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DESCRIPTION JP2001104327

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DESCRIPTION JP2001104327
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
applicator for an ultrasonic therapeutic apparatus, which is applied to an ultrasonic therapeutic
apparatus for performing treatment by irradiating ultrasonic waves to a site to be treated.
[0002]
2. Description of the Related Art As a prior art, there is known a technique capable of heating a
region to be treated in an ultrasonic wave irradiated area by irradiating continuous ultrasonic
waves. As means for generating these ultrasonic waves, for example, a piezoelectric method using
a piezo element, an electromagnetic conversion method, etc. have been used.
[0003]
It is known to apply these conventional techniques to, for example, an ultrasonic therapeutic
apparatus, and a therapeutic ultrasonic wave generated from an external source of a patient to be
treated with an ultrasonic source is a treatment target site in the body. And a configuration for
irradiating the diseased tissue and the like.
[0004]
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In addition, by providing focusing means for focusing the ultrasonic waves to be irradiated in the
above-mentioned ultrasonic treatment apparatus, it is possible to focus on the intended site, and
focus the ultrasonic waves on the lesion area to be treated. The thing is done.
The focusing of the ultrasound causes a temperature rise due to the concentration of the
ultrasound energy at the focal point. Since the temperature of the treatment site can be
instantaneously heated to 80 ° C. or more by this temperature rise, it is possible to treat a lesion
such as a tumor with tissue degeneration.
[0005]
For such treatment, a transducer for generating an ultrasonic wave, an ultrasonic wave
propagation medium for transmitting an ultrasonic wave to perform close contact with the
subject, and an ultrasonic wave for observing the treatment target site of the subject An
applicator for an ultrasonic treatment apparatus configured of an ultrasonic probe or the like for
obtaining a tomogram (hereinafter referred to as an ultrasonic applicator). Ultrasound treatment
device is used. The ultrasound applicator is used in intimate contact with a subject, and can
transmit therapeutic ultrasound to a treatment target site.
[0006]
In addition, an ultrasound probe for observing a treatment target site of a subject is disposed in
the ultrasound applicator. The ultrasonic probe is capable of obtaining an ultrasonic tomographic
image effective for confirming the progress of treatment of the treatment target region, the state
of the change of the tissue, the confirmation of the irradiation target region, and the like. The
ultrasound probe is disposed at the apex of the spherical shell shaped transducer to obtain
focused ultrasound, and can render an ultrasound tomographic image in the vicinity of the focal
point of the focused ultrasound located immediately below.
[0007]
Using this ultrasound probe, first, the site to be treated is observed with the ultrasound probe to
observe the site where the therapeutic ultrasound waves are focused. This observation is not only
performed before the irradiation of therapeutic ultrasound, but also observes a change during
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irradiation, or observes a change in a treatment target site after irradiation. Based on this
observation, the progress of the treatment and determination of the future treatment plan are
performed.
[0008]
[Problems to be Solved by the Invention] When ultrasonic treatment is performed using the
above-mentioned ultrasonic applicator, the treatment medical ultrasonic wave is being irradiated,
except for focusing focused on the site to be treated. It is also irradiated to the ultrasonic probe
for treatment target site observation. This irradiation is not intended, for example, a component
in which the therapeutic ultrasonic wave is reflected back to the body surface of the subject, or
air bubbles between the body surface resulting from the lack of adhesion of the ultrasonic
applicator. It is what is reflected and returned.
[0009]
Due to these various factors, the reflected therapeutic ultrasonic waves are focused mainly on the
tip of the ultrasonic probe for observation. Since the ultrasound probe is disposed at the central
portion of the transducer for generating the therapeutic ultrasound to delineate the treatment
target site, the tip portion of the ultrasound probe just corresponds to that of the reflected
therapeutic ultrasound. It is because it is located near the focal point. As a result, the distal end
portion of the ultrasonic probe rises in temperature, which affects the ultrasonic transducer for
image depiction stored in the distal end portion of the ultrasonic probe, and a desired ultrasonic
tomographic image can be obtained. It will not be possible.
[0010]
In view of this point, it is an object of the present invention to provide a stable and reliable
applicator for an ultrasonic treatment apparatus capable of obtaining a favorable ultrasonic
tomographic image even during irradiation of therapeutic ultrasonic waves. Do.
[0011]
[Means for Solving the Problems] In order to solve the above problems, in the present invention
according to claim 1, an ultrasonic probe having an ultrasonic tomogram for observing a region
to be treated can be obtained. In an applicator for an ultrasonic treatment apparatus, the
ultrasonic probe is disposed at a position separated by a predetermined distance on a vibrator
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from a center line of the therapeutic ultrasonic wave. It is a solution.
