JPS6155380B2 - - Google Patents
Info
- Publication number
- JPS6155380B2 JPS6155380B2 JP53147258A JP14725878A JPS6155380B2 JP S6155380 B2 JPS6155380 B2 JP S6155380B2 JP 53147258 A JP53147258 A JP 53147258A JP 14725878 A JP14725878 A JP 14725878A JP S6155380 B2 JPS6155380 B2 JP S6155380B2
- Authority
- JP
- Japan
- Prior art keywords
- acoustic impedance
- silicone rubber
- resolution
- phantom
- water
- 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
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- Ultra Sonic Daignosis Equipment (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は超音波診断装置による画像の優劣の判定
を目的とする、音響特性的に生体に類似した構造
模型（以下、フアントムと称す。）に関するもの
である。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a structural model (hereinafter referred to as a phantom) that is similar to a living body in terms of acoustic characteristics and is used for the purpose of determining the quality of images obtained by an ultrasound diagnostic device. It is something.
従来、超音波診断装置、特に被検体内の一断面
像として超音波の反響像をCRT等の表示装置に
表示するＢモード用超音波診断装置の分解能、感
度等のような装置の性能を測定評価する試験が実
施されている。この試験の実施に際し、場所及び
試験実施者等の制約を受けることがないように超
音波送波対象としてフアントムを採用している。
Conventionally, the performance of ultrasonic diagnostic equipment such as resolution and sensitivity of ultrasonic diagnostic equipment, especially B-mode ultrasound diagnostic equipment that displays ultrasound echo images on a display device such as a CRT as a cross-sectional image inside the subject, has been measured. An evaluation test is being conducted. When carrying out this test, a phantom is used as the object for transmitting ultrasonic waves so that there are no restrictions on the location or the person conducting the test.
第１図に示すように従来のフアントムは、アク
リル樹脂等の材料よりなる容器１（枠）の内部
に、ダミーとなるナイロンあるいはスチール製タ
ーゲツト糸２を分解能、感度等の試験目的に応じ
て、各々配置配列した後、固定したものである。
この場合、このターゲツト糸２は超音波を送・受
波するプローブ３の超音波による送受波方向図中
矢印Ｓと略直角となるように配置される。また、
これら容器１にターゲツト糸２が所定位置に固定
されたフアントムを実際の試験時には水中に沈
め、プローブ３とフアントム間の中間超音波伝達
媒体として水を採用している。 As shown in Fig. 1, the conventional Phantom has a dummy target thread 2 made of nylon or steel placed inside a container 1 (frame) made of a material such as acrylic resin, depending on the purpose of the test such as resolution or sensitivity. After each arrangement is arranged, it is fixed.
In this case, the target thread 2 is arranged so as to be approximately perpendicular to the arrow S in the diagram in the direction of transmission and reception of ultrasonic waves by the probe 3 that transmits and receives ultrasonic waves. Also,
During actual testing, the phantoms with the target threads 2 fixed at predetermined positions in the containers 1 are submerged in water, and water is used as an intermediate ultrasonic transmission medium between the probe 3 and the phantoms.
測定項目には、主に距離分解能、方位分解能、
更に感度の３項目あり、距離分解能とは、超音波
プローブ３の超音波送波方向についての分解能で
あり、第１図中の送受波方向に平行な複数のター
ゲツト系間距離Ａをいろいろな値に設定して置
き、実際に超音波プローブ３より送波された超音
波の送査によつて得られるフアントムのＢモード
像により判断される。方位分解能については、前
記距離分解能とは直角方向の分解能であり、送波
超音波ビームの太さに起因するものである。方位
分解能の判定は、前記方向超音波送波方向とは直
角な方向において平行な複数のターゲツト糸間距
離Ｂをいろいろ設定して置き、前述同様の検査方
法を行なう。感度については、第１図中超音波送
波方向と平行なＣのような方向に所定間隔で複数
のターゲツト糸を分散した状態で設定し、前述と
同じように超音波プローブ３による走査を行ない
得られるフアントムのＢモード像を観察し、送波
超音波の減衰度合を測定、判定するものである。 Measurement items mainly include distance resolution, azimuth resolution,
Furthermore, there are three items of sensitivity. Distance resolution is the resolution in the ultrasonic wave transmission direction of the ultrasound probe 3, and the distance A between multiple target systems parallel to the wave transmission and reception direction in Fig. 1 can be set to various values. The determination is made based on a B-mode image of the phantom obtained by actually transmitting ultrasound waves from the ultrasound probe 3. Regarding the azimuth resolution, the distance resolution is the resolution in the perpendicular direction, and is caused by the thickness of the transmitted ultrasonic beam. The azimuth resolution is determined by setting various distances B between a plurality of parallel target yarns in a direction perpendicular to the ultrasonic wave transmission direction, and performing the same inspection method as described above. Regarding sensitivity, we set a plurality of target threads dispersed at predetermined intervals in the direction C parallel to the ultrasound transmission direction in Figure 1, and scanned them with the ultrasound probe 3 in the same way as described above. The B-mode image of the phantom is observed, and the degree of attenuation of the transmitted ultrasonic wave is measured and determined.
