JP2001170068A - Ultrasonic treatment instrument - Google Patents

Ultrasonic treatment instrument

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Publication number
JP2001170068A
JP2001170068A JP2000315798A JP2000315798A JP2001170068A JP 2001170068 A JP2001170068 A JP 2001170068A JP 2000315798 A JP2000315798 A JP 2000315798A JP 2000315798 A JP2000315798 A JP 2000315798A JP 2001170068 A JP2001170068 A JP 2001170068A
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Japan
Prior art keywords
ultrasonic
heating
ultrasound
warming
treatment
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Pending
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JP2000315798A
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Japanese (ja)
Inventor
Satoshi Aida
Katsuhiko Fujimoto
聡 相田
克彦 藤本
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Toshiba Corp
株式会社東芝
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Priority to JP2000315798A priority Critical patent/JP2001170068A/en
Publication of JP2001170068A publication Critical patent/JP2001170068A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic treatment instrument performing the lithotrity or the treatment by warming/heating by an integrated instrument. SOLUTION: This ultrasonic treatment instrument is provided with a drive circuit for the lithotrity for generating a drive voltage for irradiation of a shock wave for the lithotrity and a drive circuit for warming/heating generating the drive voltage for irradiation of the ultrasonic wave for warming/heating. The treatment is performed by selecting the device circuit according to respective treatment modes. A lithotrity device and a warming/heating treatment device are integrated so as to save a space for the device and the cost.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、ピエゾ素子を用いて体外から超音波を照射して体内の悪性腫瘍を局所的に加温・加熱して治療を行う超音波治療装置に関する。 The present invention relates to relates to an ultrasonic therapy apparatus for performing treatment by locally heating and heating malignant tumors in the body is irradiated with ultrasonic waves from outside the body using a piezoelectric element.

【0002】 [0002]

【従来の技術】近年、腎結石や胆石等の結石を治療するために、超音波による衝撃波を体外から照射し、無侵襲的に結石を破砕する結石破砕装置が実用に供されている。 In recent years, for the treatment of calculi such as kidney stones and gallstones, the shock waves caused by ultrasonic waves irradiated from the outside, non-invasive manner lithotriptor to crush the stone has been put to practical use. このような結石破砕装置の衝撃波源としては、水中放電、電磁誘導、微小爆発、及びピエゾ素子を用いる方法等が提案されている。 The shockwave source of such lithotripsy, water discharge, electromagnetic induction, micro explosion, and a method using a piezoelectric element have been proposed. 特にピエゾ素子を用いる方法は、消耗品がない、衝撃波強度を任意にコントロールできる、複数のピエゾ素子にかける駆動波形を位相制御することにより焦点位置をコントロールできる、など優れた特徴を有している(特開昭60−145131、US In particular, the method of using a piezoelectric element, there are no consumables, the shock wave intensity can be arbitrarily controlled, and a plurality of driving waveforms applied to the piezoelectric element can be controlled focus position by the phase control, the excellent characteristics such as (JP-A-60-145131, US
P−4526168)。 P-4526168). また、特開昭62−42773 In addition, JP-A-62-42773
号公報に記載されているように、駆動波形を位相制御することによって焦点形状を変えることも可能となっている。 No. As described in JP, it has become possible by changing the focal shape by phase control of the drive waveform.

【0003】また一方では、悪性新生物、いわゆる癌の治療方法として、放射線療法や薬物療法に変わって、腫瘍組織を体温より高い42〜45℃に加温することにより腫瘍組織を壊死させる加温治療法(ハイパーサーミアともいう)が注目されるようになってきた。 [0003] On the other hand, the malignant neoplasms, as a treatment method of so-called cancer, changes in radiation therapy or drug therapy, tumor tissue pressure to necrotic tumor tissue temperature by heating to higher than 42 to 45 ° C. body temperature therapy (also called hyperthermia) has come to be noted.

【0004】加温治療法は、腫瘍組織が正常組織に比べて熱感受性が高く42.5℃以上で死滅する作用がある事を利用したもので、腫瘍部位を42.5℃以上に加温・維持する事で治療を行なうものである。 [0004] warming therapy, utilizes the fact that tumor tissue an effect of killing at least 42.5 ° C. higher thermal sensitivity compared to normal tissues, the tumor site than 42.5 ° C. warming - is intended to carry out the treatment by maintaining. この際、体内の腫瘍部位を加温する方法として、RF帯やマイクロ波帯の電磁波を照射する方法と、超音波による機械エネルギーを利用する方法とがある。 In this case, as a method for heating the body of the tumor site, and a method of irradiating electromagnetic waves in the RF band or microwave band, and a method of utilizing the mechanical energy by ultrasound. このうち、電磁波による加温では生体の電気的特性から深部の局所を選択的に加温することは困難であるが、超音波による加温は超音波ビームの集束性と、到達深度が深いという特徴から深部の局所を加温できる利点があり、大いに注目されている。 Among them, although heating by electromagnetic waves is difficult to selectively warm the local deep from the electrical characteristics of a living body, heating with ultrasonic waves and focusing of the ultrasound beam, penetration depth is called deep There is an advantage of heating the local deep from the feature are much attention.

