JP2000060853A - Ultrasonograph - Google Patents
UltrasonographInfo
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- JP2000060853A JP2000060853A JP10233706A JP23370698A JP2000060853A JP 2000060853 A JP2000060853 A JP 2000060853A JP 10233706 A JP10233706 A JP 10233706A JP 23370698 A JP23370698 A JP 23370698A JP 2000060853 A JP2000060853 A JP 2000060853A
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- image
- elastic modulus
- reflectance
- ultrasonic
- subject
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Abstract
Description
【０００１】[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 1. Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus for obtaining and displaying an ultrasonic image of a diagnostic region in a subject by using ultrasonic waves, and more particularly to a reflectance tomographic image and elastic modulus of living tissue. The present invention relates to an ultrasonic diagnostic apparatus capable of displaying an image and an image on the same screen of an image display apparatus.
【０００２】[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。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。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。2. Description of the Related Art A conventional ultrasonic diagnostic apparatus uses ultrasonic waves to measure the ultrasonic reflectance of a living tissue inside a subject and displays the ultrasonic reflectance as a tomographic image of the reflectance of a diagnostic region. . In recent years, ultrasonic diagnostic apparatuses have come to measure the elastic modulus of a living tissue as a tissue property diagnosis and display it as brightness as an elastic modulus image of a diagnosis site. This elastic modulus image is used for diagnosis of the subject by measuring whether the living tissue at the diagnosis site is hard or soft.
【０００３】[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。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。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。However, in the conventional ultrasonic diagnostic apparatus, the reflectance tomographic image and the elastic modulus image of the diagnostic region are displayed separately. That is, the elastic modulus image is not displayed when the reflectance tomographic image is displayed, and the reflectance tomographic image is not displayed when the elastic modulus image is displayed. In this case, since the reflectance tomographic image is not displayed when the elasticity modulus image is displayed, it is not known which part of the inside of the subject the elasticity modulus image is being observed, and which part is anatomically determined. It was difficult to judge whether the living tissue was hard or soft, and it could not be sufficiently useful for 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。Therefore, the present invention provides an ultrasonic diagnostic apparatus which can cope with such a problem and display a reflectance tomographic image and an elastic modulus image of a living tissue on the same screen of an image display device. The purpose is to do.
【０００５】[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。In order to achieve the above-mentioned object, an ultrasonic diagnostic apparatus according to the present invention receives a probe for transmitting and receiving ultrasonic waves in a subject and a reflected echo signal from the inside of the subject. Then, the phasing means for delaying and aligning and adding the phases, the phasing output signal from the phasing means for calculating the ultrasonic reflectance of the biological tissue, and the phasing output signal Means for inputting and calculating the elastic modulus of biological tissue, scan converter for inputting operation output signals from these respective calculating means to create image data, and image data from this scan converter is displayed as an ultrasonic image An image display device is provided, and a reflectance tomographic image and an elastic modulus image of a diagnostic site in the subject are measured simultaneously or alternately and these are displayed 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、
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。Further, the reflectance tomographic image and the elastic modulus image displayed on the image display device have luminances of different colors,
Both images may be displayed so as to overlap each other on the same screen.
【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。Further, the reflectance tomographic image and the elastic modulus image displayed on the image display device have a constant ultrasonic scanning direction into the subject and the ultrasonic reflectance and elasticity of the living tissue in the scanning line direction. The rate may be measured, and the luminance may be displayed with the luminance according to the ultrasonic reflectance and the luminance according to the elasticity over time.
【０００８】[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。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。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
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
１と、画像表示装置１２とを備えてなる。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of an ultrasonic diagnostic apparatus according to the present invention. This ultrasonic diagnostic apparatus obtains and displays an ultrasonic image of a diagnosis site in a subject using ultrasonic waves, and particularly, a reflectance tomographic image and elastic modulus image of a biological tissue are displayed by an image display apparatus. As shown in FIG. 1, the probe 1 is displayed on the same screen.
