JPS6395038A - Ultrasonic probe - Google Patents
Ultrasonic probeInfo
- Publication number
- JPS6395038A JPS6395038A JP61239026A JP23902686A JPS6395038A JP S6395038 A JPS6395038 A JP S6395038A JP 61239026 A JP61239026 A JP 61239026A JP 23902686 A JP23902686 A JP 23902686A JP S6395038 A JPS6395038 A JP S6395038A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- concave surface
- ultrasonic probe
- curvature
- sequentially
- 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
- 239000000523 sample Substances 0.000 title claims description 24
- 238000002604 ultrasonography Methods 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 5
- 238000002592 echocardiography Methods 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 206010002329 Aneurysm Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 208000015121 Cardiac valve disease Diseases 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、超音波を利用し体腔内壁面や金属管の内面の
内視鏡的なｆｊＡ察を行なう診断装置、もしくは金属探
傷装置に関し、とくにその超音波探触子に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diagnostic device or a metal flaw detection device that performs endoscopic fjA inspection of the inner wall surface of a body cavity or the inner surface of a metal tube using ultrasonic waves. In particular, it concerns the ultrasonic probe.
従来の内視鏡を大別すると、光学的にＩ＋！察を行なう
光学内視鏡と、超音波を利用する超音波内視鏡がある。If you roughly categorize conventional endoscopes, they are optically I+! There are two types of endoscopes: optical endoscopes that use ultrasound and ultrasound endoscopes that use ultrasound.
前者は体腔内の表面のＲ察に適するが、不透明な液体の
充満する管、たとえば動脈などのａｍに際しては、生理
食塩水を注入するなど上記液体（血液）が観察の支障に
ならない様にする必要がある。一方超音波内視鏡では、
例えば特開昭５６−１５６１４２などに示されるように
、パル入反射法により断層像の像再生を行なっており、
光学的に不透明な液体などが介在していても内部断装置
を観測することができる。The former is suitable for R observation of the surface inside the body cavity, but for am of a tube filled with opaque liquid, such as an artery, it is necessary to inject physiological saline to prevent the liquid (blood) from interfering with observation. There is a need. On the other hand, with ultrasound endoscopy,
For example, as shown in Japanese Patent Application Laid-Open No. 56-156142, image reconstruction of tomographic images is performed using the pulse input reflection method.
The internal cutting device can be observed even if optically opaque liquid or the like is present.
表示するものであるので体腔内壁の更に内部を観察する
には適しているが、内壁表面の様子をｆ！Ａ察するには
適さない。例えば、血管内から動脈瘤や弁膜障害を検査
しようとする場合、断面像よりむしろ血管内壁面の様子
をａ察した方が有効な場合がある。また内部に不透明な
液体が充満している金属パイプの検査（内壁面の酸化や
亀裂の検査）においても同様である。Since it is a display, it is suitable for observing the inside of the inner wall of a body cavity, but f! A: Not suitable for guessing. For example, when attempting to examine an aneurysm or valvular disorder from within a blood vessel, it may be more effective to observe the condition of the inner wall surface of the blood vessel rather than a cross-sectional image. The same applies to inspections of metal pipes filled with opaque liquid (inspection of oxidation and cracks on the inner wall surface).
ところが従来の超音波内視鏡は媒質（管内の液体）と対
象物の界面を撮像するのではなく対象物の断面を撮像す
る。特にその探触子は断層像（Ｂモード像）の撮像に適
した形状であり、上記の場合に有効な観察ができない。However, conventional ultrasound endoscopes do not image the interface between the medium (liquid inside the tube) and the object, but instead image a cross section of the object. In particular, the probe has a shape suitable for capturing a tomographic image (B-mode image), and cannot perform effective observation in the above case.
そこで本発明の目的は、管状の対象物の内壁面の観察に
適した超音波内視鏡の探触子を提供するにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a probe for an ultrasound endoscope suitable for observing the inner wall surface of a tubular object.
ｃ問題点を解決するための手段〕 本発明の超音波探触子は、一方向について凹面。c.Means for solving problems] The ultrasound probe of the present invention has a concave surface in one direction.
他の一方向について凸面の形状、すなわち鞍型の形状の
送受波面を有する振動子を用いる。この凹面の曲率半径
は凸面の方向にそって順次変化し、もって超音波ビーム
の焦点距離が短がい距離から長い距離へ連続的に変化す
るようにしている。A vibrator is used which has a wave transmitting/receiving surface having a convex shape in the other direction, that is, a saddle shape. The radius of curvature of this concave surface changes sequentially along the direction of the convex surface, so that the focal length of the ultrasound beam changes continuously from a short distance to a long distance.