【0005】また昨今では、文献「G.Vallanc [0005] In recent years, the literature "G.Vallanc
ien,et al. ien, et al. ,Progress in Ur , Progress in Ur
ology 1991,1,84−88」に示されるように、上記の加温治療法を更に一歩進めて、腫瘍部分を80℃以上に加熱し、悪性腫瘍組織を焼き殺して治療する全く新しい治療法も報告されている。 ology 1991,1,84-88 As shown in "promoting warming therapy method one step further above, the tumor portion was heated to 80 ° C. or higher, completely new therapies to treat kill baked malignant tumor tissue It has also been reported.

【0006】 [0006]

【発明が解決しようとする課題】このように、従来の上記各治療法においては、破砕領域もしくは加温領域(又は加熱領域)は一意に設定されて行われていたため、治療効率の面においては好ましいものではなかった。 BRIEF Problem to be Solved] Thus, in the conventional above treatment method, the crushed region or heated region (or heating region) has been performed is uniquely set, in terms of treatment efficiency the preferred was not.

【0007】この発明はこのような従来の課題を解決するためになされたもので、その目的とするところは、治療効率を向上させることができる超音波治療装置を提供することにある。 [0007] The present invention has been made to solve such conventional problems, and an object is to provide an ultrasonic treatment apparatus capable of improving the treatment efficiency.

【0008】 [0008]

【課題を解決するための手段】上記課題を解決するために請求項1に記載の本発明によれば、患者体内の患部に局所的に超音波を照射する超音波源と、該患部近傍を撮影する超音波画像診断装置とを有し、該超音波画像診断装置により撮影された超音波画像を観察して患部位置を認識し、該患部位置に前記超音波源から超音波を照射して患部を加温・加熱治療する超音波治療装置において、 According To solve the above problems SUMMARY OF THE INVENTION The present invention as set forth in claim 1, an ultrasonic source for irradiating locally ultrasound to the affected area of ​​the patient, near the patient unit and an ultrasound imaging apparatus for capturing, to recognize the affected area position by observing the ultrasound images taken by ultrasonic diagnostic imaging apparatus, wherein by irradiating ultrasonic wave from the ultrasonic source to the patient part position in ultrasonic therapy apparatus for warming and heating treating the affected area,
前記超音波源による照射領域を操作することができる照射部位制御手段を備え、前記患部を含む近傍を加温した後に該患部を加熱して治療可能なことを特徴とする超音波治療装置をもって解決手段とする。 Wherein with an irradiation site control means capable of operating the irradiated region by the ultrasound source, solved with a ultrasonic treatment apparatus characterized by treatable by heating the patient unit after was warmed including and neighboring the affected area and means.

【0009】また、請求項2に記載の本発明によれば、 Further, according to the present invention described in claim 2,
患者体内の患部に局所的に超音波を照射する超音波源と、該患部近傍を撮影する超音波画像診断装置とを有し、該超音波画像診断装置により撮影された超音波画像を観察して患部位置を認識し、該患部位置に前記超音波源から超音波を照射して患部を加温・加熱治療する超音波治療装置において前記超音波源による照射領域を操作することができる照射領域制御手段と、前記照射領域制御手段による制御内容に応じた前記超音波の音場を画面表示できる音場表示手段とを備え、前記照射領域の操作に伴って画面表示された前記音場の切換えが可能なことを特徴とする超音波治療装置をもって解決手段とする。 It has an ultrasonic source for irradiating locally ultrasound to the affected area of ​​the patient, and an ultrasound imaging apparatus for capturing a near patient unit, observing the ultrasound images taken by ultrasonic diagnostic imaging apparatus irradiation area to recognize the position of an affected part, it is possible to operate the irradiated region by the ultrasound source in the ultrasonic therapy apparatus for warming and heating treatment of the affected part is irradiated with ultrasonic waves from the ultrasonic source to the patient part position Te control means and the corresponding to the control by the irradiation area control means and a sound field display means capable screen displays an ultrasonic sound field, switching of the sound field displayed on the screen along with the operation of the irradiation area the ultrasonic therapy device with a SOLUTION, wherein it is possible.