しかし、従来のダミーとして使用されていた、
ナイロン製糸、及びスチール製系の音響インピー
ダンスは、各々2.860×106（Kg/m2、ｓ）45.04×
106（Kg/m2、ｓ）であり、人体の音響インピーダ
ンスが略水の音響インピーダンスと等しいと考え
た場合、1.480×106（Kg/m2、ｓ）となり人体の
音響インピーダンスとかなりの誤差を生じる。同
様に、前記ナイロン製糸、スチール製糸の反射
率、減衰率は水の反射率、減衰率とはかなりの差
がある。よつて、従来のように、実際の人体と音
響特性が異なるフアントムによつて得られた測定
検査結果を以つて、超音波診断装置の実際的、正
確な分解能、感度としてその装置の性能について
判断を下すことには大きな問題を生じる欠点があ
る。
However, conventionally used as a dummy,
The acoustic impedance of nylon yarn and steel is 2.860×10 6 (Kg/m 2 , s) 45.04×
10 6 (Kg/m 2 , s), and if we consider that the acoustic impedance of the human body is approximately equal to the acoustic impedance of water, it becomes 1.480×10 6 (Kg/m 2 , s), which is considerably different from the acoustic impedance of the human body. cause an error. Similarly, the reflectance and attenuation rate of the nylon yarn and steel yarn are significantly different from the reflectance and attenuation rate of water. Therefore, as in the past, the performance of an ultrasound diagnostic device can be judged in terms of its practical and accurate resolution and sensitivity using measurement test results obtained using a phantom whose acoustic characteristics differ from those of an actual human body. There are drawbacks to this that pose major problems.
本発明は前記欠点を解消し、実際の超音波診断
装置の検査対象とする人体のそれと略等しい水の
音響インピーダンスに類似したシリコンゴムによ
つて構成されるフアントムを提供することを目的
とする。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a phantom made of silicone rubber that has an acoustic impedance similar to that of water, which is approximately equal to that of a human body, which is an object to be examined by an actual ultrasonic diagnostic apparatus.
この目的を達成するために本発明は、水とほぼ
同じ音響インピーダンスを備えたシリコンゴムか
ら成る基準固定台と、この基準固定台内に、この
基準固定台とは音響インピーダンスの異なるシリ
コンゴムから成るダミーとを具備したことを特徴
とするものである。
In order to achieve this object, the present invention includes a reference fixing base made of silicone rubber having approximately the same acoustic impedance as water, and a reference fixing base made of silicone rubber having an acoustic impedance different from that of water. The device is characterized in that it is equipped with a dummy.
以下、図面を参照しながら本発明の一実施例に
ついて説明する。
An embodiment of the present invention will be described below with reference to the drawings.
シリコンゴムは有機ケイ素化合物の重合体のう
ち、ふつうジメチルシロキサンを開環重合させて
合成したものであり、その音響インピーダンスが
人の音響インピーダンスと非常に類似している。
例えば、東レシリコン(株)製造のSH―841U、851U
および861Uの音響インピーダンスを測定したと
ころ、1.282×106、1.405×106、1.516×106とな
り、水の1.480×106と略同様となり実際の人体を
被検査対象物体とした場合と同様の分解能、感度
について正確な判定が可能となる。更に超音波診
断装置による一般的診断部位である腹部のように
生体内部軟組織の音響インピーダンス差は一部分
の音響インピーダンスの約６％以内である。この
ような生体内部における音響インピーダンスの微
妙な変化に対し、シリコンゴムの合成成分の混合
比率を変えれば、容易にその音響インピーダンス
の差を約６％以内の多種類の音響インピーダンス
のシリコンゴムを製造することが可能であるた
め、生体内部の音響インピーダンスの変化に付随
したフアントムを構成することが可能となる。 Silicone rubber is a polymer of organosilicon compounds, usually synthesized by ring-opening polymerization of dimethylsiloxane, and its acoustic impedance is very similar to that of humans.