A transmission pulse generator 2, a transmission / reception separation circuit 3, a low frequency oscillator 4, a vibrator 5, a transmission control circuit 6, a phasing circuit 7, a reflection / elasticity modulus discrimination circuit 8, and a reflectance ratio. Arithmetic circuit 9, elastic modulus arithmetic circuit 10, and scan converter 1
1 and the 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。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。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。The probe 1 transmits / receives ultrasonic waves to / from the subject 13. Although not shown, a plurality of transducers for emitting ultrasonic waves and receiving reflected echoes are built in the probe 1. There is. The transmission pulse generator 2 drives the probe 1 to generate a transmission pulse signal for transmitting ultrasonic waves. Further, the transmission / reception separation circuit 3 amplifies the transmission pulse signal from the transmission pulse generator 2 so as to transmit ultrasonic waves from the probe 1 and gives the amplified pulse signal to the probe 1 and then the signal. By switching the lines, only the received signal from the probe 1 is sent to the phasing circuit 7.
【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。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。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。The low frequency oscillator 4 is for generating a low frequency signal in order to give a low frequency vibration to the subject 13. The vibrator 5 inputs and oscillates the low frequency signal generated by the low frequency oscillator 4, and gives a pressure change to the subject 13. The wave transmission control circuit 6 controls the wave transmission pulse generator 2 and the low frequency oscillator 4 according to the measurement mode of the reflectance tomographic image or the elastic modulus image of the diagnostic region in the subject 13. It is designed to generate the timing of transmission.
【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
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。The phasing circuit 7 serves as a phasing means for receiving the reflected echo signal from the inside of the subject 13 and performing delay processing to align the phases and add the signals.
A receiving amplifier that amplifies the reflected echo signal received by each transducer, and a receiving delay circuit and an adder that form the received ultrasonic waves by aligning and adding the phases of the received reflected echo signals. Consists 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。そして、
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。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 reflection / elasticity modulus discriminating circuit 8 inputs the phasing output signal from the phasing circuit 7 and enters the mode for measuring the reflectance tomographic image or the elastic modulus image generated by the wave transmission control circuit 6. The reflectance measurement signal and the elastic modulus measurement signal are discriminated in accordance with the corresponding transmission timing. And
The reflectance calculation circuit 9 is a means for calculating the ultrasonic reflectance of the living tissue by inputting the reflectance measurement signal from the reflection / elasticity discrimination circuit 8. The elastic modulus calculation circuit 10 is a means for calculating the elastic modulus of the living tissue by inputting the elastic modulus measurement signal from the reflection / elasticity modulus discrimination circuit 8.
【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。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。The scan converter 11 inputs the calculation output signal of the ultrasonic reflectance or elastic modulus from the reflectance arithmetic circuit 9 or the elastic modulus arithmetic circuit 10 to create image data. Further, the image display device 12 displays the image data from the scan converter 11 as an ultrasonic image, and is composed of, 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。Further, in the present invention, by the operations of the reflection / elasticity modulus discrimination circuit 8, the reflectance calculation circuit 9 and the elasticity modulus calculation circuit 10, the reflectance tomographic image and the elasticity modulus image of the diagnostic region in the subject 13 are obtained. Are measured simultaneously or alternately, and they are 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。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Ｔ1，Ｔ2，Ｔ3を生成する。この生成された
送波タイミングＴ1，Ｔ 2，Ｔ3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。Next, the ultrasonic diagnostic apparatus constructed as described above
At a diagnostic location, obtain a tomographic image of reflectance and an image of elastic modulus of the diagnostic site.
The operation of displaying by displaying will be described with reference to FIGS. 2 and 3.
To do. First, the transmission control circuit 6 shown in FIG.
As shown, the reflectance measurement time phase for measuring the reflectance tomographic image and
Elastic wave image is measured.
Timing T1, T2, T3To generate. This generated
Transmission timing T1, T 2, T3Is the transmission pulse generator 2 and
And low frequency oscillator 4 to control their operation.
