JPS62117536A - Judgement of tissue properties in ultrasonic diagnostic apparatus - Google Patents
Judgement of tissue properties in ultrasonic diagnostic apparatusInfo
- Publication number
- JPS62117536A JPS62117536A JP25914785A JP25914785A JPS62117536A JP S62117536 A JPS62117536 A JP S62117536A JP 25914785 A JP25914785 A JP 25914785A JP 25914785 A JP25914785 A JP 25914785A JP S62117536 A JPS62117536 A JP S62117536A
- Authority
- JP
- Japan
- Prior art keywords
- regions
- tissue properties
- frequency
- ultrasound
- echo signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52036—Details of receivers using analysis of echo signal for target characterisation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/895—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques characterised by the transmitted frequency spectrum
- G01S15/8952—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques characterised by the transmitted frequency spectrum using discrete, multiple frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、超音波診断装置における組織性状の判定方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for determining tissue properties in an ultrasonic diagnostic apparatus.
（ロ）従来技術とその問題点
一般に、超音波診断装置では、トランスジューサから超
音波を生体内に放射し、生体内の各部の音響インピーダ
ンスの差に応じて反射されたそのエコーを再びトランス
ジューサで受波し、受波して得られるエコー信号を輝度
変調することにより断層像をＣＲＴ等に表示する。(b) Prior art and its problems In general, in an ultrasound diagnostic device, a transducer emits ultrasonic waves into a living body, and the transducer receives the reflected echoes according to the differences in acoustic impedance of various parts of the living body. A tomographic image is displayed on a CRT or the like by modulating the luminance of the echo signal obtained by transmitting and receiving waves.
ところで、従来の組織性状の判定は、専らＳＴＣ調整後
の断層像の濃淡を観察することによって、医師が行なっ
ている。生体内に放射された超音波は、生体内の深さ方
向の距離とその組織性状に応じた吸収減衰を受ける。生
体内の距離による超音波の吸収減衰の影響は、近距離で
はエコー信号のゲインを低くし、遠距離では深さに応じ
てゲインを高くする、いわゆるＳ Ｔ Ｃ（Ｓ ｅｎｓ
ｉｔｉｖｉｔｙ Ｔ ｉｍｅ Ｃｏｎｔｒｏｌ）によ
り補正することができる。したがって、ＳＴＣｉ１ｍ］
整後のエコー信号強度に対応した断層像の輝度の違いを
観察することによっである程度の組織性状の判定が可能
である。By the way, conventional tissue properties are determined by a doctor solely by observing the shading of a tomographic image after STC adjustment. Ultrasonic waves emitted into a living body undergo absorption attenuation depending on the depth of the living body and its tissue properties. The effect of absorption and attenuation of ultrasound due to distance within a living body is the so-called STC (Sens
This can be corrected using the Activity Time Control). Therefore, STCi1m]
By observing the difference in brightness of tomographic images corresponding to the echo signal intensity after adjustment, it is possible to determine the tissue properties to some extent.
しかしながら、このような判定は、専門的に高度な知識
と経験を必要とし、また、定１的な評価を行なうことが
できない。しかも、最終的には組織を切り取ってその良
否を確定する必要が生じるなど、患者に負担を強いるば
かりでなく、不要な労力を伴なっていた。However, such a determination requires a high level of professional knowledge and experience, and it is not possible to perform a fixed evaluation. Moreover, in the end, it becomes necessary to cut out the tissue and determine its quality, which not only imposes a burden on the patient but also involves unnecessary labor.
上述のごとく、生体内に放射された超音波は、その組織
性状に応じた吸収減衰を受けるが、その吸収減衰の程度
は送受波される超音波の周波数に依存する。すなわち、
同じ組織でも超音波の周波数によって吸収減衰する程度
が異なってくる。したがって、生体内の超音波の吸収最
の周波数依存性を調べることによって、組織性状を診断
することができる。As described above, ultrasonic waves emitted into a living body undergo absorption attenuation depending on the tissue properties thereof, and the degree of absorption attenuation depends on the frequency of the transmitted and received ultrasonic waves. That is,
Even in the same tissue, the degree of absorption and attenuation differs depending on the ultrasound frequency. Therefore, tissue properties can be diagnosed by examining the frequency dependence of ultrasound absorption in vivo.