For example, SH-841U and 851U manufactured by Toray Silicon Co., Ltd.
When the acoustic impedance of 861U and 861U was measured, they were 1.282×10 6 , 1.405×10 6 , and 1.516×10 6 , which is almost the same as 1.480×10 6 of water, which is the same as when the actual human body is the object to be tested. Accurate determination of resolution and sensitivity becomes possible. Furthermore, the difference in acoustic impedance of soft tissue inside a living body such as the abdomen, which is a commonly diagnosed region using an ultrasonic diagnostic apparatus, is within about 6% of the acoustic impedance of a portion. In response to such subtle changes in acoustic impedance inside the living body, by changing the mixing ratio of the synthetic components of silicone rubber, it is possible to easily produce silicone rubber with various types of acoustic impedance that keep the difference in acoustic impedance within about 6%. Therefore, it is possible to construct a phantom that follows changes in acoustic impedance inside the living body.
第２図において、ほとんど水の音響インピーダ
ンスと等しいシリコンゴムよりなる基準固定台内
４に、それとは音響インピーダンスが異なる多数
の棒状シリコンゴム５をダミーとして設けて、超
音波プローブ３の超音波送波方向に配列した感度
測定部Ｄを形成する。更にダミーとして人体内部
臓器壁の音響インピーダンスと等しい任意音響イ
ンピーダンスを有する円筒状シリコンゴム６内
に、各々その音響インピーダンスが円筒状シリコ
ンゴム６のそれと比較し、その誤差が約６％以内
となる複数の棒状シリコンゴム７を挿入した測定
部Ｅを形成してもよい。また深さによる分解能の
変化を調べるために基準固定台５内に超音波プロ
ーブ３の超音波走査方向に直角で、かつ異なる深
さに、音響インピーダンスがそれぞれ等しい棒状
シリコンゴム８をダミーとして配置した分解能測
定部Ｆ等を形成してもよい。 In FIG. 2, a large number of rod-shaped silicone rubbers 5 having different acoustic impedances are provided as dummies in a reference fixing base 4 made of silicone rubber, which has almost the same acoustic impedance as water, to transmit ultrasonic waves from the ultrasonic probe 3. Sensitivity measuring sections D arranged in the direction are formed. Further, as a dummy, a plurality of cylindrical silicone rubber 6 having an arbitrary acoustic impedance equal to the acoustic impedance of the internal organ wall of the human body are provided, each of which has an acoustic impedance within about 6% when compared with that of the cylindrical silicone rubber 6. A measuring section E may be formed into which a rod-shaped silicone rubber 7 is inserted. In addition, in order to examine the change in resolution due to depth, dummies of rod-shaped silicone rubber 8 with the same acoustic impedance were placed at different depths at right angles to the ultrasonic scanning direction of the ultrasonic probe 3 in the reference fixing table 5. A resolution measuring section F or the like may be formed.
以上述べたように、本発明のフアントムによれ
ば、例えば、東レシリコンゴム(株)製造のSH−
841V、−851V、および861Vのような、人体、す
なわち水の音響インピーダンスと略等しい音響イ
ンピーダンスを有する材料で、且つ、その各合成
成分の合成比を考慮することにより、任意成分の
シリコンゴムの音響インピーダンスを基準とし、
その差が約６％以内に含まれる多種のシリコンゴ
ムを製造でき、これら非常に人体の音響インピー
ダンスに類似し、更に、人体内と略同様にその音
響インピーダンスが近似しており、誤差が約６％
以内となるフアントムを形成できる。したがつ
て、本発明のフアントムを使用すれば、実際の人
体に対する場合と略同様の対象となるため、この
ような対象を利用しての検査測定を行なえば、検
査で得られた結果を十分、信頼できる利点があ
る。また、シリコンゴムはその成形性に秀れてい
るため、任意形状の部材を作成できるため、人体
臓器、及びその構成部の形状に類似して成形でき
る。更に、従来、ダミーは水中に入れなければな
らなかつたが、本発明によれば水とほぼ等しい音
響インピーダンスを有するシリコンゴムからなる
基準固定台中に設けられることになる。従つて、
水を使用する必要がないので取り扱いが簡単であ
る。しかも超音波プローブ内に水が浸入して超音
波プローブが損傷することはない。
As described above, according to the phantom of the present invention, for example, SH-
The acoustics of silicone rubber, which is a material with an acoustic impedance approximately equal to the acoustic impedance of the human body, i.e., water, such as 841V, -851V, and 861V, and which is an arbitrary component by considering the composition ratio of each composite component. Based on impedance,
It is possible to manufacture various types of silicone rubber with a difference within about 6%, which is very similar to the acoustic impedance of the human body. %
It is possible to form a phantom within the following range. Therefore, if the phantom of the present invention is used, the target will be approximately the same as that of an actual human body, so if inspection and measurement are performed using such a target, the results obtained from the test will be sufficiently accurate. , has reliable advantages. Furthermore, since silicone rubber has excellent moldability, members with arbitrary shapes can be created, so that they can be molded to resemble the shapes of human organs and their constituent parts. Further, conventionally, the dummy had to be placed in water, but according to the present invention, the dummy is placed in a reference fixture made of silicone rubber, which has almost the same acoustic impedance as water. Therefore,
It is easy to handle as there is no need to use water. Furthermore, the ultrasonic probe will not be damaged due to water entering the probe.
