JP2909757B2 - Ultrasound diagnostic equipment - Google Patents
Ultrasound diagnostic equipmentInfo
- Publication number
- JP2909757B2 JP2909757B2 JP2070992A JP7099290A JP2909757B2 JP 2909757 B2 JP2909757 B2 JP 2909757B2 JP 2070992 A JP2070992 A JP 2070992A JP 7099290 A JP7099290 A JP 7099290A JP 2909757 B2 JP2909757 B2 JP 2909757B2
- Authority
- JP
- Japan
- Prior art keywords
- sound ray
- diagnostic apparatus
- ultrasonic diagnostic
- probe
- delay
- 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.)
- Expired - Lifetime
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] この発明は、超音波診断装置に関し、さらに詳しく
は、複数音線の同時受信を行う超音波診断装置における
音線密度の不均一性の改善に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus, and more particularly, to an improvement in non-uniformity of sound ray density in an ultrasonic diagnostic apparatus that simultaneously receives a plurality of sound rays. About.
[従来の技術] 第4図は、同時2音線受信可能な従来の超音波診断装
置51のブロック図である。[Prior Art] FIG. 4 is a block diagram of a conventional ultrasonic diagnostic apparatus 51 capable of simultaneously receiving two sound rays.
この超音波診断装置51において、スキャンコントロー
ラ59,送信用遅延回路53,ドライバ4およびプローブ2に
より、第5図に破線で示すように、プローブ2に直角な
送信音線SLを形成し、時刻が変る毎に、第6図に破線で
示すように、送信音線SLを移動させる。In the ultrasonic diagnostic apparatus 51, a transmission sound ray SL perpendicular to the probe 2 is formed by the scan controller 59, the transmission delay circuit 53, the driver 4, and the probe 2 as shown by a broken line in FIG. Each time it changes, the transmission sound ray SL is moved as shown by the broken line in FIG.
共通の遅延回路55および56と,くさび形特性を持つ個
別の遅延回路57aおよび57bと,個別の遅延回路62aおよ
び62bにより、第5図に示すように、送信音線SLと位置
が角度θだけ異なる2つの受信音線RLを同時に形成す
る。共通の遅延回路56は可変遅延回路であり、スキャン
コントローラ59により深さにトラッキングしてフォーカ
ス距離を変化させられる。By the common delay circuits 55 and 56, the individual delay circuits 57a and 57b having wedge-shaped characteristics, and the individual delay circuits 62a and 62b, as shown in FIG. Two different reception sound rays RL are formed simultaneously. The common delay circuit 56 is a variable delay circuit, and can track the depth by the scan controller 59 to change the focus distance.
同時に得られた2つの受信音線RLの受信データは、そ
れぞれ信号処理回路58aおよび58bで処理され、DSC60に
送られる。The received data of the two received sound rays RL obtained at the same time are processed by the signal processing circuits 58a and 58b, respectively, and sent to the DSC 60.
DSC60は、得られた受信データにより画像を形成し、C
RT11に断層像を画像表示する。DSC60 forms an image with the obtained reception data,
Display a tomographic image on RT11.
[発明が解決しようとする課題] 上記従来の超音波診断装置51において、送信音線SLと
受信音線RLとを総合した総合音線TLは、第5図に示すよ
うに、送信音線SLと受信音線RLの中間に位置し、送信音
線SLと角度θ/2だけ異なる指向性を持っている。[Problems to be Solved by the Invention] In the conventional ultrasonic diagnostic apparatus 51, the total sound ray TL obtained by integrating the transmission sound ray SL and the reception sound ray RL is, as shown in FIG. And the receiving sound ray RL, and has directivity different from the transmitting sound ray SL by an angle θ / 2.
このため、断層像全体を考えると、第6図に示すよう
に、総合音線TLの密度が不均一となり、均一な分解能が
得られない問題点がある。For this reason, considering the entire tomographic image, as shown in FIG. 6, there is a problem that the density of the total sound ray TL becomes non-uniform and a uniform resolution cannot be obtained.