[0012]
In the second aspect of the present invention, the ultrasonic probe is disposed at a position
where the center line of focusing of the therapeutic ultrasonic wave and the center line of the
field of view of the ultrasonic probe are parallel to each other. A solution is provided by the
applicator for an ultrasonic treatment apparatus according to claim 1 characterized by
[0013]
In this way, since the ultrasonic probe for obtaining the ultrasonic tomographic image can be
separated from the vicinity of the focal position of the reflected therapeutic ultrasonic waves, the
ultrasonic tomography can be stabilized at the time of the irradiation of the therapeutic
ultrasonic waves. An ultrasound applicator can be provided to obtain an image.
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram for explaining
a first embodiment of the present invention.
[0015]
An ultrasonic applicator 10 according to a first embodiment of the present invention includes a
vibrator 1 for generating therapeutic ultrasonic waves, and an application for propagating
therapeutic ultrasonic waves while in close contact with a body surface of a subject. An ultrasonic
wave propagation medium 3 which is held by the applicator film 2 and propagates a therapeutic
sound wave, an ultrasonic probe 4 for obtaining an ultrasonic tomographic image of a treatment
target site, and the ultrasonic wave probe A holding means 5 held at a predetermined position, a
base member 8 for supporting by incorporating the vibrator 1, a drive circuit 7 for driving the
vibrator 1, and a system controller for controlling the operation of the entire ultrasonic treatment
apparatus It consists of six.
[0016]
The ultrasound probe 4 is connected to a system controller 6, and the system controller 6
controls the operation of the entire ultrasound treatment apparatus, and at the same time,
instructions from the operator are input, and image information etc. necessary for the operator
are providing.
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When the operator brings the ultrasonic applicator 10 into contact with the subject, the
applicator film 2 adheres closely to the body surface of the subject and the like.
This close contact is realized by processing the applicator film 2 into a film shape exhibiting
flexibility by using a material such as rubber.
The material of the applicator film 2 is selected to be also excellent in ultrasonic wave
permeability, and for example, those obtained by processing silicone rubber into a film shape are
often used.
Moreover, it is also possible to use a material having hardness that does not have flexibility, for
example, and for example, it is also possible to form a resin material having excellent sound
permeability into a thin plate and apply it.
[0017]
The ultrasound propagation medium 3 is provided to propagate the therapeutic ultrasound
generated by the transducer 1 to the body surface.
Water is generally used for this ultrasonic wave propagation medium 3 because of its ease, and is
generally selected from the ultrasonic wave propagation characteristics, chemical stability, cost,
and ease of acquisition and maintenance.
The ultrasonic wave propagation medium 3 propagates the ultrasonic wave for image
visualization from the ultrasonic probe 4 in addition to the ultrasonic wave for treatment. The
image display ultrasonic wave is transmitted from the ultrasonic wave probe 4, and the reflected
ultrasonic wave reflected again is received, and signal processing is performed by ultrasonic
wave signal processing means (not shown) included in the system controller 6, and then the
image monitor etc. It provides an operator with an ultrasonic tomographic image.
[0018]
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The ultrasonic probe 4 is held by the holding means 5 at a predetermined distance from the
center line L 1 of the vibrator 1. The ultrasonic probe 4 can be arranged at a predetermined
distance from the center line L1 of the vibrator 1 to prevent an unintended increase in
temperature of the tip portion of the ultrasonic probe 4. When the therapeutic ultrasound is
directed toward the subject, the temperature rise causes a large portion of the therapeutic
ultrasound to be focused to connect the focal point f1 to the treatment target site in the subject.
However, there is a considerable amount of reflection and return of the therapeutic ultrasound
from the body surface, and the reflected therapeutic ultrasound has a spherical shell-shaped
center on the center line L1 of the transducer 1. It often converges in the vicinity.
[0019]
In the vicinity of the focused focal point of the reflected therapeutic ultrasonic waves,
concentration of ultrasonic energy occurs and a temperature rise occurs. When the ultrasonic
probe 4 is positioned at this position, a temperature rise occurs at the tip portion etc., and in
order to avoid this, the ultrasonic probe 4 is held by the holding means 5 and separated from the
center line L1 of the transducer 1 Placed in the This distance is determined in consideration of
the field of view of the ultrasound probe 4 and whether the region to be treated and the focal
point f1 sufficiently enter the observation field of view.