【００１６】まず、送波タイミングＴ1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
Ｔ1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。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。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
モード像）を計測するモードとなる。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。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。First, at the transmission timing T 1 , it is a reflectance measurement time phase, and the transmission pulse generator 2 generates a sine wave with a frequency of 3.5 MHz and 3 waves in accordance with the timing T 1 , and transmits / receives it. A transmission pulse signal is supplied to the probe 1 via the separation circuit 3. As a result, the probe 1 is driven, ultrasonic waves are transmitted from the probe 1 into the subject 13, and reflected echo signals are received. At this time, since the low-frequency oscillator 4 is not operating and the pressure change is not applied to the inside of the subject 13, the normal reflectance tomographic image (B
It becomes the mode for measuring the mode image). Then, the reflection / elasticity modulus discrimination circuit 8 discriminates the phasing output signal from the phasing circuit 7 from the reflectance measurement signal, and sends the phasing output signal to the reflectance calculation circuit 9. In this case, the reflectance calculation circuit 9 performs signal processing of a normal reflectance tomographic image to calculate the ultrasonic reflectance of the living tissue.
【００１７】次に、送波タイミングＴ2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。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。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。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。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。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Ｅ2(t)として記憶する。Next, at the transmission timing T 2 , the elastic modulus measurement time phase is entered, and the low frequency oscillator 4 sends an output signal as shown in FIG. 2 to the vibrator 5, and the vibrator 5 vibrates. A pressure corresponding to the amplitude of the output signal is applied to the subject 13. Even in this state, the transmission pulse generator 2 supplies the transmission pulse signal to the probe 1 via the transmission / reception separation circuit 3. As a result, ultrasonic waves are transmitted from the probe 1 into the subject 13, and reflected echo signals are received. At this time, since the measurement is performed in a state where the pressure change is applied to the inside of the subject 13, the mode is the mode for measuring the elastic modulus image. Then, the reflection / elasticity modulus discriminating circuit 8 discriminates the phasing output signal from the phasing circuit 7 from the elastic modulus measuring signal and sends the phasing output signal to the elastic modulus calculating circuit 10. In this case, the elastic modulus calculation circuit 10 performs signal processing on the elastic modulus image and stores the signal at that time as, for example, E 2 (t).
【００１８】次に、送波タイミングＴ3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
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。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。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。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。
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Ｅ3(t)として記憶
する。Next, at the wave transmission timing T 3 , the elastic modulus measurement time phase continues, and the vibrator 5 applies a pressure change to the subject 13 in the same manner as described above, and the probe 1
As a result, ultrasonic waves are transmitted into the subject 13 to which the pressure change has been applied, and reflected echo signals are received. At this time, the minute reflector inside the subject 13 that has undergone the pressure change changes the degree of position change due to the difference in elastic modulus of the living tissue, and thus changes the amplitude of the ultrasonic reflected wave. At this time as well, the mode is the same as the above, in which the elasticity image is measured. Then, the reflection / elasticity modulus discrimination circuit 8 is
The phasing output signal from the phasing circuit 7 is discriminated from the elastic modulus measuring signal, and the phasing output signal is sent to the elastic modulus calculating circuit 10.
In this case, the elastic modulus calculation circuit 10 performs signal processing on the elastic modulus image and stores the signal at that time as, for example, E 3 (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Ｅ2(t)，Ｅ3(t)からその変化率ΔＥ
(t)を次式により求め、生体組織の弾性率を演算する。
ΔＥ(t)＝｛Ｅ2(t)−Ｅ3(t)｝／Ｅ2(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。In the elastic modulus arithmetic circuit 10, the change rate ΔE is calculated from the two stored signals E 2 (t) and E 3 (t).