また、この総合音線密度の不均一性を考慮しないと画
像に歪みを生じるが、これを考慮した信号処理は非常に
複雑となる問題点がある。Also, if the non-uniformity of the total sound ray density is not taken into account, the image will be distorted, but there is a problem that the signal processing taking this into account becomes very complicated.
そこで、この発明の目的は、均一な音線密度で同時複
数音線受信を行うことが出来る超音波診断装置を提供す
ることにある。Accordingly, an object of the present invention is to provide an ultrasonic diagnostic apparatus capable of simultaneously receiving a plurality of sound rays with a uniform sound ray density.
[課題を解決するための手段] この発明の超音波診断装置は、共通の遅延回路とくさ
び形特性をもつ個別の遅延回路により超音波の送信音線
とやや位置の異なる複数の受信音線を形成して、同時複
数音線受信を行う超音波診断装置において、個別の遅延
回路のくさび形特性の深さを生体深部になるほど小さく
して、超音波の送信音線と略平行でやや位置が異なる受
信音線を形成させる遅延回路制御手段を具備したことを
構成上の特徴とするものである。[Means for Solving the Problems] An ultrasonic diagnostic apparatus according to the present invention uses a common delay circuit and individual delay circuits having wedge-shaped characteristics to transmit a plurality of reception sound rays slightly different from ultrasonic transmission sound rays. In an ultrasonic diagnostic apparatus that performs simultaneous multiple sound ray reception, the depth of the wedge-shaped characteristic of each individual delay circuit is made smaller as it goes deeper into the body, and the position is slightly parallel to the transmitted sound ray of the ultrasonic wave. The configuration is characterized by including a delay circuit control means for forming different reception sound rays.
[作用] この発明の超音波診断装置では、遅延回路制御手段
が、個別の遅延回路のくさび型特性の深さを、生体深部
になるほど小さくなるように制御する。[Operation] In the ultrasonic diagnostic apparatus of the present invention, the delay circuit control means controls the depth of the wedge-shaped characteristic of each individual delay circuit such that the depth decreases as the depth of the living body increases.
このため、受信音線のステアリング角度が生体浅部で
は大きく,生体深部では小さくなるから、送信音線と略
平行に受信音線を形成できるようになる。Therefore, the steering angle of the reception sound ray is large in the shallow part of the living body and small in the deep part of the living body, so that the reception sound ray can be formed substantially parallel to the transmission sound ray.
従って、総合音線が相互に略平行となり、音線密度を
均一にできる。Therefore, the total sound rays become substantially parallel to each other, and the sound ray density can be made uniform.
[実施例] 以下、図に示す実施例に基づいてこの発明をさらに詳
しく説明する。なお、これによりこの発明が限定される
ものではない。[Example] Hereinafter, the present invention will be described in more detail based on an example shown in the drawings. It should be noted that the present invention is not limited by this.
第1図は、この発明の一実施例の超音波診断装置1の
ブロック図である。FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus 1 according to one embodiment of the present invention.
この超音波診断装置1において、スキャンコントロー
ラ9,送信用遅延回路3,ドライバ4およびプローブ2によ
って、第2図(b)に破線で示すように、プローブ2に
直角な方向に送信音線SLが形成され、時刻によりこの送
信音線SLが移動される。In the ultrasonic diagnostic apparatus 1, a transmission sound ray SL is formed by the scan controller 9, the transmission delay circuit 3, the driver 4, and the probe 2 in a direction perpendicular to the probe 2 as shown by a broken line in FIG. The transmission sound ray SL is formed and moved according to time.
共通の遅延回路5および6と,個別の遅延回路7aおよ
び7bと,個別の遅延回路12aおよび12bにより、送信音線
SLとやや角度の異なる2方向から超音波エコー信号を受
信する。The transmission sound ray is provided by the common delay circuits 5 and 6, the individual delay circuits 7a and 7b, and the individual delay circuits 12a and 12b.