本発明は、生体の組織性状が超音波周波数に依存すると
いうその特異性に着目し、超音波の吸収虫と周波数との
関係を求めることにより、生体内の組織性状をｉｎ ｖ
ｉｖｏで的確に判定できるようにすることを目的とする
。The present invention focuses on the peculiarity that the tissue properties of a living body depend on the ultrasonic frequency, and by determining the relationship between the ultrasonic absorption insects and the frequency, the tissue properties in the living body can be investigated in vitro.
The purpose is to enable accurate judgment using ivo.
（ハ）問題点を解決するための手段
本発明は、」二足の目的を達成するために、超音波診断
装置における組織性状の判定方法として、超音波を送受
波して得られるエコー信号を互いに周波数帯域の毘なる
複数のフィルタをそｆｌぞれ通過させて、各周波数ごと
のエコー信号に基づく断層像を得、次いでこれらの各断
層像について、その深さ方向に２つの領域を設定し５、
両領域のエコー信号強度の輝度の平均値が等（、くなる
ようにＳＴＣを調整した後、各領域におＩＪるゲイン設
定値をそれぞれ読み取り、読み取ったこイ］らの各ゲイ
ン設定値と両領域間の距離から両領域間の超音波の吸収
係数を算出し、面記エコー信号の周波数と吸収係数との
関係を求めるようにしている。(c) Means for Solving the Problems In order to achieve the two objectives, the present invention uses echo signals obtained by transmitting and receiving ultrasound as a method for determining tissue properties in an ultrasound diagnostic device. A tomographic image based on the echo signal of each frequency is obtained by passing each filter through a plurality of filters in different frequency bands, and then two regions are set in the depth direction for each of these tomographic images. 5,
After adjusting the STC so that the average value of the luminance of the echo signal intensity in both regions is equal (, read the gain setting values for each region respectively, The absorption coefficient of ultrasound between the two regions is calculated from the distance between the regions, and the relationship between the frequency of the surface echo signal and the absorption coefficient is determined.
（ニ）実施例
第１図は、本発明方法を適用するための超音波診断装置
のブロック図である。この超音波診断装置１により組織
性状を判定するには、まず、その前段階として、トラン
スジューサ２から生体内に超音波を放射し、生体内から
反射されたそのエコーをトランスジューサ２で受波する
。トランスジューサ２からは、受波した超音波エコーに
対応したエコー信号が出力されるので、このエコー信号
を送受波回路４で増幅、検波し、次いで、マルチプレク
サ６で互いに周波数帯域が異なる複数（本例では・１つ
）のバンドパスフィルタ８３〜８ｄの内の一つ、たとえ
ば第１バンドパスフイルタ８ａを選択し、選択した第１
バンドパスフイルタ８ａで所定の周波数帯域のエコー信
号のみを通過させる。(D) Embodiment FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus to which the method of the present invention is applied. In order to determine tissue properties using this ultrasonic diagnostic apparatus 1, first, as a preliminary step, the transducer 2 emits ultrasonic waves into the living body, and the transducer 2 receives the echoes reflected from the living body. Since the transducer 2 outputs an echo signal corresponding to the received ultrasound echo, this echo signal is amplified and detected by the wave transmitting/receiving circuit 4, and then the multiplexer 6 outputs a plurality of echo signals having different frequency bands (in this example). Then, one of the bandpass filters 83 to 8d, for example, the first bandpass filter 8a, is selected, and the selected first
A bandpass filter 8a passes only echo signals in a predetermined frequency band.
そして、第１バンドパスフイルタ８ａを通過したエコー
信号のゲインをＳＴＣ凋整回路１０によって超音波の深
さ方向の距離に対応させて調整した後、このエコー信号
を次段のＡ／ＤコンバータＩ２でデジタル化しごデジタ
ルスキャンコンバータ部１４のメモリに画像データとし
て格納する。After the gain of the echo signal that has passed through the first bandpass filter 8a is adjusted by the STC adjustment circuit 10 in accordance with the distance in the depth direction of the ultrasonic wave, this echo signal is sent to the next A/D converter I2. Then, the image is digitized and stored in the memory of the digital scan converter section 14 as image data.
