.
[0068]
According to the second embodiment of the present invention described above, since the first
signal electrodes, the vibrator electrodes, and the vibrators are radially arranged in point
symmetry, in addition to having the same effect as the first embodiment. It is possible to extract a
tomographic image that hardly causes a difference due to the rotation angle of the rotation unit.
[0069]
Hereinafter, an ultrasonic probe for body cavity according to a third embodiment of the present
invention will be described with reference to FIGS. 11 and 13. FIG.
In the description of the ultrasonic probe for body cavity of the present embodiment, the
description of the same components as in the first embodiment is omitted, and different
components will be mainly described.
[0070]
First, the body cavity ultrasonic probe 10a of the present embodiment is characterized in that the
fixed guide 70 and the pivoting guide 71 are further disposed between the pulley 41 and the
pressure unit 44 of the first embodiment.
[0071]
The fixed guide 70 is disposed below the pulley 41 so as to be separated from the pulley 41 and
parallel to the rotational surface of the pulley 41, and one end of the fixed guide 70 is held by the
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casing 7.
Further, a hole is formed in the central portion of the fixed guide 70, and the rotation shaft 35 is
loosely fitted in this hole.
Furthermore, on the periphery of the lower surface of the fixed guide 70 opposite to the pulley
41, there are provided a large number of convex portions 72 arranged at desired intervals on a
circular track (not shown).
[0072]
The rotation guide 71 is disposed below and in parallel with the fixed guide 70.
And the rotation guide 71 is being fixed to the rotation shaft 42 which penetrates the center part.
Further, as shown in FIG. 12, on the periphery of the upper surface of the rotation guide 71
opposite to the lower surface of the fixed guide 70, a large number of recessed portions 73
engaged with the convex portions 72 of the fixed guide 70 are provided.
[0073]
The large number of recesses 73 are disposed on a circular orbit D corresponding to the circular
orbit D of the fixed guide 70 with a desired spacing.
The places where the convex portions 72 and the concave portions 73 are formed may be
reversed.
That is, the convex portion 72 may be provided on the rotation guide 71 and the concave portion
73 may be provided on the fixed guide 70.
04-05-2019
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[0074]
Then, at the position where the concave portion 73 of the rotational guide 71 and the convex
portion 72 of the fixed guide 70 are engaged by the rotational movement in the R1 direction in
the rotational mechanism 4, as shown in FIG. By moving in the arrow direction L2 indicated by
the solid line, the second signal electrode 32 of the rotation unit 3 and the first signal electrode
24 of the vibrator unit 2 are in contact with each other.
On the other hand, at a position where the concave portion 73 of the rotary guide 71 and the
convex portion 72 of the fixed guide 70 do not engage, as shown in FIG. 13, the rotary guide 71
moves in the arrow direction L3 shown by the solid line The second signal electrode 32 of the
moving unit 3 and the first signal electrode 24 of the vibrator unit 2 are not in contact with each
other and are in close proximity to each other.
[0075]
According to the third embodiment of the present invention described above, in addition to the
same effect as the first embodiment, the first signal electrode and the second signal can be
obtained by the engagement of the concave portion of the rotation guide and the convex portion
of the fixed guide. Since the electrodes are abutted at a desired rotation angle, the wear of the
first signal electrode and the second signal electrode can be reduced, and the reliability of the
ultrasonic probe can be improved.
[0076]
The figure which shows the structure of the ultrasonic probe for body cavities which concerns on
Example 1 of this invention.
FIG. 2 is a view showing the structure of a vibrator unit and a rotating unit according to a first
embodiment of the present invention.
FIG. 3 is a view showing a first signal electrode surface and a second signal electrode surface
according to Embodiment 1 of the present invention.
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The figure which shows the relationship between the distance between the 2nd signal electrodes
concerning Example 1 of this invention, and the length of the diagonal of a 1st signal electrode.
The figure which shows the state of the contact surface of the vibrator | oscillator part and
rotation part which concern on Example 1 of this invention.
The figure which shows the relationship between the distance between the 2nd signal electrodes
concerning Example 1 of this invention, and the length of the diagonal of a 1st signal electrode.
The figure which shows the structure of one part to the vibrator | oscillator part and rotation
part which concern on Example 2 of this invention. The figure which shows the 1st signal
electrode surface and 2nd signal electrode surface which concern on Example 2 of this invention.
The figure which shows the relationship between the distance between the 2nd signal electrodes
concerning Example 2 of this invention, and the length of the diagonal of a 1st signal electrode.
The figure which shows the state of the contact surface of the vibrator | oscillator part and
rotation part which concern on Example 2 of this invention. The figure which shows the structure
of the ultrasound probe for body cavities concerning Example 3 of this invention. The figure
which shows the rotation guide which concerns on Example 3 of this invention. The figure which
shows the proximity | contact state of the vibrator | oscillator part and rotation part which
concern on Example 3 of this invention. The figure which shows the structure of a common
ultrasound diagnosing device. The figure which shows the structure of the conventional
ultrasound probe for body cavities.
Explanation of sign
[0077]
P Subject 1 Transmitter / Receiver 2 Vibrator 3 Pivot 4 Pivot Mechanism 5 Signal Conductor 6
Electrical Signal Transmission Cable 7 Casing 7a Opening 10 Ultrasonic Probe for Body Cavity
11 Acoustic Matching Layer 12 Acoustic Lens 21 Vibrator 22 Vibrator electrode 23 second
vibrator electrode 24 first signal electrode 31 backing material 32 second signal electrode 41
pulley 42 rotational shaft 43 wire 44 pressure portion 70 fixed guide 71 rotational guide 72
convex portion 73 concave portion
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