第１図は従来の超音波診断装置の分解能、感度
等の検査を行なう場合のフアントムの概略構成
図、第２図は本発明によるフアントムの一実施例
である概略構成図である。
１…アクリル製容器、２…ナイロン、スチール
製ターゲツト糸、３…超音波プローブ、４…シリ
コンゴム基準固定台、５，７，８…棒状シリコン
ゴム、６…円筒状シリコンゴム、Ａ…距離分解能
測定距離、Ｂ…方位分解能測定距離、Ｃ…感度測
定方向、Ｄ，Ｅ，Ｆ…検査設定部分。
FIG. 1 is a schematic diagram of a phantom for testing the resolution, sensitivity, etc. of a conventional ultrasonic diagnostic apparatus, and FIG. 2 is a schematic diagram of an embodiment of a phantom according to the present invention. 1... Acrylic container, 2... Nylon, steel target thread, 3... Ultrasonic probe, 4... Silicon rubber reference fixing stand, 5, 7, 8... Rod-shaped silicon rubber, 6... Cylindrical silicon rubber, A... Distance resolution Measurement distance, B... Orientation resolution measurement distance, C... Sensitivity measurement direction, D, E, F... Inspection setting part.
Claims (1)
リコンゴムから成る基準固定台と、この基準固定
台内に、この基準固定台とは音響インピーダンス
の異なるシリコンゴムから成るダミーとを具備し
たことを特徴とする超音波診断装置性能試験用フ
アントム。1. A reference fixing table made of silicone rubber having almost the same acoustic impedance as water, and a dummy made of silicone rubber having a different acoustic impedance from that of the reference fixing table is provided in the reference fixing table. Phantom for performance testing of ultrasound diagnostic equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14725878A JPS5573250A (en) | 1978-11-30 | 1978-11-30 | Fantom for ultrasoniccwave diagnosis device performance test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14725878A JPS5573250A (en) | 1978-11-30 | 1978-11-30 | Fantom for ultrasoniccwave diagnosis device performance test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573250A JPS5573250A (en) | 1980-06-02 |
| JPS6155380B2 true JPS6155380B2 (en) | 1986-11-27 |
Family
ID=15426155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14725878A Granted JPS5573250A (en) | 1978-11-30 | 1978-11-30 | Fantom for ultrasoniccwave diagnosis device performance test |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573250A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61134960A (en) * | 1984-12-06 | 1986-06-23 | Matsushita Electric Ind Co Ltd | Cassette cover opening/closing device |
| JP2006166956A (en) * | 2004-12-13 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Phantom for ultrasonic diagnostic equipment |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186894A (en) * | 1984-03-07 | 1985-09-24 | 東芝シリコ−ン株式会社 | Non-reflection underwater sound absorbing material |
| JPS6289765A (en) * | 1985-10-16 | 1987-04-24 | Shin Etsu Chem Co Ltd | Silicone rubber composition for use in acoustic medium |
| JP3780253B2 (en) | 2002-10-01 | 2006-05-31 | オリンパス株式会社 | Ultrasonic phantom |
| JP5751769B2 (en) | 2010-07-27 | 2015-07-22 | キヤノン株式会社 | Image information acquisition apparatus and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636638B2 (en) * | 1972-12-29 | 1981-08-25 | ||
| JPS5319869B2 (en) * | 1974-10-31 | 1978-06-23 |
-
1978
- 1978-11-30 JP JP14725878A patent/JPS5573250A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61134960A (en) * | 1984-12-06 | 1986-06-23 | Matsushita Electric Ind Co Ltd | Cassette cover opening/closing device |
| JP2006166956A (en) * | 2004-12-13 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Phantom for ultrasonic diagnostic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5573250A (en) | 1980-06-02 |
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