【0010】 [0010]

【発明の実施の形態】以下、本発明の実施の形態を図面に基づいて説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention with reference to the accompanying drawings. 図1は本発明が適用された超音波治療装置の第1の実施の形態の構成を示すブロック図である。 Figure 1 is a block diagram showing a configuration of a first embodiment of the ultrasonic treatment apparatus to which the present invention is applied.

【0011】同図において、超音波発生源であるピエゾ素子1は、複数のピエゾ素子群を超音波送信面が凹面をなすように球殻状に配列したものであり、可とう性の水袋2を介して患者3とカップリングされている。 [0011] In the figure, the piezoelectric element 1 is an ultrasonic source is a plurality of piezoelectric element group which ultrasonic transmission surface is arranged in a spherical shell shape to form a concave, flexible water bag are patient 3 coupled via the 2. また、 Also,
該ピエゾ素子の中心部位には患者3の超音波画像を撮影するための超音波プローブ7が付設されており、このプローブ7は超音波診断装置8に接続されている。 The central portion of the piezoelectric element are attached ultrasonic probe 7 for taking ultrasound images of the patient 3, the probe 7 is connected to the ultrasonic diagnostic apparatus 8.

【0012】駆動回路4は、ピエゾ素子を駆動して患者3の体内に存在する患部21に超音波を照射させるものであり、制御回路5の制御下で動作する。 [0012] driving circuit 4 drives the piezoelectric element is intended to irradiate ultrasonic waves to the affected area 21 that exists in the patient's body 3, operating under control of the control circuit 5.

【0013】治療モード切換スイッチ6は、結石破砕モード、加温モード、及び加熱モードを選択するものである。 [0013] Treatment mode switch 6 is for selecting lithotripsy mode, heating mode, and the heating mode.

【0014】制御回路5は、選択された治療モードに応じて駆動回路4の出力を制御する。 The control circuit 5 controls the output of the driving circuit 4 according to the selected treatment mode. 即ち、治療モードが結石破砕モードである場合には、衝撃波を発生させるためのトリガを出力し、治療モードが加温・加熱モードの場合には一定電圧のバースト信号を連続的に出力する。 That is, the treatment mode is the case of the lithotripsy mode outputs a trigger for generating the shock wave treatment mode is outputted continuously burst signal of a fixed voltage in the case of the warming-heating mode.
また、設定された治療モードにおける幾何学的焦点、音場領域、及び加温・加熱領域を求め、これらの情報をディジタルスキャンコンバータ9(以下、DSCという) Further, the geometrical focus in the set treated mode, the sound field area, and obtains the warming-heating area, the information digital scan converter 9 (hereinafter, referred to as DSC)
に出力する。 And outputs it to.

【0015】DSC9は、超音波画像診断装置8で生成された超音波画像上に、現在の治療モード情報や、幾何学的焦点位置、音場領域、及び加温・加熱領域等を重畳するものであり、重畳された画像はCRT10に表示される。 [0015] DSC9 is the ultrasound system on the generated ultrasound image with 8, superimposes and current treatment mode information, the geometrical focal position, the sound field area, and the warming-heating area, etc. , and the superimposed image is displayed on CRT 10.

【0016】このような構成によれば、治療モード切換スイッチ6にて、結石破砕モード、加温モード、及び加熱モードのうち所望する治療モードを選択することにより、ピエゾ素子1から出力される超音波が制御される。 According to this structure, in the treatment mode switch 6, lithotripsy mode, heating mode, and by selecting the desired therapeutic mode of heating mode, super output from the piezoelectric element 1 sound wave is controlled.
つまり、結石破砕モードの際には患部21に衝撃波を与えるべき超音波が出力され、加温・加熱モードの際には患部21をを加温・加熱して死滅させるべき超音波が出力される。 That is, when the lithotripsy mode is output ultrasound to give a shock wave to the affected area 21, the ultrasonic waves are output to kill by warming and heating the affected part 21 at the time of warming-heating mode .

【0017】従って、操作者は、治療モード切換スイッチ6を切換えるだけで、容易に治療モードを切換えることができるようになる。 [0017] Thus, the operator need only switch the therapeutic mode switch 6, it is possible to switch easily therapy mode.