[0020]
Further, although the holding means 5 holds the ultrasonic probe 4 at a predetermined position
of the vibrator 1, the holding means 5 can be configured so that movement control can be
performed by the system controller 6. In this case, it moves from above the center line 1 during
irradiation of therapeutic ultrasonic waves in conjunction with the irradiation of therapeutic
ultrasonic waves, and moves the ultrasonic probe 4 onto the central line L1 when irradiation is
not performed. You may do so. This movement is not along the spherical shell-like arc of the
transducer 1 but is performed in parallel so that the center line L2 of the image of the ultrasonic
probe 4 and the center line L1 of the transducer 1 maintain parallel. It is possible to prevent the
site to be treated on the acoustic tomogram from being lost or causing confusion in the positional
relationship.
[0021]
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FIG. 2 is a schematic view for explaining an ultrasonic therapeutic apparatus according to a
second embodiment of the present invention.
[0022]
The arrangement angle of the ultrasonic probe 4 of the configuration of the ultrasonic treatment
apparatus shown in FIG. 2 is different from that of the first embodiment of the present invention
previously shown in FIG.
Due to the difference in the arrangement angle, the shape of the holding means 9 is different
from that of the holding means 5 of FIG. According to the arrangement of the ultrasonic probe 4
according to the second embodiment, the tip portion of the ultrasonic probe 4 can be separated
from the therapeutic ultrasonic wave which is reflected from the body surface or the like and
refocused. It does not change. However, the field of view of the ultrasonic tomographic image
that can be obtained by the ultrasonic probe 4 is different, and the center line of the ultrasonic
probe 4 forms an angle θ with respect to the center line L1 of the transducer 1.
[0023]
The ultrasonic tomogram obtained by the ultrasonic probe 4 depicts a treatment target portion in
which the focal point f1 is superimposed on the center line of the image. Although this visualized
ultrasonic tomogram is an image from an oblique direction at an angle θ with respect to the
center line l1 of the therapeutic ultrasonic wave, the obtained ultrasonic tomogram can be fully
utilized as treatment observation information, and at the same time Since there is no concern
about the heating of the tip portion of the ultrasonic probe 4, it is possible to observe the
treatment target site during irradiation of the therapeutic ultrasonic wave.
[0024]
FIG. 3 shows a first appearance of an ultrasonic applicator to which the first or second
embodiment of the present invention is applied.
[0025]
The ultrasonic applicator 11 includes a transducer housing portion 12 housing a transducer of
ultrasonic waves for treatment, an ultrasonic wave propagation medium, and the like, and an
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ultrasonic probe 13 for imaging an ultrasonic tomographic image of a region to be treated. And
the applicator film 28 for intimate contact with the body surface of the subject to improve the
propagation of the therapeutic ultrasonic waves, the slide portion 14 gripped at the time of
operation, and the bendable angle at which the slide portion 14 can be easily grasped It
comprises a foldable fulcrum 15 which can be supported.
[0026]
The ultrasonic probe 13 is disposed such that the image center line L3 for drawing an ultrasonic
tomographic image is parallel to the center line L1 of the therapeutic ultrasonic wave.
Alternatively, although not shown, the image center line L3 may be disposed at a predetermined
angle with respect to the center line L1.
By thus separating from the center line L1, the tip portion of the ultrasonic probe 13 by the
reflected therapeutic ultrasonic wave is not heated. The longitudinal main body of the ultrasonic
probe 13 is disposed in a direction perpendicular to the center line L1, whereby the dimension in
the thickness direction of the ultrasonic applicator 11 can be reduced.
[0027]
In addition, since it can be bent within the range of a predetermined angle with the foldable
fulcrum 15 as a center, the operability for holding can be further improved. For example, this
inflection moves as shown by arrow h in the figure. The slide part 14 is provided on the rear side
of the main body device of the foldable fulcrum, and the slide part 14 is movable along the
longitudinal direction of the ultrasonic probe 13 as shown by the arrow k in the figure. . Thereby,
the length of the grip portion can be freely adjusted.
[0028]
These configurations are effective, for example, when the ultrasonic applicator 11 is used
intraoperatively. By arranging the ultrasonic probe 13 in a direction substantially orthogonal to
the center line L1, the thickness of the transducer housing 12 is reduced, and thus, an operation
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for entering a narrow portion such as a liver surface existing under a rib or the like. Easy to do.
By appropriately adjusting the movable range of the fulcrum 15 and the slide portion 14 with
respect to the operation at this narrow site, it is possible to make good contact with the desired
site to be treated, and thus accurate and safe ultrasonic treatment Can be implemented.
[0029]
FIG. 4 shows a second appearance of an ultrasonic applicator to which the first or second
embodiment of the present invention is applied. (A) is a bird's-eye view of the ultrasonic
applicator 16, and (b) is an overhead view.