このような超音波探触子によれば凸面の方向にそって焦
点距離が変るので、−回の送受により順次得られる反射
波の検出信号を時間により弁別して表示してライン状の
反射点からの信号を表示することができる。しかも一方
向凸面の形状により、振動子の長さに比べ広い範囲に焦
点をむすぶことができ、この振動子を検査対象の内側で
回転させることにより、検査対象の内壁面の広い範囲の
凹凸の状態を表示することができる。With such an ultrasonic probe, the focal length changes along the direction of the convex surface, so the detection signals of the reflected waves sequentially obtained by - times of transmission and reception are differentiated and displayed according to time, and are detected from the line-shaped reflection point. signals can be displayed. Moreover, due to the shape of the unidirectional convex surface, it is possible to focus on a wider range than the length of the transducer, and by rotating this transducer inside the object to be inspected, unevenness can be detected over a wide range of the inner wall surface of the object to be inspected. The status can be displayed.
第１図ば（ａ）、（ｂ）、（ｃ）は本発明の一実施例の
探触子に用いられる振動子を示す。この振動子の送受波
面は一方向について凹面の形状を有すルカその凹面の曲
率半径は第１図（ｃ）に示されるようにＲ′からＲ“へ
連続的に変化している。FIGS. 1(a), 1(b), and 1(c) show a vibrator used in a probe according to an embodiment of the present invention. The wave transmitting/receiving surface of this vibrator has a concave shape in one direction, and the radius of curvature of the concave surface changes continuously from R' to R'' as shown in FIG. 1(c).
これにより、第１図（ａ）、もしくは（ｂ）に示すよう
に超音波ビームの焦点距離ＦはＦ′からＦ”へ連続的に
変化している。さらに振動子の送受波面は第１図（ｂ）
に示されるように他の一方向について凸面に形成されて
おり、もって第１図（ａ）に示すように全体として鞍型
に形成されている。As a result, the focal length F of the ultrasonic beam changes continuously from F' to F'' as shown in FIG. (b)
As shown in FIG. 1, it is formed to have a convex surface in the other direction, and as a whole, it is formed into a saddle shape as shown in FIG. 1(a).
このようにすれば、超音波ビームの焦点を広い範囲で結
ぶことができる。したがって、方位方向の分解能が向上
する。In this way, the ultrasonic beam can be focused over a wide range. Therefore, the resolution in the azimuth direction is improved.
前記超音波振動子は、上記鞍型に形成された支持体の上
に、短冊状に切断した複数個の振動子を、相互に所定の
間隔を持って接着剤で連結し、短辺方向に並設して鞍型
に成することもできる。また、柱状に切断された複数個
の振動子を、相互に所定の間隔を持って、面状に有機接
着で連結した、フレキシブルな物で鞍型に形成すること
もできる。The ultrasonic transducer is constructed by connecting a plurality of transducers cut into strips with an adhesive at a predetermined distance from each other on the saddle-shaped support body in the direction of the short side. They can also be arranged side by side to form a saddle shape. Further, it is also possible to form a saddle shape using a flexible material in which a plurality of vibrators cut into columnar shapes are interconnected in a plane with organic adhesive at a predetermined distance from each other.
なお、超音波探触子は、圧電性有機高分子材料や、単結
晶ニオブ酸リチウム、チタン酸ジルコン酸鉛（ＰＺＴ）
、チタン酸鉛（ｐｂｒｉｏａ）その他の無機物で構成す
ることもできる。The ultrasonic probe is made of piezoelectric organic polymer materials, single crystal lithium niobate, lead zirconate titanate (PZT), etc.
, lead titanate (pbrioa), and other inorganic materials.