Ultrasonic echo signals are received from two directions slightly different in angle from SL.
共通の遅延回路6は可変遅延回路であり、スキャンコ
ントローラ9が、生体深部になるほどフォーカス距離が
大きくなるように遅延時間を制御する。The common delay circuit 6 is a variable delay circuit, and the scan controller 9 controls the delay time so that the focus distance increases as the depth of the living body increases.
個別の遅延回路7a,7bはやはり可変遅延回路であり、
第2図(a)に示すように、くさび型特性の深さが生体
浅部では大きく,生体深部では小さくなるように、スキ
ャンコントローラ9が遅延時間を制御する。そこで、第
2図(b)に示すように、受信方向のステアリング角度
は、生体浅部では大きく(θs),生体深部では小さく
(θd)となる。The individual delay circuits 7a and 7b are also variable delay circuits,
As shown in FIG. 2 (a), the scan controller 9 controls the delay time so that the depth of the wedge-shaped characteristic is large in the shallow part of the living body and small in the deep part of the living body. Therefore, as shown in FIG. 2 (b), the steering angle in the receiving direction is large (θs) in the shallow part of the living body and small (θd) in the deep part of the living body.
かくして、共通の遅延回路6によるフォーカス距離を
適切に変えることにより、送信音線SLと略平行な受信音
線RLを形成することが出来る。Thus, the reception sound ray RL substantially parallel to the transmission sound ray SL can be formed by appropriately changing the focus distance by the common delay circuit 6.
そして、送信音線SLと受信音線RLとを総合した総合音
線TLは、送信音線SLの近傍で略平行となり、第3図に示
すように、断層像における総合音線TLは相互に平行で、
均一な密度となる。Then, the total sound ray TL obtained by integrating the transmission sound ray SL and the reception sound ray RL becomes substantially parallel in the vicinity of the transmission sound ray SL, and as shown in FIG. Parallel,
A uniform density results.
信号処理回路8aおよび8bは、送信音線SLの両側の受信
音線RLについてそれぞれ信号処理を行い、DSC10に出力
する。The signal processing circuits 8a and 8b perform signal processing on the reception sound ray RL on both sides of the transmission sound ray SL, and output the result to the DSC 10.
DSC10は、得られたデータを画像化し、CRT11に画像表
示する。The DSC 10 images the obtained data and displays the image on the CRT 11.
以上の説明から理解されるように、この超音波診断装
置1によれば、音線密度が均一となるから、分解能が均
一となる。そして、画像化処理も簡単になり、画像の歪
みを生じない。As understood from the above description, according to the ultrasonic diagnostic apparatus 1, since the sound ray density is uniform, the resolution is uniform. Further, the imaging process is simplified, and no image distortion occurs.
他の実施例としては、通信音線SLを移動させる他の走
査方式(例えばコンベックス走査)にこの発明を適用し
たものが挙げられる。As another embodiment, there is one in which the present invention is applied to another scanning method (for example, convex scanning) for moving the communication sound ray SL.
[発明の効果] この発明の超音波診断装置によれば、音線密度を均一
性を改善でき、均一な分解能を得ることができるように
なる。また、信号処理が簡単となり、画像の歪みを生じ
ないようになる。[Effects of the Invention] According to the ultrasonic diagnostic apparatus of the present invention, the uniformity of sound ray density can be improved, and a uniform resolution can be obtained. In addition, signal processing is simplified, and image distortion does not occur.
第1図はこの発明の一実施例の超音波診断装置のブロッ
ク図、第2図(a)はくさび型特性の深さによる変化を
示す説明図、第2図(b)はステアリング角度の深さに
よる変化を示す説明図、第3図はこの発明による音線の
分布を示す説明図、第4図は従来の超音波診断装置の一
例のブロック図、第5図は第4図に示す従来装置におけ
るステアリング角度の説明図、第6図は第4図に示す従
来装置における音線の分布を示す説明図である。 (符号の説明) 1……超音波診断装置 2……プローブ 5……共通の受信用遅延回路(固定) 6……共通の受信用遅延回路(可変) 7a,7b……くさび型特性を持つ個別の受信用遅延回路
(可変) 12a,12b……個別の受信用遅延回路(固定) 9……スキャンコントローラ SL……送信音線 RL……受信音線 TL……総合音線 θs,θd……ステアリング角度。FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus according to one embodiment of the present invention, FIG. 2 (a) is an explanatory diagram showing a change in wedge-shaped characteristics with depth, and FIG. 2 (b) is a steering angle depth. FIG. 3 is an explanatory diagram showing the distribution of sound rays according to the present invention, FIG. 4 is a block diagram of an example of a conventional ultrasonic diagnostic apparatus, and FIG. 5 is a conventional diagram shown in FIG. FIG. 6 is an explanatory diagram of a steering angle in the device, and FIG. 6 is an explanatory diagram showing a sound ray distribution in the conventional device shown in FIG. (Explanation of reference numerals) 1... Ultrasonic diagnostic apparatus 2... Probe 5... Common receiving delay circuit (fixed) 6... Common receiving delay circuit (variable) 7 a, 7 b. Individual receiving delay circuits (variable) 12a, 12b ... individual receiving delay circuits (fixed) 9 ... scan controller SL ... transmitting sound ray RL ... receiving sound ray TL ... total sound ray θs, θd ... ... the steering angle.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−120140(JP,A) 特開 昭59−225043(JP,A) 特開 昭58−138445(JP,A) (58)調査した分野(Int.Cl.6,DB名) A61B 8/00 - 8/15 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-120140 (JP, A) JP-A-59-225043 (JP, A) JP-A-58-138445 (JP, A) (58) Field (Int.Cl. 6 , DB name) A61B 8/00-8/15
Claims (1)
送受信することにより同時複数音線受信をする超音波診
断装置であって、 前記被検体の深さ方向に応じて受信フォーカスを変化さ
せるように前記プローブにより受信した信号を遅延させ
る第1の遅延手段と、 前記第1の遅延手段により遅延した信号を受け取る複数
の遅延手段であって、前記同時複数音線受信をするよう
に各々がくさび形の遅延特性を有するとともに前記深さ
方向に応じて前記プローブに対する受信音線の角度を変
化させるように各々の該くさび形の遅延特性が変化する
第2の遅延手段とを備えたことを特徴とする超音波診断
装置。An ultrasonic diagnostic apparatus for simultaneously receiving a plurality of sound rays by transmitting and receiving ultrasonic waves to and from a subject using a probe, wherein a reception focus is changed according to a depth direction of the subject. First delay means for delaying a signal received by the probe so as to cause the plurality of delay means to receive the signal delayed by the first delay means. Second delay means having a wedge-shaped delay characteristic and changing each of the wedge-shaped delay characteristics so as to change the angle of the received sound ray with respect to the probe in accordance with the depth direction. An ultrasonic diagnostic apparatus characterized by the above-mentioned.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2070992A JP2909757B2 (en) | 1990-03-20 | 1990-03-20 | Ultrasound diagnostic equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2070992A JP2909757B2 (en) | 1990-03-20 | 1990-03-20 | Ultrasound diagnostic equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03272749A JPH03272749A (en) | 1991-12-04 |
JP2909757B2 true JP2909757B2 (en) | 1999-06-23 |
Family
ID=13447550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2070992A Expired - Lifetime JP2909757B2 (en) | 1990-03-20 | 1990-03-20 | Ultrasound diagnostic equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2909757B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003010182A (en) * | 2001-06-19 | 2003-01-14 | Ge Medical Systems Global Technology Co Llc | Ultrasonographic method and ultrasonographic device |
-
1990
- 1990-03-20 JP JP2070992A patent/JP2909757B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03272749A (en) | 1991-12-04 |
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