こうしてデジタルスキャンコンバータ部１４に画像デー
タを格納すると、次に、演算制御部１６によりこれらの
画像データをＴＶ走査速度に同期して読み出し、この画
像データをＩ） ／ Ａコンバータ１８でアナログ化し
た後、ＣＲＴ ２０に断層像として表示する。When the image data is stored in the digital scan converter section 14 in this way, the arithmetic control section 16 reads out the image data in synchronization with the TV scanning speed, and after converting this image data into analog data using the I/A converter 18. , and displayed as a tomographic image on the CRT 20.
操作部２２から断層像をフリーズさせる指令信号を人力
すると、演算制御部１６は、第１バンドパスフイルタ８
ａを通過した一画面分の断層像を表示する画像データが
デジタルスキャンコンバータ部１４に洛納される。When a command signal to freeze the tomographic image is manually input from the operation unit 22, the arithmetic control unit 16 controls the first bandpass filter 8.
The image data displaying one screen's worth of tomographic images that has passed through a is delivered to the digital scan converter section 14.
次に、演算制御部１６からの制御信号により、マルチプ
レクサ６を切り換えて次の第２バンドパスフイルタ８ｂ
を選択し、上記と同じく断層像をフリーズさせてエコー
信号の周波数が異なる他の一画面分の画像データをデジ
タルスキャンコンバータ部Ｉ４に格納する。このように
して、第１１＜ンドパスフィルタ８ａから第４バンドパ
スフイルタ８ｄをそれぞれ通過したエコー信号に基づく
画像データをそれぞれフリーズしてデジタルスキャンコ
ンバータ部１４のメモリにすべて洛納する。Next, the multiplexer 6 is switched by the control signal from the arithmetic control section 16 to select the next second bandpass filter 8b.
is selected, the tomographic image is frozen in the same manner as above, and another screen worth of image data having a different echo signal frequency is stored in the digital scan converter section I4. In this way, the image data based on the echo signals that have passed through the 11th bandpass filter 8a to the 4th bandpass filter 8d are each frozen and stored in the memory of the digital scan converter section 14.
超音波周波数の異なるエコー信号に基づく断層像が得ら
れると、次に、これらの各断層像について、それぞれｍ
位距離当たりの吸収係数を求める。Once tomographic images based on echo signals with different ultrasonic frequencies are obtained, next, for each of these tomographic images, m
Find the absorption coefficient per position distance.
これには、まず、第２図に示すように、第１バンドパス
フイルタ８ａを通過して得られた一つの断層像Ｆ１をＣ
ＲＴ ２０に表示し、その断層像Ｆ、の深さ方向に２つ
の領域Ｉ、■を設定する。これには、操作部２２を操作
して演算制御部１６に領域指定信号を与え、ＣＲＴ ２
０に領域Ｉ、■指定用のフレームを表示するとともに、
そのフレームの大きさを各対象部位に応じて適宜拡大、
縮小するなどして調整される。To do this, first, as shown in FIG. 2, one tomographic image F1 obtained by passing through the first bandpass filter 8a is
RT 20, and two regions I and ■ are set in the depth direction of the tomographic image F. To do this, operate the operation section 22 to give an area designation signal to the arithmetic control section 16.
Area I is displayed at 0, and a frame for specifying is displayed.
The size of the frame is enlarged appropriately according to each target area,
It is adjusted by reducing the size.