【0018】図2は、CRT10に表示される画面の例を示す説明図であり、結石破砕モードに設定されている状態を示している。 [0018] FIG. 2 is an explanatory view showing an example of a screen displayed on the CRT 10, and shows a state set in the lithotripsy mode. 同図において、超音波画像27上には幾何学的焦点28、及び衝撃波音場29とが表示され、衝撃波の照射される位置が直ちに認識できるようになっている。 In the figure, on the ultrasonic image 27 is displayed and the geometrical focus 28, and the shock wave sound field 29, a position to be irradiated of the shock wave is adapted to be recognized immediately. また、背景画面26の表示色を、例えば、 In addition, the display color of the background screen 26, for example,
結石破砕モードの際には「青」、加温モードの際には「赤」、そして、加熱モードの際には「黄」と区別すれば、現在設定されている治療モードをまちがえることはない。 At the time of lithotripsy mode is "blue", "red" at the time of the heating mode, and, if the distinction at the time of the heating mode and the "yellow", there is no possibility that mistake a treatment mode that is currently set . つまり、例えば、結石破砕モードと加温モードとをまちがえて、悪性腫瘍を治療する際に結石破砕用の衝撃波を照射してしまうと、人体に大きな損傷を与えてしまうので、このようなトラブルの発生しないように、背景画像26の色を区別しているのである。 That is, for example, the wrong and lithotripsy mode and heating mode, thereby irradiating a shock wave for lithotripsy in treating malignant tumors, since would have a significant damage to the human body, such troubles so as not to generate, with each other to distinguish the color of the background image 26.

【0019】また、図3に示すように、超音波画像27 Further, as shown in FIG. 3, the ultrasound image 27
上の任意の位置に現在モードを示す文字や記号30を表示しても良い。 At any position of the upper may be displayed characters or symbols 30 indicating the current mode.

【0020】また、結石破砕時の衝撃波はほぼアプリケータの幾何学的焦点と実際の衝撃焦点とが一致するが、 [0020] In addition, the shock wave at the time of lithotripsy is almost the actual impact focus and geometric focus of the applicator to match,
加温・加熱モードに照射する超音波は、生体組織による散乱、吸収のために、実際に加温、加熱される位置(領域)が幾何学的焦点よりも手前となる。 Ultrasonic waves irradiating the warming-heating mode, scattering by biological tissue, due to absorption, indeed warming, the position to be heated (region) is short of the geometrical focus. 更には加温モードでは生体組織の熱吸収だけでなく、焦点周囲の血流による冷却効果も起こると考えられるので焦点形状が幾何学的な計算によるものとは異なることがあり、かつ、治療領域も42〜45℃の温度を一定時間持続する必要があるために周囲組織の熱伝導によって加熱領域は衝撃波焦点領域や加熱領域に比べて大きくなると考えられる。 Furthermore not only the heat absorption of the living tissue in the warming mode, may differ from those because it is believed to occur even cooling effect by the focus around the blood flow focus shape by geometrical calculation, and the treated area heating region by the heat conduction of the surrounding tissue to temperature is a need to last a certain time even 42 to 45 ° C. is considered to be larger than the shock wave focal region and the heating region.
また、加熱モードに於いても高熱による組織の熱変成の影響も考慮する必要があると考えられるので、加温・加熱モードの際には図3に示すように、加温領域31(又は加熱領域)が幾何学的焦点28よりも手前に来るように表示する。 Moreover, since even in a heating mode the influence of the thermal metamorphic tissue by high heat would be required to consider, when warming-heating mode as shown in FIG. 3, the heating region 31 (or heating region) displays to come in front of the geometric focal point 28. これによって、操作者は正確な加温領域(又は加熱領域)を知ることができる。 Thus, the operator can know the exact warming region (or heating region).

【0021】なお、上記の加温領域、加熱領域は、焦点位置や形状等を流体方程式や生体の熱吸収係数等の演算およびパラメータにより近似的に計算することで求めることができ、これらの計算は図1に示す制御回路5にて行なわれる。 [0021] The above heating region, the heating region can be determined by calculating approximately the focal position, shape, etc. by the operation and parameters, such as thermal absorption coefficient of the fluid equations and biological, these calculations It is performed by the control circuit 5 shown in FIG.

【0022】このようにして、本実施の形態によれば、 [0022] Thus, according to this embodiment,
結石破砕装置と加温・加熱装置とを一体化して構成することができ、また、治療モード切換スイッチ6により、 Can be constructed by integrating a lithotripsy and warming-heating apparatus, and by treating the mode changeover switch 6,
容易に治療モードを切換えることができる。 It can be switched easily treated mode. また、現在設定されている治療モードが、操作者にわかり易く表示されるので、治療モードを誤ることはない。 Moreover, treatment mode that is currently set, because it is displayed clearly to the operator, never wrong treatment mode.

