JP2000060853A - Ultrasonograph - Google Patents

Ultrasonograph

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JP2000060853A
JP2000060853A JP23370698A JP23370698A JP2000060853A JP 2000060853 A JP2000060853 A JP 2000060853A JP 23370698 A JP23370698 A JP 23370698A JP 23370698 A JP23370698 A JP 23370698A JP 2000060853 A JP2000060853 A JP 2000060853A
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image
ultrasonic
elastic modulus
reflectance
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JP4201396B2 (en )
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Kazunari Ishida
田 一 成 石
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Hitachi Medical Corp
株式会社日立メディコ
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Abstract

PROBLEM TO BE SOLVED: To display the reflectance tomographic images and elastic modulus images of viable tissues on the same screen of an image display device. SOLUTION: This device is provided with a probe 1 for transmitting and receiving ultrasonic waves inside a subject 13, a phasing circuit 7 for receiving reflection echo signals from the inside of the subject 13, performing a delay processing, matching a phase and performing phase addition, a circuit 9 for inputting phased output signals from the phasing circuit 7 and computing the ultrasonic wave reflectance of the viable tissues, the circuit 10 for inputting the phase output signals and computing the elastic modulus of the viable tissues, a scanning converter 11 for inputting arithmetic output signals from the respective arithmetic circuits and preparing image data and the image display 12 for displaying the image data from the scanning converter 11 as ultrasonic images. The reflectance tomographic images and elastic modulus images of a diagnostic part inside the testee body 13 are simultaneously or alternately measured and they are displayed on the same screen of the image display 12.

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、超音波を利用して被検体内の診断部位について超音波画像を得て表示する超音波診断装置に関し、特に、生体組織の反射率断層像と弾性率画像とを画像表示装置の同一画面上に表示することができる超音波診断装置に関する。 BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus for displaying to obtain ultrasound images using an ultrasound for diagnostic site in the subject, in particular, a reflectivity tomographic image and the elastic modulus image of the living tissue an ultrasonic diagnostic apparatus capable of displaying on the same screen of the image display device. 【0002】 【従来の技術】従来の超音波診断装置は、超音波を利用して被検体内の生体組織の超音波反射率を計測し、それを輝度とし診断部位の反射率断層像として表示していた。 [0002] Conventional ultrasonic diagnostic apparatus is an ultrasonic measuring ultrasonic reflectance of the living tissue in the subject, displaying it as a reflectivity tomographic image of a diagnostic region and luminance Was. また、近年の超音波診断装置においては、組織性状診断として生体組織の弾性率を計測し、それを輝度とし診断部位の弾性率画像として表示することが行われるようになってきた。 Further, in the recent ultrasonic diagnostic apparatus, the elastic modulus of the biological tissue is measured as the tissue characterization, it has come to is made possible to display an elastic modulus image of the diagnostic region and luminance. この弾性率画像は、診断部位の生体組織が硬いか、軟らかいかを計測して被検体の診断に役立てようとするものである。 The elastic modulus image, or living tissue diagnosis region is hard, it is to measure how soft the intention Yakudateyo the diagnosis of the subject. 【0003】 【発明が解決しようとする課題】しかし、従来の超音波診断装置においては、診断部位の反射率断層像と弾性率画像とは別々に表示していた。 [0003] The present invention is to provide, however, in the conventional ultrasonic diagnostic apparatus, the reflectance tomographic image and the elastic modulus image diagnostic region has been displayed separately. 即ち、反射率断層像を表示しているときは弾性率画像は表示されず、弾性率画像を表示しているときは反射率断層像は表示されないものであった。 