次に、両頭域Ｉ、■のエコー信号強度の輝度の平均値を
測定する。これには、デジタルスキャンコンバータ部１
４に格納されている画像データについて、演算制御部１
６により、設定した各領域Ｉ、■内に存在するエコー信
号の強度値をピクセルごとに読み出してその領域内の強
度の平均値を算出することにより行なう。そして、両頭
域■、Ｈの輝度の平均値を比較し、輝度の平均値が等し
くない場合には、再度、第１バンドパスフイルタ８ａを
通過したエコー信号について、演算制御部Ｉ６から５Ｔ
（Ｊｌ整回路ｌＯに制御信号を与えることによりゲイン
を制御し、一画面分の画像データの各領域１．ＩＴにお
ける輝度が等しくなるように調整した後、この画像デー
タをフリーズする。Next, the average value of the luminance of the echo signal intensity in both head regions I and (2) is measured. This includes the digital scan converter section 1.
Regarding the image data stored in 4, the arithmetic control unit 1
6, the intensity value of the echo signal existing in each of the set regions I and 3 is read out for each pixel, and the average value of the intensity within that region is calculated. Then, the average values of the brightness of both head regions (■) and H are compared, and if the average values of brightness are not equal, the echo signal that has passed through the first bandpass filter 8a is again transmitted from the calculation control unit I6 to the 5T.
(The gain is controlled by giving a control signal to the Jl adjustment circuit IO, and the brightness in each area 1.IT of one screen of image data is adjusted to be equal, and then this image data is frozen.
こうして、両頭域１１ ■の輝度が等しくなるように調
整すると、そのＳ ’Ｉ’ Ｃ調整後の両頭域Ｉ、Ｈの
ゲイン設定値を読み取る。そして、読み取った各ゲイン
設定値と両頭域Ｉ、１間の距離から領域Ｉ、１間の超音
波の吸収係数を算出する６、すなわち、いま両頭域！、
ＩＩの各ゲイン設定値をＡ、、Ａ７、両頭域Ｉ、１間の
距離をＬとすると、単位距離当たりの吸収係数μは、次
式の関係で表わされる。In this way, when the brightness of the double head area 11 (1) is adjusted to be equal, the gain setting values of the double head area I and H after the S'I'C adjustment are read. Then, from each read gain setting value and the distance between the double head region I,1, the absorption coefficient of the ultrasound between the region I,1 is calculated6, that is, now the double head region! ,
Assuming that each gain setting value of II is A, A7, and the distance between the double head areas I and 1 is L, the absorption coefficient μ per unit distance is expressed by the following equation.
＋ｏｇ（Ａ！／ Ａ Ｉ） ＝μＬ よって、この式から吸収係数μが算出される。+og(A!/AI)=μL Therefore, the absorption coefficient μ is calculated from this equation.
上記動作を他のバンドパスフィルタ８ｂ〜８ｄを通過し
たエコー信号に基づいて得られる各断層像Ｆ、〜Ｆ４に
対して行なう。そして、各断層像Ｆ。The above operation is performed for each tomographic image F, -F4 obtained based on the echo signals that have passed through the other bandpass filters 8b-8d. And each tomographic image F.
〜Ｆ４の吸収係数μｍ〜μ４が算出されると、第３図に
示すように、たとえば横軸を各バンドパスフィルタ８ａ
〜８ｄを通過したエコー信号の各中心周波数ｆ１〜ｆい
縦軸を吸収係数μｍ〜μ４として両者の関係をプロット
すれば、組織性状を反映した特異な特性曲線が得られる
。すなわち、第３図中には一例として、肝臓の組織（実
線）と脂肪の組織（破線）についての周波数と吸収係数
との関係を示したが、このように、組織性状には、超音
波が吸収減衰される程度に特異な周波数依存性があるの
で、この種のデータを蓄積すれば、組織性状を容易に判
定することができる。When the absorption coefficients μm to μ4 of ~F4 are calculated, as shown in FIG.
If the relationship between the center frequencies f1 to f of the echo signals that have passed through 8d is plotted on the vertical axis as the absorption coefficients μm to μ4, a unique characteristic curve reflecting the tissue properties can be obtained. In other words, as an example, Figure 3 shows the relationship between frequency and absorption coefficient for liver tissue (solid line) and adipose tissue (broken line). Since there is a specific frequency dependence in the degree of absorption and attenuation, tissue properties can be easily determined by accumulating this type of data.