【0023】図4は本発明の第2の実施の形態の構成を示すブロック図である。 [0023] FIG. 4 is a block diagram showing a configuration of a second embodiment of the present invention. この例では、各治療モード毎に別個の駆動回路11,12,13を設け、各駆動回路の出力は制御回路5の制御下で動作する駆動回路切換スイッチ14によって選択され、ピエゾ素子1に供給される。 In this example, a separate drive circuit 11, 12 and 13 for each treatment mode, the output of each driver circuit is selected by the drive circuit change-over switch 14 which operates under the control of the control circuit 5, supplied to the piezoelectric element 1 It is.

【0024】このような構成においても、前記した第1 [0024] Also in this configuration, the previously described 1
の実施の形態と同様に結石破砕装置と加温・加熱治療装置との一体化を図ることができる。 It can be similar to the embodiment achieving integration of the calculus crushing apparatus and heating and thermal treatment apparatus.

【0025】図5は本発明の第3の実施の形態の構成を示すブロック図である。 FIG. 5 is a block diagram showing a configuration of a third embodiment of the present invention. 同図に示すように、この例では、駆動回路に電源を供給する電源回路15と、結石破砕用のトリガパルスを出力する結石破砕用トリガパルス発生回路17と、加温・加熱用トリガパルスを出力する加温・加熱用トリガパルス発生回路18と、該加温・加熱用トリガパルス発生回路の出力時間を制御するゲーティング回路19、及び、各発生回路17,18の出力を切換えて駆動回路4へ供給するトリガパルス切換スイッチ16を有している。 As shown in the figure, in this example, a power supply circuit 15 supplies power to the drive circuit, a calculus crushing trigger pulse generating circuit 17 for outputting a trigger pulse for lithotripsy, the warming-heating trigger pulse the warming-heating trigger pulse generating circuit 18 for outputting, gating circuit 19 for controlling the output time of the pressurized temperature-heating trigger pulse generating circuit, and the drive circuit switches the output of the generator circuits 17 and 18 and a trigger pulse changeover switch 16 supplies to 4.

【0026】以下、図6、図7に示すパルスシーケンスを参照しながら、第3の実施の形態の動作について説明する。 [0026] Hereinafter, FIG. 6, with reference to the pulse sequence shown in FIG. 7, the operation of the third embodiment.

【0027】いま、治療モード切換スイッチ6にて結石破砕モードを選択すると、制御回路5は結石破砕用トリガパルス発生回路17に出力使令を与えるとともに、トリガパルス切換スイッチ16を結石破砕用トリガパルス発生回路17側に切換える。 [0027] Now, selecting lithotripsy mode in the treatment mode changeover switch 6, the control circuit 5 with providing an output Shirei the lithotripsy for trigger pulse generating circuit 17, a trigger pulse for lithotripsy a trigger pulse changeover switch 16 It switched to the generation circuit 17 side. これによって、結石破砕用トリガパルス発生回路17は、図6(a)に示す如く、 Thus, lithotripsy for trigger pulse generating circuit 17, as shown in FIG. 6 (a),
0(手動)〜数十[Hz]のトリガパルスを駆動回路4 0 (manual) to several tens of drive circuits trigger pulses [Hz] 4
へ出力する。 To output to. そして、駆動回路4は、同図(b)に示すように、供給されたトリガパルスに同期した駆動電圧を発生し、ピエゾ素子1に供給する。 Then, the drive circuit 4, as shown in FIG. (B), and generates a driving voltage synchronized with the supplied trigger pulse supplied to the piezo element 1. その結果、患部21 As a result, the affected area 21
に衝撃波が照射されるのである。 Is the shock wave is irradiated to.

【0028】また、図5に示す治療モード切換スイッチ6にて、加温・加熱モードを選択すると、制御回路5は結石破砕用トリガパルス発生回路17、及び加温・加熱用トリガパルス発生回路18に出力指令を与えるとともに、トリガパルス切換スイッチ16を加温・加熱用トリガパルス発生回路18側に切換える。 Further, in the treatment mode switch 6 shown in FIG. 5, selecting the warming-heating mode, the control circuit 5 lithotripsy for trigger pulse generating circuit 17, and heated and heating trigger pulse generating circuit 18 together provide an output command to switch the trigger pulse changeover switch 16 to the warming-heating trigger pulse generating circuit 18 side. そして、結石破砕用トリガパルス発生回路17が図7(c)に示す如くのトリガパルスを出力すると、ゲーティング回路19は、 When the calculus crushing trigger pulse generating circuit 17 outputs a trigger pulse as shown in FIG. 7 (c), the gating circuit 19,
同図(d)に示すように前記トリガパルスに同期して所定時間ゲーティングを行なう。 Performing a predetermined time gating in synchronization with the trigger pulse as shown in FIG. (D). また、加温・加熱用トリガパルス発生回路18は、同図(e)に示すようにゲーティングされている期間だけ高周波パルスを発生し、駆動回路4へ出力する。 Furthermore, warming-heating trigger pulse generating circuit 18, a high-frequency pulse generated by a period which is gated as shown in FIG. (E), and outputs to the drive circuit 4.

【0029】その後、駆動回路4では同図(f)に示すように高周波パルスが与えられる度にピエゾ素子1を一定電圧でバースト/連続駆動させ、腫瘍をハイパーサーミア温度、もしくは80℃以上の高温にすることで死滅させる。 [0029] Thereafter, burst / continuous driving at a constant voltage of the piezoelectric element 1 whenever the high frequency pulse as shown in the driving circuit 4 FIG (f) is given, tumor hyperthermia temperature, or 80 ° C. or more high temperature kill by. こうして、結石や悪性腫瘍を治療することができるのである。 In this way, it is possible to treat the stones and malignant tumor.

【0030】こうようにして、第3の実施の形態においても、結石破砕装置と加温・加熱治療装置との一体化が可能となり、また、容易に治療モードを切換えることができるので、装置の汎用性が向上し、低コスト化、省スペース化を図ることができる。 [0030] In the Koyo, even in the third embodiment, it is possible to integrate the lithotriptor and warming-heating treatment apparatus, also, it is possible to switch easily treatment mode, the device versatility is improved, cost reduction, it is possible to save space.

【0031】また、図5において、例えば加温・加熱モードで駆動しているときに電源電圧が非常に高くなると、焦点部位の圧力及び温度が高圧・高温になり治療患者が非常に危険な状況となる可能性もあり、更には駆動素子の規格ワット数を超えて素子が壊れてしまう事も考えられる。 Further, in FIG. 5, for example, when the power supply voltage becomes very high when driving with warming and heating mode, treated patients is very dangerous situation pressure and temperature of the focal site is the high pressure and high temperature There is also likely to be, furthermore conceivable that will break the element exceeds the standard wattage of the driving element. このような状況を防止するために加温・加熱モード使用時には制御回路5からの信号により、電源回路15をある一定以上の電圧が出ないようにリミッタ信号S1をかけている。 The signal from the control circuit 5 at the time of warming-heating mode used to prevent this situation, a voltage above a certain level in the power circuit 15 is multiplied by a limiter signal S1 so as not to.

【0032】図8は本発明の第4の実施の形態の構成を示すブロック図である。 [0032] FIG. 8 is a block diagram showing the configuration of a fourth embodiment of the present invention. この例では、アニュラタイプのピエゾ素子1を用いて所望する部位に超音波を照射している。 In this example, the irradiation with ultrasonic waves at a site desired by using a piezoelectric element 1 of Anyurataipu. 従って、複数の駆動回路4〜4の駆動タイミングを複数のディレイ回路32〜32にて制御することで、 Thus, by controlling the driving timings of a plurality of drive circuits 4-4 by a plurality of delay circuits 32 to 32,
アプリケータを移動させずに焦点位置や音場、加温・加熱領域を操作することができる。 It can be manipulated focal position and a sound field, the warming-heating area without moving the applicator. そして、この操作はモード切換スイッチ33にて行なうことができる。 Then, this operation can be performed by the mode change-over switch 33. なお、 It should be noted that,
この遅延時間制御による焦点位置の移動操作は、「US Operation of moving the focus position by the delay time control, "US
P−4526168」に詳説されている。 It is detailed in P-4526168 ".

【0033】第4の実施の形態ではこの技術を利用して、例えば結石破砕モードでは、予め記憶した広音場モードのデータを基に各ディレイ回路32〜32の駆動遅延量を計算し、これに従って各駆動回路4〜4を駆動させることで、焦点音場を広くする。 [0033] In the fourth embodiment by using this technique, for example in lithotripsy mode, the drive delay amount of each delay circuit 32-32 is calculated based on the data of Hirooto field mode previously stored, which by driving the respective drive circuit 4 to 4 according to widen the focus sound field. つまり、図10 In other words, as shown in FIG. 10
(a)に示すように、超音波画像27上に映し出された結石35に幾何学的焦点28を合わせ、この周辺に広域の衝撃波音場29を設定して分割破砕を促進させる。 (A), the the calculus 35 displayed on the ultrasonic image 27 combined geometric focus 28, to promote the division crushed by setting the wide of the shock wave sound field 29 in the neighborhood. または、各ディレイ回路32〜32の遅延量を制御して、 Or, by controlling the delay amount of each delay circuit 32-32,
図11に示すように結石35が幾何学的焦点28を見込む角度の中に完全に入るように焦点28を10〜20 Focus 28 as stones 35 falls completely within the angle anticipating geometrically focus 28, as shown in FIG. 11 10-20
[mm]奥側に入れて結石を最も効率良く破砕できる領域37に入れるようにすることで、結石35全体にエネルギーを与え、分割破砕を促進させることもできる。 [Mm] Put the back side by a take into region 37 that can most efficiently crush the stones, energizing the entire stone 35, the split fracture can be accelerated.