第２図は従来の、一般的な超音波内視装置（例、実開６
Ｏ−８６３１０）の構成を示す。超音波探触子１は回転
軸に取り付け、フレキシブルワイヤー２に連結されたモ
ータ３により回転駆動される。この時超音波ビームは、
回転軸と直交方向に設ける。また超音波振動子１は、！
気駆動回路４に接続され高電圧のインパルスを加えるこ
とにより超音波パルスを放射する。被検物からの反射し
た一部のエコーは受信回路５にて像再生されたモニター
６に表示される。像再生の方法は、超音波を送信し以後
乱反射したエコーを順次受信し、一方のラスター上に音
の強さを輝度変換し、伝播時間を距離に置き換えて表示
する。このラスターは回転と同期をとって円周上に表示
をする。Figure 2 shows a conventional, general ultrasonic endoscopic device (e.g., practical 6
0-86310) is shown. The ultrasonic probe 1 is attached to a rotating shaft and is rotationally driven by a motor 3 connected to a flexible wire 2. At this time, the ultrasound beam is
Installed in a direction perpendicular to the rotation axis. Moreover, the ultrasonic transducer 1 is!
It is connected to the air drive circuit 4 and emits ultrasonic pulses by applying high voltage impulses. A portion of the echo reflected from the object to be inspected is reproduced as an image by the receiving circuit 5 and displayed on the monitor 6. The image reconstruction method is to transmit ultrasonic waves, then sequentially receive the diffusely reflected echoes, convert the intensity of the sound to brightness, and display the propagation time in terms of distance on one raster. This raster is displayed on the circumference in synchronization with rotation.
次に第３図では１本発明による探触子を利用した超音波
内視装置を示す。超音波探触子ｌは回転軸に傾斜させて
取り付け、フレキシブルワイヤー２に連結されたモータ
３により回転駆動される。Next, FIG. 3 shows an ultrasonic endoscopic device using a probe according to the present invention. The ultrasonic probe 1 is mounted obliquely on a rotating shaft, and is rotationally driven by a motor 3 connected to a flexible wire 2.
この時超音波ビームは１回転軸方向に焦点深度を変化さ
せ被検物表面に焦点を設ける。超音波探触子１は、電気
駆動回路４に接続され高電圧のインパルスを加えること
により超音波パルスを放射する。被検物表面凹凸からの
乱反射した一部のエコーは受信回路５にて像再生されモ
ニター６に表示される。像再生の方法は、超音波を送信
し以後乱反射したエコーを順次受信し、一方のラスター
上に音の強さを輝度変換し、伝播時間を距離に置き換え
て表示する。このラスターは回転と同期をとって円周上
に表示をする。At this time, the depth of focus of the ultrasonic beam is changed in the direction of one rotational axis, and the focus is set on the surface of the object. The ultrasonic probe 1 is connected to an electric drive circuit 4 and emits ultrasonic pulses by applying high voltage impulses. Some of the echoes diffusely reflected from the irregularities on the surface of the object are reproduced as images in the receiving circuit 5 and displayed on the monitor 6. The image reconstruction method is to transmit ultrasonic waves, then sequentially receive the diffusely reflected echoes, convert the intensity of the sound to brightness, and display the propagation time in terms of distance on one raster. This raster is displayed on the circumference in synchronization with rotation.
第４図は本発明による超音波探触子を内、視鏡に取り付
け、パイプ８の内側より観察したときの斜視図である。FIG. 4 is a perspective view when the ultrasonic probe according to the present invention is attached to an endoscope and observed from inside the pipe 8.
超音波探触子１は、超音波ビーム７がパイプ８に斜めに
入射するように取り付けられ、超音波パルスはパイプの
表面で、一度に深度の異なる広い範囲で焦点を結ぶよう
に送信し、連続的な超音波ビームを設ける。したがって
、パイプ表面の広い範囲で、方位分解能の向上が計られ
る。The ultrasonic probe 1 is attached so that the ultrasonic beam 7 is obliquely incident on the pipe 8, and the ultrasonic pulse is transmitted so as to be focused on a wide range of different depths at once on the surface of the pipe, A continuous ultrasound beam is provided. Therefore, the azimuth resolution can be improved over a wide range of the pipe surface.
パイプ表面には酸化や亀裂による凹凸があり、この凹凸
により超音波パルスの乱反射が起こる。乱反射した一部
のエコーが受信回路にて像再生されモニターに表示され
る。また、血管内からの動脈瘤や心臓の弁膜障害などの
Ｗｔ察も同様に行なえる。The pipe surface has irregularities due to oxidation and cracks, and these irregularities cause diffuse reflection of ultrasonic pulses. Some of the diffusely reflected echoes are reproduced as images in the receiving circuit and displayed on the monitor. In addition, Wt detection such as aneurysms and heart valve disorders can be similarly performed from within blood vessels.