That is, the elastic modulus image when viewing the reflectivity tomographic image is not displayed, were those are not displayed reflectivity tomographic image when displaying the elastic modulus image. この場合、弾性率画像を表示しているときは反射率断層像が表示されないことから、被検体内部のどの部分の弾性率画像を観察しているのかがわからず、解剖学的にどの部分の生体組織が硬いか、軟らかいかを判断するのが困難であり、診断に十分に役立てることができないことがあった。 In this case, since no display reflectivity tomographic image when displaying the elasticity image, without knowing the one is observing the modulus image of any part of the subject, anatomically which portion or living tissue is hard, it is difficult to determine whether the soft, there may not be able to help enough to diagnosis. 【0004】そこで、本発明は、このような問題点に対処し、生体組織の反射率断層像と弾性率画像とを画像表示装置の同一画面上に表示することができる超音波診断装置を提供することを目的とする。 [0004] Therefore, the present invention provides such addresses the problems, an ultrasonic diagnostic apparatus capable of displaying on the same screen of the image display device and a reflection factor tomogram and the elastic modulus image of a biological tissue an object of the present invention is to. 【0005】 【課題を解決するための手段】上記目的を達成するために、本発明による超音波診断装置は、被検体内に超音波を送受信する探触子と、被検体内からの反射エコー信号を受信して遅延処理を行い位相を揃えて加算する整相手段と、この整相手段からの整相出力信号を入力して生体組織の超音波反射率を演算する手段と、上記整相出力信号を入力して生体組織の弾性率を演算する手段と、これら各演算手段からの演算出力信号を入力して画像データを作成するスキャンコンバータと、このスキャンコンバータからの画像データを超音波画像として表示する画像表示装置とを備え、被検体内の診断部位の反射率断層像と弾性率画像とを同時に、或いは交互に計測し、それらを画像表示装置の同一画面上に表示するものである。 [0005] To achieve the above object, resolving means for the problems] The ultrasonic diagnostic apparatus according to the present invention, a probe for transmitting and receiving ultrasonic waves into the subject, the reflected echoes from inside the object a phasing means for adding align the phase subjected to delay processing by receiving a signal, and means for calculating the ultrasonic reflectance of entering biological tissue the phasing output signal from the phasing means, the phasing means for calculating the modulus of elasticity of the living tissue receives the output signal, these scan converter for creating image data by inputting the operation output signal from the calculating means, the image data from the scan converter ultrasound image and an image display device that displays as are those at the same time the reflectivity tomographic image and the elastic modulus image of the diagnostic region in the subject, which or measured alternately displays them on the same screen of the image display device . 【0006】また、上記画像表示装置に表示する反射率断層像と弾性率画像とは、それぞれ別の色の輝度とし、 Further, the reflectance tomographic image and the elastic modulus image to be displayed on the image display device, respectively with different color brightness,
同一画面上にて両画像を重ねて表示するようにしてもよい。 At the same screen may be displayed by overlapping both images. 【0007】さらに、上記画像表示装置に表示する反射率断層像と弾性率画像とは、被検体内への超音波走査方向を一定とし、その走査線方向における生体組織の超音波反射率と弾性率とを計測し、時間経過による超音波反射率に応じた輝度と弾性率に応じた輝度で表示するようにしてもよい。 Furthermore, the above reflectance tomographic image and the elastic modulus image to be displayed on the image display device, and a constant ultrasonic scanning direction into the subject, the ultrasonic reflectivity and elasticity of the biological tissue in the scanning line direction the rate is measured, may be displayed at a luminance corresponding to the luminance and the elastic modulus corresponding to the ultrasonic reflectivity over time. 【0008】 【発明の実施の形態】以下、本発明の実施の形態を添付図面に基づいて説明する。 DETAILED DESCRIPTION OF THE INVENTION Hereinafter, will be explained based on the embodiment of the present invention in the accompanying drawings. 図1は本発明による超音波診断装置の実施の形態を示すブロック図である。 Figure 1 is a block diagram showing an embodiment of an ultrasonic diagnostic apparatus according to the present invention. この超音波診断装置は、超音波を利用して被検体内の診断部位について超音波画像を得て表示するもので、特に、生体組織の反射率断層像と弾性率画像とを画像表示装置の同一画面上に表示するもので、図1に示すように、探触子1 The ultrasonic diagnostic apparatus is an ultrasonic for diagnostic region within the object used for displaying obtaining an ultrasonic image, in particular, of the image display device and a reflection factor tomogram and the elastic modulus image of a biological tissue intended to be displayed on the same screen, as shown in FIG. 1, the probe 1
と、送波パルス発生器2と、送受分離回路3と、低周波発振器4と、バイブレータ5と、送波制御回路6と、整相回路7と、反射・弾性率弁別回路8と、反射率演算回路9と、弾性率演算回路10と、スキャンコンバータ1 If a transmission pulse generator 2, and the transmission and reception separating circuit 3, a low frequency oscillator 4, a vibrator 5, a transmitting control circuit 6, a phasing circuit 7, and the reflection-modulus discriminator circuit 8, the reflectivity an arithmetic circuit 9, and elastic modulus calculating circuit 10, the scan converter 1
1と、画像表示装置12とを備えてなる。 1, composed of an image display device 12. 【0009】上記探触子1は、被検体13内に超音波を送受信するもので、図示省略したがその内部には、超音波を打ち出すと共に反射エコーを受信する複数の振動子が内蔵されている。 [0009] The probe 1 is for transmitting and receiving ultrasonic waves into the subject 13, the inside was not shown, with a built-in multiple transducers for receiving a reflected echo with hammer out the ultrasonic there. 送波パルス発生器2は、上記探触子1を駆動して超音波を送信するための送波パルス信号を発生するものである。 Transmission pulse generator 2, and generates a transmission pulse signal for transmitting ultrasonic waves by driving the probe 1. また、送受分離回路3は、上記送波パルス発生器2からの送波パルス信号を探触子1より超音波を送信することができるように増幅して該探触子1に与え、その後信号線を切り換えることにより探触子1からの受信信号のみを整相回路7側に送るものである。 Also, transmission and reception separating circuit 3 gives the 該探 probe 1 is amplified so as to be able to transmit ultrasonic waves from the probe 1 a transmission pulse signal from the transmission pulse generator 2, then signal it is intended to send only the received signal from the probe 1 to the phasing circuit 7 side by switching the line. 【0010】低周波発振器4は、被検体13に低周波振動を与えるために低周波信号を発生するものである。 [0010] low frequency oscillator 4 is for generating a low frequency signal to provide a low frequency vibration to the object 13. バイブレータ5は、上記低周波発振器4で発生された低周波信号を入力して振動し、被検体13に対して圧力変化を与えるものである。 Vibrator 5 vibrates by entering the low-frequency signal generated by the low frequency oscillator 4 and gives a pressure change to the subject 13. また、送波制御回路6は、上記送波パルス発生器2及び低周波発振器4を制御するもので、被検体13内の診断部位の反射率断層像又は弾性率画像の計測のモードに応じて送波のタイミングを生成するようになっている。 Further, transmitting the control circuit 6 is for controlling the transmission pulse generator 2 and the low frequency oscillator 4, in accordance with the mode of measurement of the reflectance factor tomogram or modulus image of the diagnostic region in the subject 13 It is adapted to generate a timing of transmitting. 【0011】整相回路7は、被検体13内からの反射エコー信号を受信して遅延処理を行い位相を揃えて加算する整相手段となるもので、その内部には、上記探触子1 [0011] phasing circuit 7 serves as a phasing means for adding align the phase performs reception to delay processing the reflected echo signals from the subject within 13, the inside, the probe 1
の各振動子で受信した反射エコー信号を増幅する受波増幅器と、この受信した各反射エコー信号の位相を揃えて加算し受波の超音波ビームを形成する受波遅延回路及び加算器などとから成る。 A reception amplifier for amplifying the reflected echo signals received by each transducer of a like reception delay circuit and an adder for forming an ultrasonic beam reception adds align the phases of the reflected echo signals the received consisting of. 【0012】反射・弾性率弁別回路8は、上記整相回路7からの整相出力信号を入力して、送波制御回路6で生成される反射率断層像又は弾性率画像の計測のモードに応じた送波のタイミングに合わせて、反射率計測用信号と弾性率計測用信号とに弁別するものである。 [0012] Reflection and elastic modulus discriminator circuit 8 inputs the integer phase output signal from the phasing circuit 7, the mode of measurement of the reflectance factor tomogram or modulus image is generated by the transmitting control circuit 6 in accordance with the timing of transmitting in response, it is to discriminate on the reflectivity measurement signal and the elastic modulus measurement signal. そして、 And,
反射率演算回路9は、上記反射・弾性率弁別回路8からの反射率計測用信号を入力して生体組織の超音波反射率を演算する手段となるものである。 Reflectance calculating circuit 9, and serves as a means to enter the reflectance measurement signal from the reflection-modulus discriminator circuit 8 calculates the ultrasonic reflectance of the living body tissue. また、弾性率演算回路10は、上記反射・弾性率弁別回路8からの弾性率計測用信号を入力して生体組織の弾性率を演算する手段となるものである。 The elastic modulus calculation circuit 10 is to be the means by entering the elastic modulus measurement signal from the reflection-modulus discriminator circuit 8 calculates the elasticity modulus of the biological tissues. 【0013】スキャンコンバータ11は、上記反射率演算回路9又は弾性率演算回路10からの超音波反射率又は弾性率の演算出力信号を入力して画像データを作成するものである。 [0013] scan converter 11 is to create an image data input arithmetic output signal of the ultrasonic reflectance or elastic modulus from the reflectance calculating circuit 9 or modulus arithmetic circuit 10. さらに、画像表示装置12は、上記スキャンコンバータ11からの画像データを超音波画像として表示するもので、例えばカラーのテレビモニタから成る。 Further, the image display device 12 displays the image data from the scan converter 11 as an ultrasonic image, for example, a color television monitor. 【0014】そして、本発明においては、上記反射・弾性率弁別回路8及び反射率演算回路9並びに弾性率演算回路10の動作により、被検体13内の診断部位の反射率断層像と弾性率画像とを同時に、或いは交互に計測し、それらを画像表示装置12の同一画面上に表示するようになっている。 [0014] In the present invention, by the operation of the reflection-modulus discriminator circuit 8 and the reflectance calculating circuit 9 and elastic modulus calculating circuit 10, the reflectance tomographic image and the elastic modulus image of the diagnostic region in the subject 13 DOO simultaneously, or are measured alternately turned them to be displayed on the same screen of the image display device 12. 【0015】次に、このように構成された超音波診断装置において診断部位の反射率断層像と弾性率画像とを得て表示する動作について、図2及び図3を参照して説明する。 [0015] Next, the operation of displaying obtaining a reflectance tomographic image and the elastic modulus image diagnosis region in such ultrasonic diagnostic apparatus constructed will be described with reference to FIGS. まず、図1に示す送波制御回路6により、図2に示すように、反射率断層像を計測する反射率測定時相と弾性率画像を計測する弾性率測定時相とに応じて送波のタイミングT 1 ,T 2 ,T 3を生成する。 First, the transmitting control circuit 6 shown in FIG. 1, as shown in FIG. 2, in accordance with the modulus of elasticity measurement time phase for measuring the elastic modulus image and reflectance measurements at phase for measuring the reflection factor tomogram transmitting generating a timing T 1, T 2, T 3 . この生成された送波タイミングT 1 ,T Transmission timing T 1 This generated, T 2 ,T 3は送波パルス発生器2及び低周波発振器4に送られ、それらの動作を制御する。 2, T 3 is sent to the transmission pulse generator 2 and the low frequency oscillator 4, to control their operation. 【0016】まず、送波タイミングT 1の時には、反射率測定時相であり、送波パルス発生器2は、タイミングT 1に合わせて例えば周波数3.5MHz,3波数の正弦波を発生させ、送受分離回路3を介して探触子1に送波パルス信号を供給する。 [0016] First, when the transmission timing T 1 is the reflectance measurement time phase, transmit pulse generator 2, the timing T 1 in accordance with example frequency 3.5 MHz, to generate a sine wave of 3 wavenumber, handset supplying a transmission pulse signal to the probe 1 through the separating circuit 3. これにより、探触子1が駆動され、該探触子1から被検体13内に超音波が送信されると共に、反射エコー信号が受信される。 Accordingly, the probe 1 is driven, the ultrasonic waves are transmitted from 該探 probe 1 into the subject 13, reflected echo signals are received. このときは、低周波発振器4は動作しておらず、被検体13内には圧力変化が与えられていないので、通常の反射率断層像(B In this case, low frequency oscillator 4 is not in operation, since the inside of the subject 13 is not given a pressure change, the normal reflectance tomographic image (B