【0034】その後、予め記憶されている狭音場モードのデータを基に駆動遅延量を計算し、この計算結果に従って各駆動回路4〜4を駆動させて、図10(b)に示す如くの狭い衝撃波音場29を生成し、破砕を行なう。 [0034] Then, to calculate the data driving delay amount based on the Semaon field mode stored in advance, by driving the respective driving circuits 4-4 according to this calculation result, the as shown in FIG. 10 (b) to generate a narrow shock wave sound field 29, carry out the crushing.
これによって大きな破片が細かい破片に破砕され、治療効率が向上する。 This large pieces are crushed into small pieces by the treatment efficiency is improved.

【0035】また、これと同様に加温モードの際においても、図12(a)に示すように、まず広い加温領域3 Further, even when the similar thereto warming mode, as shown in FIG. 12 (a), first a wide heating area 3
1を設定して患部の周辺を加温し、その後、同図(b) Warmed near the affected part by setting 1, then, FIG. (B)
に示すように加温領域31を狭くした後加熱し、患部組織を死滅させる。 Heated after narrowing the heated region 31 as shown in, kill diseased tissue. これによって、治療効率を向上させることができる。 Thereby, it is possible to improve the treatment efficiency.

【0036】また、これと同時に各振動子のディレーから焦点位置や音場を演算回路により計算し、広音場モード・狭音場モードとしてDSCを介してCRT上に表示することもできる。 [0036] Also, at the calculated by each transducer operational circuit the focal position and the sound field from the delay simultaneously, may be displayed on the CRT through the DSC as Hirootojo mode Semaon field mode. 更に破砕モード・加温モード・加熱モードのそれぞれに対して適した超音波音場を実現し、 Further to achieve ultrasonic field suitable for each of the crushing mode warming mode heating mode,
CRT上に例えば破砕モードでは焦点は小さく、加温モードではある程度広く、加熱モードでは非常に小さくとそれぞれのモード、目的に合致した表示を行うディレー信号データをメモリに記憶しておき、モード切り換えと同時にDSCを介して制御信号を送る事で表示を切換えることも可能である。 Focus is small in on the CRT for example crushing mode, somewhat wider in the heating mode, very small and each mode in the heating mode, stores the delay signal data to be displayed that matches the purpose in a memory, and a mode switching it is also possible to switch the display by sending a control signal via the DSC simultaneously.

【0037】なお、図8に示す例ではピエゾ素子1として、アニュラタイプのものを使用したが、図9に示すような2次元アレイタイプのものを使用しても良い。 [0037] As the piezoelectric element 1 in the example shown in FIG. 8, but was used in Anyurataipu, it may be used a two-dimensional array type as shown in FIG.

【0038】 [0038]

【発明の効果】以上説明したように、本発明によれば治療効率を向上させることができる超音波治療装置を提供することができる。 As described in the foregoing, according to the present invention it is possible to improve the treatment efficiency can be provided an ultrasonic therapeutic apparatus.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明が適用された超音波治療装置の第1の実施の形態の構成を示すブロック図である。 1 is a block diagram showing a configuration of a first embodiment of the ultrasonic treatment apparatus to which the present invention is applied.

【図2】結石破砕モード時の超音波画像を示す説明図である。 FIG. 2 is an explanatory view showing an ultrasonic image during lithotripsy mode.

【図3】加温モード時の超音波画像を示す説明図である。 3 is an explanatory view showing an ultrasonic image at the time of heating mode.

【図4】本発明の第2の実施の形態の構成を示すブロック図である。 4 is a block diagram showing a configuration of a second embodiment of the present invention.

【図5】本発明の第3の実施の形態の構成を示すブロック図である。 5 is a block diagram showing a configuration of a third embodiment of the present invention.

【図6】結石破砕時の駆動パルスを示すタイムチャートである。 FIG. 6 is a time chart showing a driving pulse at the time of lithotripsy.