(t) is calculated by the following equation, and the elastic modulus of the living tissue is calculated. ΔE (t) = {E 2 (t) −E 3 (t)} / E 2 (t) This is output as the elastic modulus of the minute reflector inside 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。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。The ultrasonic reflectance signal of the biological tissue output from the reflectance calculation circuit 9 and the elastic modulus signal of the biological tissue output from the elastic modulus calculation circuit 10 are input to the scan converter 11, The scan converter 11 creates image data as black and white brightness according to the ultrasonic reflectance of the living tissue, and creates image data as red, blue and other colors according to the elasticity of the living tissue. The scanning lines are sequentially moved 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。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Ｉ1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
Ｉ2を表示する。これにより、被検体１３内の診断部位
の反射率断層像Ｉ1と弾性率画像Ｉ2とを画像表示装置１
２の同一画面上に表示することができる。The image data created by the scan converter 11 is input to the image display device 12 and displayed. At this time, as shown in FIG. 3, the display screen of the image display device 12 is divided into, for example, left and right or upper and lower parts, and the reflectance of a part (organ) A of the biological tissue having a high ultrasonic reflectance is imaged on one side. A tomographic image I 1 is displayed, and an elastic modulus image I 2 which is an image of a region (organ) B having a large elastic modulus of a biological tissue is displayed on the other side. As a result, the reflectance tomographic image I 1 and the elastic modulus image I 2 of the diagnostic region in the subject 13 are displayed on the image display device 1.
It can be displayed on the same two screens.
【００２２】なお、図２においては、送波タイミングＴ
1とＴ2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Ｔ1とＴ2とを同一時相としてもよい。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、
診断部位の反射率断層像Ｉ1と弾性率画像Ｉ2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。In FIG. 2, the transmission timing T
Although 1 and T 2 are different time phases, the present invention is not limited to this, and the transmission timings T 1 and T 2 may be the same time phase. In this case, the reflectance measurement time phase and the elastic modulus measurement time phase overlap,
It is possible to simultaneously measure the reflectance tomographic image I 1 and the elastic modulus image I 2 of the diagnosis site and display them 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。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Ｉ1と弾性率画像Ｉ2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。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Ｉ1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Ｉ2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。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Ｉ2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。FIG. 4 is an explanatory view showing another embodiment of displaying the reflectance tomographic image and the elastic modulus image on the image display device 12. In this embodiment, the reflectance tomographic image I 1 and the elastic modulus image I 2 displayed on the image display device 12 have different color intensities, and both images are displayed in a superimposed manner on the same screen. It was done. For example, a reflectance tomographic image I 1 obtained by imaging a portion A of the living tissue having a large ultrasonic reflectance is used as black and white brightness corresponding to the ultrasonic reflectance, and an elasticity obtained by imaging a portion B of the living tissue having a large elastic modulus is imaged. The rate image I 2 is displayed as luminance of red, blue, and other colors according to the elastic modulus, and both images are displayed in an overlapping manner. By doing so, it is possible to understand at a glance which part of the inside of the subject 13 the elastic modulus image I 2 is being observed, and it is anatomically determined which part of the living tissue is hard or soft. It will be easy.
【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。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。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。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。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。FIG. 5 is an explanatory view showing still another embodiment of displaying the reflectance tomographic image and the elastic modulus image on the image display device 12. In this embodiment, the ultrasonic scanning direction into the subject 13 is fixed, the ultrasonic reflectance and elastic modulus of the living tissue in the direction of the scanning line 14 are measured, and the ultrasonic reflectance according to the elapsed time is measured. The brightness is displayed according to the brightness and the elastic modulus. At this time, the operation of the scan converter 11 shown in FIG. 1 is changed, and display similar to that of a normal M-mode image is performed. That is, the direction of the scanning line 14 is fixed with respect to the diagnosis site in the subject 13, and, for example, the depth of the diagnosis site is set in the vertical axis direction of the screen, and the time axis is set in the horizontal axis direction, and scrolled sequentially in the time axis direction. A region A having a large ultrasonic reflectance and a region B having a large elastic modulus in the depth direction of the diagnostic region are imaged and displayed on the same screen. In this case, the relationship between the region A having a large ultrasonic reflectance and the region B having a large elastic modulus in the depth direction of the diagnosis region can be understood.
【００２５】[0025]
【発明の効果】本発明は以上のように構成されたので、
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。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。Since the present invention is constructed as described above,
A reflectance tomographic image and an elastic modulus image of a diagnostic region in a subject may be measured simultaneously or alternately, and the reflectance tomographic image and the elastic modulus image of the biological tissue may be displayed on the same screen of the image display device. it can. Therefore, it is possible to understand at a glance which part of the inside of the subject the elastic modulus image is being observed, which is 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、
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。Further, the reflectance tomographic image and the elastic modulus image displayed on the image display device have luminances of different colors,
When both images are displayed in a superimposed manner on the same screen, it is possible to understand at a glance which part of the inside of the subject the elastic modulus image is being observed, and which part of the biological tissue is anatomically identified. It is easy to judge whether it is hard or 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。Further, in the reflectance tomographic image and the elastic modulus image displayed on the image display device, the ultrasonic scanning direction into the subject is constant, and the ultrasonic reflectance and elasticity of the living tissue in the scanning line direction are constant. When the rate is measured and displayed with the brightness according to the ultrasonic reflectance and the brightness according to the elastic modulus over time, the ultrasonic modulus and the elastic modulus in the depth direction of the diagnostic site Understand the relationship with large parts of.
【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。FIG. 1 is a block diagram showing an embodiment of an ultrasonic 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。FIG. 2 is an explanatory diagram showing a state in which a transmission timing is generated by a transmission control circuit of the ultrasonic diagnostic apparatus according to a reflectance measurement time phase and an elastic modulus measurement time 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。FIG. 3 is an explanatory diagram showing a reflectance tomographic image and an elastic modulus image of a diagnostic region 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。FIG. 4 is an explanatory diagram showing another embodiment of displaying reflectance tomographic images and elastic modulus images on an 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 diagram showing still another embodiment of displaying a reflectance tomographic image and an elastic modulus image on an image display device.
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 1 ... Probe 1 2 ... Transmitting pulse generator 3 ... Transmit / receive separation circuit 4 Low frequency oscillator 5 ... Vibrator 6 ... Transmission control circuit 7 ... Phasing circuit 8 ... Reflection / elasticity discrimination circuit 9 ... Reflectance calculation circuit 10 ... Elastic modulus calculation circuit 11 ... Scan converter 12 ... Image display device 13 ... Subject 14 ... Scan line A: High reflectance area B ... A part with a large elastic modulus
Claims (3)
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ことを特徴とする超音波診断装置。1. A probe for transmitting and receiving ultrasonic waves to and from a subject, a phasing means for receiving a reflection echo signal from the inside of the subject, performing delay processing, and aligning and adding the phases, and the phasing means. Means for calculating the ultrasonic reflectance of the biological tissue by inputting the phasing output signal from the device, means for calculating the elastic modulus of the biological tissue by inputting the phasing output signal, and calculation from each of these calculating means A scan converter that inputs an output signal to create image data, and an image display device that displays the image data from the scan converter as an ultrasonic image are provided.
An ultrasonic diagnostic apparatus characterized in that a reflectance tomographic image and an elastic modulus image of a diagnostic region in a subject are measured simultaneously or alternately and these are displayed on the same screen of an image display device.
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。2. The reflectance tomographic image and the elastic modulus image displayed on the image display device have luminances of different colors, and both images are displayed in a superimposed manner on the same screen. 1. The ultrasonic diagnostic apparatus according to 1.
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。3. The reflectance tomographic image and the elastic modulus image displayed on the image display device have a constant ultrasonic scanning direction into the subject, and the ultrasonic reflectance and elasticity of the biological tissue in the scanning line direction. The ultrasonic diagnostic apparatus according to claim 1, wherein the ratio is measured and displayed with the brightness according to the ultrasonic reflectance and the brightness according to the elasticity over time.
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|---|---|---|---|
| JP23370698A JP4201396B2 (en) | 1998-08-20 | 1998-08-20 | Ultrasonic diagnostic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23370698A JP4201396B2 (en) | 1998-08-20 | 1998-08-20 | Ultrasonic diagnostic equipment |
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|---|---|---|---|
| JP2008228186A Division JP4498451B2 (en) | 2008-09-05 | 2008-09-05 | Ultrasonic diagnostic equipment |
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|---|---|
| JP2000060853A true JP2000060853A (en) | 2000-02-29 |
| JP2000060853A5 JP2000060853A5 (en) | 2005-11-04 |
| JP4201396B2 JP4201396B2 (en) | 2008-12-24 |
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