モード像)を計測するモードとなる。 A mode for measuring the mode image). そして、反射・弾性率弁別回路8は、整相回路7からの整相出力信号を反射率計測用信号と弁別し、反射率演算回路9へ上記整相出力信号を送る。 The reflected-modulus discriminator circuit 8 discriminates the reflectance measurement signal phasing output signal from the phasing circuit 7, sends the phasing output signal to the reflectance calculation circuit 9. この場合、反射率演算回路9では、通常の反射率断層像の信号処理を行い、生体組織の超音波反射率を演算する。 In this case, the reflectance calculating circuit 9 performs signal processing of the normal reflectance tomographic image, calculates the ultrasonic reflectance of the living body tissue. 【0017】次に、送波タイミングT 2の時には、弾性率測定時相に入り、低周波発振器4は、図2に示すような出力信号をバイブレータ5に送出し、該バイブレータ5は振動して上記出力信号の振幅に応じた圧力を被検体13に与える。 Next, when the transmission timing T 2 are, we enter the time phase modulus measurement, the low frequency oscillator 4, the output signal as shown in FIG. 2 and sent to the vibrator 5, the vibrator 5 vibrates applying pressure corresponding to the amplitude of the output signal to the subject 13. この状態でも、送波パルス発生器2は送受分離回路3を介して探触子1に送波パルス信号を供給する。 In this state, transmission pulse generator 2 supplies a transmission pulse signal to the probe 1 via a transmission and reception separating circuit 3. これにより、探触子1から被検体13内に超音波が送信されると共に、反射エコー信号が受信される。 Thereby, the ultrasonic waves are transmitted into the subject 13 from the probe 1, the reflected echo signals are received. このときは、被検体13内に圧力変化が与えられた状態で計測するので、弾性率画像を計測するモードとなる。 In this case, since the measurement in a state where the pressure change into the subject 13 is applied, the mode of measuring the elasticity modulus image. そして、反射・弾性率弁別回路8は、整相回路7からの整相出力信号を弾性率計測用信号と弁別し、弾性率演算回路10へ上記整相出力信号を送る。 Then, the reflection-modulus discriminator circuit 8 discriminates the elastic modulus measurement signal phasing output signal from the phasing circuit 7, sends the phasing output signal to modulus arithmetic circuit 10. この場合、弾性率演算回路10では、弾性率画像の信号処理を行い、そのときの信号を例えばE 2 (t)として記憶する。 In this case, the elastic modulus arithmetic circuit 10 performs signal processing of the elastic modulus image, and stores the signal at that time, for example, as E 2 (t). 【0018】次に、送波タイミングT 3の時には、引き続き弾性率測定時相であり、上記と同様にバイブレータ5によって被検体13に圧力変化が与えられ、探触子1 Next, when the transmission timing T 3 continues an elastic modulus measurement time phase, the pressure change in the subject 13 in the same manner as described above by the vibrator 5 is provided, the probe 1
により上記圧力変化が与えられた被検体13内に超音波が送信されると共に、反射エコー信号が受信される。 Ultrasonic waves into the subject 13 to the pressure change is given while being transmitted, reflected echo signals are received by. このとき、圧力変化を受けた被検体13の内部の微小な反射体は、その生体組織の弾性率の違いによって位置の変化の度合いが変わるため、超音波反射波の振幅の変化を起こす。 At this time, the inside of the small reflector of the subject 13 under pressure changes, since the degree of change in position by the difference in the modulus of the living tissue changes, causing the change in amplitude of the reflected ultrasonic wave. このときも、上記と同様に弾性率画像を計測するモードとなる。 In this case, a mode for measuring the elastic modulus image in the same manner as described above. そして、反射・弾性率弁別回路8は、 Then, the reflection-modulus discriminator circuit 8,
整相回路7からの整相出力信号を弾性率計測用信号と弁別し、弾性率演算回路10へ上記整相出力信号を送る。 The phasing output signal from the phasing circuit 7 discriminates the elastic modulus measurement signal, and sends the delay-output signal to the modulus computation circuit 10.
この場合、弾性率演算回路10では、弾性率画像の信号処理を行い、そのときの信号を例えばE 3 (t)として記憶する。 In this case, the elastic modulus arithmetic circuit 10 performs signal processing of the elastic modulus image, and stores the signal at that time for example E 3 as (t). 【0019】そして、上記弾性率演算回路10では、記憶した二つの信号E 2 (t),E 3 (t)からその変化率ΔE [0019] Then, in the elastic modulus calculating circuit 10, two signals E 2 (t) stored, the rate of change ΔE from E 3 (t)
(t)を次式により求め、生体組織の弾性率を演算する。 (T) is obtained from the following equation, we calculate the elastic modulus of the biological tissues. ΔE(t)={E 2 (t)−E 3 (t)}/E 2 (t) これを上記被検体13の内部の微小な反射体の弾性率として出力する。 ΔE (t) = outputting a {E 2 (t) -E 3 (t)} / E 2 (t) as the elastic modulus of the internal micro reflectors of the subject 13. 【0020】上記反射率演算回路9から出力された生体組織の超音波反射率の信号、及び弾性率演算回路10から出力された生体組織の弾性率の信号は、スキャンコンバータ11に入力し、該スキャンコンバータ11により、生体組織の超音波反射率に応じた白黒の輝度として画像データを作成し、生体組織の弾性率に応じて赤や青その他の色の輝度として画像データを作成する。 The signals of the elastic modulus of the ultrasonic reflectance of the signal of the biological tissue that has been outputted from the reflectance calculating circuit 9, and the biological tissue which is output from the elasticity calculation circuit 10 is input to the scan converter 11, the the scan converter 11, the image data created as the brightness of black and white in accordance with the ultrasonic reflectance of the living tissue, creates image data as red and blue other colors brightness in response to the elastic modulus of the biological tissues. これを走査線を順次移動させ、走査線毎に画像データを作成していく。 This sequentially moving the scanning lines, continue to create image data for each scanning line. 【0021】上記スキャンコンバータ11で作成された画像データは、画像表示装置12へ入力されて表示される。 The image data created by the scan converter 11 is displayed is input to the image display device 12. このとき、図3に示すように、画像表示装置12の表示画面を例えば左右或いは上下に二分割し、一方側に生体組織の超音波反射率の大きい部位(臓器)Aを画像化した反射率断層像I 1を表示し、他方側に生体組織の弾性率の大きい部位(臓器)Bを画像化した弾性率画像I 2を表示する。 At this time, as shown in FIG. 3, and bisects the display screen of the image display device 12, for example horizontally or vertically, whereas larger sites (organs) of the ultrasonic reflectance of the living tissue on the side A of the imaged reflectance to display the tomographic image I 1, and displays an image of the elastic modulus image I 2 a large site (organ) B of the elastic modulus of the biological tissues on the other side. これにより、被検体13内の診断部位の反射率断層像I 1と弾性率画像I 2とを画像表示装置1 Thus, the image display device and a reflection factor tomogram I 1 and the elastic modulus image I 2 of the diagnosis region in the subject 13 1
2の同一画面上に表示することができる。 2 can be displayed on the same screen. 【0022】なお、図2においては、送波タイミングT [0022] In FIG. 2, transmission timing T
1とT 2とを異なる時相としたが、これに限らず、上記送波タイミングT 1とT 2とを同一時相としてもよい。 Although the time phase different between 1 and T 2, not limited to this, and the transmission timing T 1 and T 2 may be the same time phase. この場合は、反射率測定時相と弾性率測定時相とが重なり、 In this case, it overlaps the reflectance measurement phases and the elastic modulus measurement time phase,
診断部位の反射率断層像I 1と弾性率画像I 2とを同時に計測して、同一画面上に表示することができる。 A reflectivity tomographic image I 1 of the diagnostic region and the elastic modulus image I 2 simultaneously measured, it is possible to display on the same screen. 【0023】図4は、画像表示装置12に対する反射率断層像と弾性率画像の表示の他の実施形態を示す説明図である。 [0023] FIG. 4 is an explanatory view showing another embodiment of a display of a reflection factor tomogram and the elastic modulus image to the image display device 12. この実施形態は、上記画像表示装置12に表示する反射率断層像I 1と弾性率画像I 2とを、それぞれ別の色の輝度とし、同一画面上にて両画像を重ねて表示するようにしたものである。 This embodiment, a reflection factor tomogram I 1 and the elastic modulus image I 2 to be displayed on the image display device 12, respectively with different color brightness, so that displayed overlapping both images at the same screen one in which the. 例えば、生体組織の超音波反射率の大きい部位Aを画像化した反射率断層像I 1を超音波反射率に応じた白黒の輝度とし、生体組織の弾性率の大きい部位Bを画像化した弾性率画像I 2を弾性率に応じて赤や青その他の色の輝度として、両画像を重ねて表示する。 For example, the reflectance tomographic image I 1 obtained by imaging large portion A of the ultrasonic reflectance of the living tissue as the brightness of black and white in accordance with the ultrasound reflectivity was imaged portions with high B elastic modulus of the biological tissue elasticity the rate image I 2 as red and blue other colors brightness in response to the elastic modulus, is displayed over the both images. このようにすると、被検体13内部のどの部分の弾性率画像I 2を観察しているのかが一目瞭然に理解でき、解剖学的にどの部分の生体組織が硬いか、軟らかいかを判断するのが容易となる。 In this way, whether have observed modulus image I 2 of which part of the subject 13 is plainly understand, whether anatomically any part of the living tissue is hard, it is to determine whether the soft easy to become. 【0024】図5は、画像表示装置12に対する反射率断層像と弾性率画像の表示の更に他の実施形態を示す説明図である。 FIG. 5 is an explanatory view showing still another embodiment of the display of the reflection factor tomogram and the elastic modulus image to the image display device 12. この実施形態は、被検体13内への超音波走査方向を一定とし、その走査線14の方向における生体組織の超音波反射率と弾性率とを計測し、時間経過による超音波反射率に応じた輝度と弾性率に応じた輝度で表示するようにしたものである。 This embodiment is a constant ultrasonic scanning direction into the subject 13, by measuring the ultrasonic reflectivity and the elastic modulus of the biological tissue in the direction of the scanning lines 14, depending on the ultrasonic reflectance over time and it is obtained so as to display at a luminance corresponding to the luminance and the elastic modulus. このときは、図1に示すスキャンコンバータ11の動作を変え、通常のMモード像と同様の表示を行う。 In this case, change the operation of the scan converter 11 shown in FIG. 1, the display of like a normal M-mode image. 即ち、被検体13内の診断部位に対し走査線14の方向を固定し、例えば、診断部位の深さを画面の縦軸方向にとり、時間軸を横軸方向にとって、順次時間軸方向にスクロールさせて診断部位の深さ方向における超音波反射率の大きい部位Aと弾性率の大きい部位Bを画像化して、同一画面上に表示する。 That is, to fix the direction of the scan line 14 with respect to a diagnostic region within the object 13, for example, taking the depth of the diagnosis region in the direction of the longitudinal axis of the screen, abscissa direction time axis, to scroll sequentially the time axis direction a large portion B of a large portion a and the elastic modulus of the ultrasonic reflectivity in the depth direction of the diagnostic region and imaging Te, and displays on the same screen. この場合は、診断部位の深さ方向における超音波反射率の大きい部位Aと弾性率の大きい部位Bとの関係が理解できる。 In this case, it relationships between large part B of larger sites A and the elastic modulus of the ultrasonic reflectance understood in the depth direction of the diagnostic region. 【0025】 【発明の効果】本発明は以上のように構成されたので、 [0025] While preferred embodiments of the present invention is configured as described above,
被検体内の診断部位の反射率断層像と弾性率画像とを同時に、或いは交互に計測し、生体組織の反射率断層像と弾性率画像とを画像表示装置の同一画面上に表示することができる。 A reflectivity tomographic image and the elastic modulus image of the diagnostic region in the subject at the same time, or be measured alternately displaying the reflectance tomographic image and the elastic modulus image of the biological tissue on the same screen of the image display device it can. したがって、被検体内部のどの部分の弾性率画像を観察しているのかが一目瞭然に理解でき、診断に役立てることができる。 Thus, what has been observed modulus image of any part of the subject is plainly understand, can be useful for diagnosis. 【0026】また、上記画像表示装置に表示する反射率断層像と弾性率画像とは、それぞれ別の色の輝度とし、 Further, the reflectance tomographic image and the elastic modulus image to be displayed on the image display device, respectively with different color brightness,
同一画面上にて両画像を重ねて表示するようにした場合は、被検体内部のどの部分の弾性率画像を観察しているのかが一目瞭然に理解でき、解剖学的にどの部分の生体組織が硬いか、軟らかいかを判断するのが容易となる。 If you to display superimposed both images at the same screen, whether have observed modulus image of any part of the subject it is plainly understand, anatomically any part of the living tissue hard or, it becomes easy to determine whether or not soft. 【0027】さらに、上記画像表示装置に表示する反射率断層像と弾性率画像とは、被検体内への超音波走査方向を一定とし、その走査線方向における生体組織の超音波反射率と弾性率とを計測し、時間経過による超音波反射率に応じた輝度と弾性率に応じた輝度で表示するようにした場合は、診断部位の深さ方向における超音波反射率の大きい部位と弾性率の大きい部位との関係が理解できる。 Furthermore, the above reflectance tomographic image and the elastic modulus image to be displayed on the image display device, and a constant ultrasonic scanning direction into the subject, the ultrasonic reflectivity and elasticity of the biological tissue in the scanning line direction the rate is measured, if it be displayed at a luminance corresponding to the luminance and the elastic modulus corresponding to the ultrasonic reflectance over time, a large portion and the elastic modulus of the ultrasonic reflectivity in the depth direction of the diagnostic region I can understand the relationship between the large part of.