なお、この実施例では４つのバンドパスフィルタ８ａ〜
８ｄを設けているが、さらに多数のバンドパスフィルタ
を設ければ第３図の特性曲線が一層連続した曲線として
得られるようになる。Note that in this embodiment, four bandpass filters 8a to 8a are used.
8d, but if a larger number of bandpass filters are provided, the characteristic curve shown in FIG. 3 can be obtained as a more continuous curve.
（ホ）効果
以上のように本発明によれば、高度な専門的知識がなく
ても比較的簡単に超音波の吸収量と周波数との関係を求
めることができる。したがって、生体内の組織性状を従
来よりも一層的確にｉｎ ｖｉｖＯで判定できるように
なる等の優れた効果が発揮される。(E) Effects As described above, according to the present invention, the relationship between the amount of absorption of ultrasound and the frequency can be determined relatively easily even without advanced specialized knowledge. Therefore, excellent effects such as being able to determine in vivo tissue properties more accurately than before can be achieved.
第１図は本発明方法を適用するための超音波診断装置に
ブロック図、第２図は本発明方法の説明図、第３図は超
音波の吸収量と周波数との関係を示す組織性状の特性図
である。
１・・・超音波診断装置、Ｉ、■ ・領域。Fig. 1 is a block diagram of an ultrasonic diagnostic apparatus to which the method of the present invention is applied, Fig. 2 is an explanatory diagram of the method of the present invention, and Fig. 3 is a diagram of tissue properties showing the relationship between the amount of ultrasound absorption and frequency. It is a characteristic diagram. 1...Ultrasonic diagnostic equipment, I, ■ area.
Claims (1)
周波数帯域の異なる複数のフィルタをそれぞれ通過させ
て、各周波数ごとのエコー信号に基づく断層像を得、次
いでこれらの各断層像について、その深さ方向に２つの
領域を設定し、両領域のエコー信号強度の輝度の平均値
が等しくなるようにＳＴＣを調整した後、各領域におけ
るゲイン設定値をそれぞれ読み取り、読み取ったこれら
の各ゲイン設定値と両領域間の距離から両領域間の超音
波の吸収係数を算出し、前記エコー信号の周波数と吸収
係数との関係を求めることを特徴とする超音波診断装置
における組織性状の判定方法。(1) Echo signals obtained by transmitting and receiving ultrasound are passed through multiple filters with different frequency bands to obtain tomographic images based on the echo signals for each frequency, and then for each of these tomographic images, After setting two regions in the depth direction and adjusting the STC so that the average value of the luminance of the echo signal intensity in both regions is equal, the gain settings in each region are read respectively, and each of these read gains A method for determining tissue properties in an ultrasonic diagnostic apparatus, characterized by calculating an absorption coefficient of ultrasound between both regions from a set value and a distance between both regions, and determining a relationship between the frequency of the echo signal and the absorption coefficient. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60259147A JP2825091B2 (en) | 1985-11-18 | 1985-11-18 | Method for measuring frequency dependence of ultrasonic absorption coefficient in ultrasonic diagnostic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60259147A JP2825091B2 (en) | 1985-11-18 | 1985-11-18 | Method for measuring frequency dependence of ultrasonic absorption coefficient in ultrasonic diagnostic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62117536A true JPS62117536A (en) | 1987-05-29 |
| JP2825091B2 JP2825091B2 (en) | 1998-11-18 |
Family
ID=17329986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60259147A Expired - Fee Related JP2825091B2 (en) | 1985-11-18 | 1985-11-18 | Method for measuring frequency dependence of ultrasonic absorption coefficient in ultrasonic diagnostic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2825091B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007113692A3 (en) * | 2006-03-31 | 2008-12-24 | Aloka Co Ltd | Methods and apparatus for ultrasound imaging |
| WO2016157624A1 (en) * | 2015-03-31 | 2016-10-06 | オリンパス株式会社 | Ultrasonic observation apparatus, operating method of ultrasonic observation apparatus, and operating program for ultrasonic observation apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5070083A (en) * | 1973-05-03 | 1975-06-11 | ||