【図7】加温・加熱治療時の駆動パルスを示すタイムチャートである。 7 is a time chart showing a driving pulse at the time of warming-heating treatment.

【図8】本発明の第4の実施の形態の構成を示すブロック図である。 8 is a block diagram showing the configuration of a fourth embodiment of the present invention.

【図9】2次元アレイタイプのピエゾ素子を示す説明図である。 9 is an explanatory view showing a piezoelectric element of a two-dimensional array type.

【図10】結石破砕モード時の衝撃波音場を広音場、狭音場にしたときの画面表示例を示す図である。 [Figure 10] lithotripsy mode at the time of the shock wave sound field the Hirooto field, which is a diagram showing a screen display example of when you Semaon field.

【図11】幾何学的焦点を結石の奥側に設定したときの画面表示例を示す図である。 [11] a geometric focus is a diagram showing a screen display example when setting the rear side of the stones.

【図12】加温・加熱モード時の加温領域を広くした場合、狭くした場合の画面表示例を示す図である。 [12] When the wide heating region of the warming-heating mode, a diagram showing a screen display example in the case of narrow.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 ピエゾ素子 4 駆動回路 5 制御回路 6 治療モード切換えスイッチ 8 超音波画像診断装置 10 CRT 11 結石破砕用駆動回路 12 加温用駆動回路 13 加熱用駆動回路 14 駆動回路切換えスイッチ 15 電源回路 17 結石破砕用トリガパルス発生回路 18 加温・加熱用トリガパルス発生回路 19 ゲーティング回路 28 幾何学的焦点 29 衝撃波音場 31 加温領域 32 ディレー回路 35 結石 1 piezo element 4 drive circuit 5 a control circuit 6 treatment mode switch 8 ultrasound system 10 CRT 11 lithotripsy drive circuit 12 heating drive circuit 13 heating drive circuit 14 driving circuit changeover switch 15 power supply circuit 17 lithotripsy use trigger pulse generating circuit 18 warming-heating trigger pulse generating circuit 19 gating circuit 28 geometric focus 29 shockwave sound field 31 heating region 32 delay circuit 35 stones

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 患者体内の患部に局所的に超音波を照射する超音波源と、該患部近傍を撮影する超音波画像診断装置とを有し、該超音波画像診断装置により撮影された超音波画像を観察して患部位置を認識し、該患部位置に前記超音波源から超音波を照射して患部を加温・加熱治療する超音波治療装置において、 前記超音波源による照射領域を操作することができる照射部位制御手段を備え、 前記患部を含む近傍を加温した後に該患部を加熱して治療可能なことを特徴とする超音波治療装置。 [Claim 1 further comprising an ultrasonic source for irradiating locally ultrasound within a patient affected area, and an ultrasound imaging apparatus for capturing a near patient unit, ultrasonic taken by ultrasonic diagnostic imaging apparatus recognizing the affected area position by observing the ultrasound image, the said patient unit located in the ultrasonic therapy apparatus for warming and heating treatment of the affected part is irradiated with ultrasonic waves from the ultrasonic source, operate the irradiated region by the ultrasound source comprising an irradiation site control means capable of, ultrasonic treatment apparatus characterized by treatable by heating the patient part after the neighborhood was warmed including the affected area.
  2. 【請求項2】 患者体内の患部に局所的に超音波を照射する超音波源と、該患部近傍を撮影する超音波画像診断装置とを有し、該超音波画像診断装置により撮影された超音波画像を観察して患部位置を認識し、該患部位置に前記超音波源から超音波を照射して患部を加温・加熱治療する超音波治療装置において 前記超音波源による照射領域を操作することができる照射領域制御手段と、 前記照射領域制御手段による制御内容に応じた前記超音波の音場を画面表示できる音場表示手段とを備え、 前記照射領域の操作に伴って画面表示された前記音場の切換えが可能なことを特徴とする超音波治療装置。 A 2. A ultrasonic source for irradiating locally ultrasound within a patient affected area, and an ultrasound imaging apparatus for capturing a near patient unit, ultrasonic taken by ultrasonic diagnostic imaging apparatus recognizing the affected area position by observing the ultrasound image, manipulating the irradiated region by the ultrasound source in the ultrasonic therapy apparatus for warming and heating treatment of the affected part is irradiated with ultrasonic waves from the ultrasonic source to the patient part position an irradiation area control means capable, the according to the control by the irradiation area control means and a sound field display means capable screen displays an ultrasonic acoustic field, displayed on the screen along with the operation of the irradiation area ultrasonic treatment apparatus characterized by capable of switching of the sound field.
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