【図面の簡単な説明】 【図1】本発明による超音波診断装置の実施の形態を示すブロック図である。 Is a block diagram showing an embodiment of the BRIEF DESCRIPTION OF THE DRAWINGS [Figure 1] ultrasound diagnostic apparatus according to the present invention. 【図2】上記超音波診断装置の送波制御回路により、反射率測定時相と弾性率測定時相とに応じて送波のタイミングが生成される状態を示す説明図である。 [2] The transmitting control circuit of the ultrasonic diagnostic apparatus is an explanatory view showing a state in which the timing of transmitting is generated in accordance with the reflectance measurement phases and the elastic modulus measurement phase. 【図3】画像表示装置の同一画面上に表示される診断部位の反射率断層像と弾性率画像とを示す説明図である。 3 is an explanatory view showing a reflection factor tomogram and the elastic modulus image diagnosis region to be displayed on the same screen of the image display device. 【図4】画像表示装置に対する反射率断層像と弾性率画像の表示の他の実施形態を示す説明図である。 4 is an explanatory view showing another embodiment of a display of a reflection factor tomogram and the elastic modulus image to the image display device. 【図5】画像表示装置に対する反射率断層像と弾性率画像の表示の更に他の実施形態を示す説明図である。 FIG. 5 is an explanatory view showing still another embodiment of the display of the reflection factor tomogram and the elastic modulus image to the image display device. 【符号の説明】 1…探触子1 2…送波パルス発生器3…送受分離回路4…低周波発振器5…バイブレータ6…送波制御回路7…整相回路8…反射・弾性率弁別回路9…反射率演算回路10…弾性率演算回路11…スキャンコンバータ12…画像表示装置13…被検体14…走査線A…反射率の大きい部位B…弾性率の大きい部位 [Description of Reference Numerals] 1 ... probe 1 2 ... transmission pulse generator 3 ... transmission and reception separator circuit 4 ... low-frequency oscillator 5 ... vibrator 6 ... transmitting control circuit 7 ... phasing circuit 8 ... reflection-modulus discriminator 9 ... large portion of the reflectance calculating circuit 10 ... elastic modulus calculating circuit 11 ... large site B ... elastic modulus of the scan converter 12 ... image display device 13 ... object 14 ... scanning lines a ... reflectance

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 被検体内に超音波を送受信する探触子と、被検体内からの反射エコー信号を受信して遅延処理を行い位相を揃えて加算する整相手段と、この整相手段からの整相出力信号を入力して生体組織の超音波反射率を演算する手段と、上記整相出力信号を入力して生体組織の弾性率を演算する手段と、これら各演算手段からの演算出力信号を入力して画像データを作成するスキャンコンバータと、このスキャンコンバータからの画像データを超音波画像として表示する画像表示装置とを備え、 [Claims 1. A probe for transmitting and receiving ultrasonic waves into the subject, phasing means for adding align the phase performs reception to delay processing the reflected echo signals from the subject If, means for calculating the ultrasonic reflectance of the living tissue to enter the phasing output signal from the phasing means, and means to input the phasing output signal to calculate the elastic modulus of the biological tissues, these includes a scan converter for creating image data by inputting the operation output signal from the computing means, and an image display device for displaying the image data from the scan converter as an ultrasonic image,
    被検体内の診断部位の反射率断層像と弾性率画像とを同時に、或いは交互に計測し、それらを画像表示装置の同一画面上に表示することを特徴とする超音波診断装置。 A reflectivity tomographic image and the elastic modulus image of the diagnostic region in the subject at the same time, or by measuring alternately, an ultrasonic diagnostic apparatus and displaying the same screen on which the image display device. 【請求項2】 上記画像表示装置に表示する反射率断層像と弾性率画像とは、それぞれ別の色の輝度とし、同一画面上にて両画像を重ねて表示することを特徴とする請求項1記載の超音波診断装置。 Wherein the reflectance tomographic image and the elastic modulus image to be displayed on the image display apparatus, the claims are a different color brightness, and displaying overlapping both images at the same screen 1 ultrasonic diagnostic apparatus according. 【請求項3】 上記画像表示装置に表示する反射率断層像と弾性率画像とは、被検体内への超音波走査方向を一定とし、その走査線方向における生体組織の超音波反射率と弾性率とを計測し、時間経過による超音波反射率に応じた輝度と弾性率に応じた輝度で表示することを特徴とする請求項1記載の超音波診断装置。 Wherein the reflectance tomographic image and the elastic modulus image to be displayed on the image display device, and a constant ultrasonic scanning direction into the subject, the ultrasonic reflectivity and elasticity of the biological tissue in the scanning line direction the rate is measured, the ultrasonic diagnostic apparatus according to claim 1, wherein the display at a luminance corresponding to the luminance and the elastic modulus corresponding to the ultrasonic reflectivity over time.
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