| JPS6024829A (en) * | 1983-07-21 | 1985-02-07 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
| JPS6029137A (en) * | 1983-07-27 | 1985-02-14 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
| JPS60203090A (en) * | 1984-03-27 | 1985-10-14 | Shimadzu Corp | Picture processor |
| JPS60212150A (en) * | 1984-04-06 | 1985-10-24 | 富士通株式会社 | Measurement of living body tissue characteristics by ultrasonic wave |
-
1985
- 1985-11-18 JP JP60259147A patent/JP2825091B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5070083A (en) * | 1973-05-03 | 1975-06-11 | ||
| JPS6024829A (en) * | 1983-07-21 | 1985-02-07 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
| JPS6029137A (en) * | 1983-07-27 | 1985-02-14 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
| JPS60203090A (en) * | 1984-03-27 | 1985-10-14 | Shimadzu Corp | Picture processor |
| JPS60212150A (en) * | 1984-04-06 | 1985-10-24 | 富士通株式会社 | Measurement of living body tissue characteristics by ultrasonic wave |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007113692A3 (en) * | 2006-03-31 | 2008-12-24 | Aloka Co Ltd | Methods and apparatus for ultrasound imaging |
| JP2009531107A (en) * | 2006-03-31 | 2009-09-03 | アロカ株式会社 | Method and apparatus for ultrasound imaging |
| US8313436B2 (en) | 2006-03-31 | 2012-11-20 | Hitachi Aloka Medical, Ltd. | Methods and apparatus for ultrasound imaging |
| US8591418B2 (en) | 2006-03-31 | 2013-11-26 | Hitachi Aloka Medical, Ltd. | Methods and apparatus for ultrasound imaging |
| WO2016157624A1 (en) * | 2015-03-31 | 2016-10-06 | オリンパス株式会社 | Ultrasonic observation apparatus, operating method of ultrasonic observation apparatus, and operating program for ultrasonic observation apparatus |
| JPWO2016157624A1 (en) * | 2015-03-31 | 2017-06-08 | オリンパス株式会社 | Ultrasonic observation apparatus, operation method of ultrasonic observation apparatus, and operation program of ultrasonic observation apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2825091B2 (en) | 1998-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4646748A (en) | Ultrasonic measurement method, and apparatus therefor | |
| JP4405017B2 (en) | Method and apparatus for automatic time and / or lateral gain compensation in B-mode ultrasound imaging | |
| KR100749973B1 (en) | Prf adjustment method and apparatus, and ultrasonic wave imaging apparatus | |
| US4785402A (en) | Ultrasonic imaging apparatus for color display of flow velocity | |
| US5383463A (en) | Mapping of flow parameters | |
| JPH0227631B2 (en) | ||
| US6302847B1 (en) | Two dimensional ultrasonic scanning system and method | |
| KR100380913B1 (en) | Ultrasound imaging mehtod and apparatus for isolating noise from signal by using variable power threshold | |
| US5404883A (en) | Gray scale windowing | |
| JPH0654850A (en) | Ultrasonic diagnostic device | |
| JPS62117536A (en) | Judgement of tissue properties in ultrasonic diagnostic apparatus | |
| JP3943653B2 (en) | Ultrasonic diagnostic equipment | |
| JP2001327492A (en) | Ultrasonic diagnostic apparatus | |
| JPS60232138A (en) | Object scanner by ultrasonic echography | |
| US5081996A (en) | Ultrasonic imaging apparatus | |
| JP2674005B2 (en) | Ultrasound diagnostic equipment | |
| JPH10314170A (en) | Ultrasonic diagnostic device | |
| JPH0360493B2 (en) | ||
| JPH056969Y2 (en) | ||
| JPS62117537A (en) | Measurement of ultrasonic absorbing amount in ultrasonic diagnostic apparatus | |
| JP3262169B2 (en) | Ultrasound diagnostic equipment | |
| JP2760550B2 (en) | Ultrasound diagnostic equipment | |
| JPH04224739A (en) | Ultrasonic tomographic apparatus | |
| JPH0411172Y2 (en) | ||
| JPS6141215B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |