JPS6395042A - Ultrasonic crushing apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ultrasonic fragmentation device, in particular, to non-invasively irradiate powerful ultrasonic waves from outside the subject to the affected area to accurately destroy stones and tumor tissue. This invention relates to an ultrasonic crushing device for crushing.

[Prior Art] A crushing device that crushes stones or relatively hard tissues using powerful ultrasonic waves is well known, and is used to crush stones such as ureteral stones, bladder stones, etc. in living body ducts and remove them outside the living body. will be held. In addition, powerful ultrasound is applied to brain tumors, liver tumors, ascites tumors, etc., and destroys tumor tissue at the cellular level to achieve an effect similar to cauterization.

This type of ultrasonic disintegration device uses X-ray CT (computed tomography) to determine the target location of the affected area before irradiating powerful ultrasound. I'm looking for accuracy.

[Problems to be solved by the invention] However, as mentioned above, it is extremely uneconomical to use an X-ray CT system that is separate from the ultrasonic fragmentation device.
Furthermore, since it is relatively difficult to accurately align the positional relationship between the two, there is a problem in that accurate irradiation to the affected area cannot be performed.

Considering the effect on other tissues in ultrasonic crushing equipment, it is necessary to accurately aim at the target location of the affected area and to precisely focus the powerful ultrasound to only the stones, etc., making aiming easy. A device that can do this is desired.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems.
The purpose is to provide an ultrasonic crushing device that can be easily and accurately positioned using an integrated device without using a separate device.

[Means and effects for solving the problems] In order to achieve the above object, the present invention provides an ultrasonic crushing device that crushes stones and tumor tissue using powerful ultrasonic waves focused on the affected area. In order to position the main transducer, a positioning transducer for transmitting and receiving ultrasonic waves for image display is provided on the focal axis of the main transducer for irradiating intense ultrasonic waves.

According to this configuration, since the positioning transducer and the main transducer are on the same axis, it is possible to easily align the focal position of the high-intensity ultrasound with the affected area within the subject displayed as an image, and the affected area can be easily aligned. Accurate irradiation is possible.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

Figure 1 shows the schematic configuration of the ultrasonic crushing device.
A main transducer 12 that generates powerful ultrasonic waves is provided within the positioning irradiation unit 10 . The main transducer 12 consists of a single hemispherical vibrator, and the focal point P of the irradiated ultrasonic waves is determined by the curvature of the sphere.

The main transducer 12 is controlled for irradiation by a control signal from the main body 14, and the irradiation unit 10 is moved to match the focal point P of the subject 16, and the main transducer 12 irradiates the affected area with powerful ultrasonic waves. Note that degassed water 1 is provided between the subject 16 and the main transducer 12.
Both are set so that 7 is interposed between the two, thereby enabling good transmission of powerful ultrasonic waves.

A feature of the present invention is that aiming position alignment is easily performed on the basis of ultrasound-formed images, and for this purpose a positioning transducer 18 is provided for displaying images within the subject 16.

This positioning transducer 18 is provided so that its center position is on the focal axis 100 of the main transducer 12, and is attached to the bottom of the hemispherical shape at the center position of the main transducer 12 by hollowing out that part. This positioning transducer 18 is B in the embodiment.
This is an ultrasonic transducer for modes, and multiple transducers are arranged. Therefore, this positioning transducer 18 is formed separately from the main transducer 12 described above, and cannot be shared by the same vibrator.

For example, strong ultrasound has a sound pressure intensity of 1kW/cm2 and is IM
Hz ultrasonic waves are used, while ultrasonic waves for displaying the image carrier are extremely weak and do not affect the subject, and 3 to 4 MHz ultrasonic waves are used.

According to the positioning transducer 18, a B-mode tomographic image of a predetermined area within the subject 16 can be obtained by supplying excitation signals with predetermined delay times to a plurality of transducers. will be displayed on the 14 displays 20 of the main body of the apparatus, for example, as shown in FIG.

A marker 200 indicating the focal position of the powerful ultrasonic wave is displayed on this screen, and this marker 200 is a point that is a distance 1 (focal length) from the bottom center point 0 of the main transducer 12 to the focal point P. will be displayed. Therefore, by aligning this marker 200 with the position of the affected area of the subject 16, the irradiation position of the intense ultrasound waves is determined.

According to the present invention, the error between the focus position of the main transducer 12 indicated by the marker 200 and the actual affected area position can be made extremely small, and the error is about ±1 mm, so even small stone tumor tissues can be Even if there is, you can aim accurately.

[Effects of the Invention] As explained above, according to the present invention, the positioning transducer is disposed on the focal axis of high-intensity ultrasound and is integrated with the high-intensity ultrasound generator, so that the positioning transducer is placed on the focal axis of high-intensity ultrasound and is integrated with the high-intensity ultrasound generator. The focus position of powerful ultrasound waves can be precisely adjusted,
Non-invasive surgery on the affected area can be successfully performed.

Furthermore, since the positioning device is integrated with the crushing device, there is an advantage that alignment can be quickly performed with simple operations without using a device such as XfiCT as in the conventional method.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a schematic configuration of an ultrasonic crushing device according to the present invention, and FIG. 2 is an explanatory diagram showing a display state of the present invention on a display of the device main body. 10... Positioning irradiation unit 12... Main transducer 14... Device main body 18... Positioning transducer 20...
Display device 100... Focal axis 200... Marker.

Claims (2)

[Claims] (1) In an ultrasonic crushing device that crushes stones and tumor tissue using powerful ultrasonic waves focused on the affected area, a positioning transducer that transmits and receives ultrasonic waves for image display is used to position the main transducer. An ultrasonic crushing device characterized by being installed on the focal axis of a main transducer for irradiating powerful ultrasonic waves. (2) The ultrasonic crushing device according to claim (1), wherein the main transducer has a substantially hemispherical shape, and a positioning transducer is incorporated in the bottom of the hemisphere.