[0030]
The ultrasonic applicator 16 is in close contact with the body surface with the transducer
housing portion 17 in which a transducer for generating therapeutic ultrasonic waves, an
ultrasonic wave propagation medium, an ultrasonic probe and the like are stored. Applicator film
18 that propagates and transmits sound waves well, gripping portion 20 gripped at the time of
operation, connection cable 21 drawn out from this gripping portion 20 and connected to the
main body of the ultrasonic treatment apparatus, gripping The portion 20 is composed of a
fulcrum 19 supported and connected so as to be movable relative to the vibrator accommodating
portion 17.
[0031]
The gripping portion 20 moves with respect to the vibrator housing portion 17 with the fulcrum
19 as a fulcrum as shown in FIG.
This movement can be moved from side to side as indicated by the arrow n in the figure, and the
position indicated by P is suitable, for example, for a right-handed operator to grip and operate.
Further, the position indicated by Q in the figure is suitable for gripping by a left-handed
operator or the like. Further, as shown by the arrow m in FIG. 6A, the gripping portion 20 can be
bent in the vertical direction with the fulcrum 19 as its center, so that gripping and operation
with higher freedom are possible.
[0032]
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FIG. 5 shows a third appearance of an ultrasonic applicator to which the first or second
embodiment of the present invention is applied.
[0033]
The ultrasound applicator 22 includes the components necessary for ultrasound treatment such
as a transducer and an ultrasound propagation medium (not shown).
The ultrasonic applicator 22 has a mounting portion 26. In the case of the present embodiment,
the mounting portion 26 is provided with a female screw. An external thread provided in the grip
portion is screwed into the internal thread to complete the bonding. The male screw 27 is
provided regardless of the shape of the grip portion.
[0034]
Since ultrasonic tomograms that intersect at this predetermined angle can be obtained, for
example, if a treatment target site is drawn on the intersection axis of this intersection, the
operator can easily obtain a three-dimensional view of the treatment target from these two cross
sections. You can understand the shape and structure. By being able to grasp this threedimensional structure, accurate positioning and accurate ultrasonic irradiation can be performed.
[0035]
The arrangement angle of the ultrasonic probes 29 and 30 can be more preferably threedimensionally grasped by the arrangement at 90 degrees. Further, although the ultrasonic
probes 29 and 30 are disposed in an inclined manner in FIG. 6, they may of course be disposed
perpendicularly to the body surface.
[0036]
In addition, the holding part 31 is detachable with respect to the coupling 32, and is performed
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by operating the attachment / detachment means 33. For this purpose, the grip 32 can be
released to allow the coupling 32 to enter a narrow treatment target area, or by changing the
shape of the grip 31 to various other shapes, more accurate and easy treatment It is possible to
perform irradiation of ultrasonic waves.
[0037]
As described above, according to the applicator for an ultrasonic therapeutic apparatus of the
present invention, as described in the embodiment of the present invention, for example, it is
reflected from the body surface or the like of the subject during irradiation of therapeutic
ultrasonic waves. The ultrasound probe for image observation can be released from the
temperature rise in the vicinity of the focal point where the therapeutic ultrasound waves come
back. For this reason, since it is possible to escape from the unintended heating of the distal end
portion of the ultrasonic probe, it is possible to prevent the occurrence of a defect in the image
forming ultrasonic transducer arranged at the distal end portion.
[0038]
In addition, since heating of the tip portion of the ultrasonic probe does not occur, it is possible
to stably observe an ultrasonic tomographic image of a treatment target even during irradiation
of therapeutic ultrasonic waves, and ultrasonic treatment while observing the progress Can
proceed.
[0039]
In addition, since the ultrasonic probe can be placed away from the unintended focal point where
the therapeutic ultrasonic waves are reflected, the shape of the ultrasonic applicator can be
freely designed according to the purpose of use, etc. An applicator for an ultrasound treatment
device having a shape can be provided.
[0040]
In addition, since a plurality of ultrasonic probes can be provided, ultrasonic tomographic images
of two cross sections of the treatment target site can be obtained, and it becomes easy to threedimensionally grasp the treatment target site.
[0041]
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The embodiments described above are described to facilitate understanding of the present
invention, and are not described to limit the present invention.
Therefore, each element disclosed in the above embodiment is intended to include all design
changes and equivalents that fall within the technical scope of the present invention.
[0042]
According to the present invention, a stable ultrasonic tomographic image can be obtained
regardless of irradiation / non-irradiation of therapeutic ultrasonic waves, and an ultrasonic
applicator with high reliability and good operability. Can provide an ultrasonic therapeutic
apparatus comprising the
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