本発明における超音波探触子を利用すれば、超音波探触
子の操作が簡単になり、光学内視鏡が利用出来ない場所
に於いて内壁表面の［Ｊが可能となる。また、撮像速度
の向上も計れる。If the ultrasonic probe of the present invention is used, the operation of the ultrasonic probe becomes easy, and [J of the inner wall surface] becomes possible in places where an optical endoscope cannot be used. Furthermore, it is possible to improve the imaging speed.
第１図は本発明による探触子の構造である。第２図は従
来の超音波内視装置の概略図。第３図は本発明による超
音波探触子を利用した超音波内視装置の概略図。第４図
はパイプに本発明による超音波探触子を挿入したときの
斜視図と表示例である。FIG. 1 shows the structure of a probe according to the present invention. FIG. 2 is a schematic diagram of a conventional ultrasound endoscopic device. FIG. 3 is a schematic diagram of an ultrasound endoscopic device using an ultrasound probe according to the present invention. FIG. 4 is a perspective view and a display example when the ultrasonic probe according to the present invention is inserted into a pipe.
Claims (1)
検物の表面像を得るようにした超音波撮像装置において
、超音波振動子を一方向に湾曲凹面状とし、凹面の曲率
をこれと直交する方向にそって順次変化させて超音波ビ
ームの焦点深度を順次深くするとともに、この凹面と直
交する方向に湾曲凸面状として全体を鞍型に形成してな
ることを特徴とする超音波探触子。 ２、短冊状に切断した複数の超音波振動子を、相互に接
着剤で連結して凹面の曲率を変化させ一方向に順次配設
し、超音波ビームの焦点深度を順次深くするとともに、
この配列方向にそって湾曲凸面状として全体を鞍型に形
成した支持体上に配設してなる特許請求の範囲第１項記
載の超音波探触子。 ３、柱状に切断した複数の超音波振動子を、相互に接着
剤で連結して凹面の曲率を変化させ一方向に順次配列し
、超音波ビームの焦点深度を順次深くするとともに、こ
の配列方向に湾曲凹面状として全体を鞍型に形成してな
る特許請求の範囲第１項記載の超音波探触子。[Claims] 1. In an ultrasonic imaging device that sequentially transmits and receives ultrasonic pulses from an ultrasonic transducer to obtain a surface image of a specimen, the ultrasonic transducer has a concave shape curved in one direction. , the curvature of the concave surface is sequentially changed along the direction orthogonal to the concave surface to gradually deepen the focal depth of the ultrasound beam, and the entire surface is formed into a saddle shape with a curved convex surface in the direction orthogonal to the concave surface. An ultrasonic probe featuring: 2. A plurality of ultrasonic transducers cut into strips are connected to each other with adhesive to change the curvature of the concave surface and sequentially arranged in one direction to gradually increase the focal depth of the ultrasonic beam,
The ultrasonic probe according to claim 1, wherein the ultrasonic probe is disposed on a support body having a saddle shape with a curved convex surface along the arrangement direction. 3. A plurality of ultrasonic transducers cut into columnar shapes are connected to each other with adhesive to change the curvature of the concave surface and are arranged sequentially in one direction.The focal depth of the ultrasonic beam is gradually deepened, and the curvature of the concave surface is changed. The ultrasonic probe according to claim 1, wherein the ultrasonic probe is formed into a saddle shape with a curved concave surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239026A JPH0779817B2 (en) | 1986-10-09 | 1986-10-09 | Ultrasonic imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239026A JPH0779817B2 (en) | 1986-10-09 | 1986-10-09 | Ultrasonic imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6395038A true JPS6395038A (en) | 1988-04-26 |
| JPH0779817B2 JPH0779817B2 (en) | 1995-08-30 |
Family
ID=17038778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61239026A Expired - Lifetime JPH0779817B2 (en) | 1986-10-09 | 1986-10-09 | Ultrasonic imaging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0779817B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020148603A (en) * | 2019-03-13 | 2020-09-17 | 株式会社ニチゾウテック | Ultrasonic probe, anchor bolt ultrasonic flaw detection inspection device, and anchor bolt ultrasonic flaw detection inspection method |
-
1986
- 1986-10-09 JP JP61239026A patent/JPH0779817B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020148603A (en) * | 2019-03-13 | 2020-09-17 | 株式会社ニチゾウテック | Ultrasonic probe, anchor bolt ultrasonic flaw detection inspection device, and anchor bolt ultrasonic flaw detection inspection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0779817B2 (en) | 1995-08-30 |
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