JPH023607B2 - - Google Patents
Info
- Publication number
- JPH023607B2 JPH023607B2 JP55144440A JP14444080A JPH023607B2 JP H023607 B2 JPH023607 B2 JP H023607B2 JP 55144440 A JP55144440 A JP 55144440A JP 14444080 A JP14444080 A JP 14444080A JP H023607 B2 JPH023607 B2 JP H023607B2
- Authority
- JP
- Japan
- Prior art keywords
- flexible
- ultrasonic
- tip
- tube
- flexible tube
- 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
- 238000003491 array Methods 0.000 claims description 24
- 238000003745 diagnosis Methods 0.000 description 14
- 238000002604 ultrasonography Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000002405 diagnostic procedure Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 210000003238 esophagus Anatomy 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000000496 pancreas Anatomy 0.000 description 1
- 210000002307 prostate Anatomy 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Description
【発明の詳細な説明】
本発明は、プローブに超音波振動子アレーを２
つ装着し、体腔内の諸器管の像を超音波振動子ア
レーを電子的に走査して造影するセクタ走査型体
腔内超音波診断装置に関するものである。従来の
超音波診断装置は、体外からの診断では、例えば
体表面から超音波パルスを体内に発射し、生体内
の諸器管からの反射波を受信し、生体内の音響的
な診断の要に供する診断法に使用されていた。近
年このような超音波診断装置は医学分野において
臨床診断装置として普及しつつある。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a probe with two ultrasonic transducer arrays.
The present invention relates to a sector-scanning intra-body cavity ultrasonic diagnostic apparatus that is attached to a body cavity and contrasts images of various organs within a body cavity by electronically scanning an ultrasonic transducer array. For diagnosis from outside the body, conventional ultrasonic diagnostic equipment emits ultrasonic pulses into the body from the body surface, receives reflected waves from various organs in the body, and detects the acoustic diagnostic requirements inside the body. It was used in diagnostic methods for In recent years, such ultrasonic diagnostic devices have become popular as clinical diagnostic devices in the medical field.
一方、プローブや内視鏡の先端部に超音波振動
子を装着し機械的にセクタ走査したり、超音波振
動子アレーを装着しこれを電子的方法によりリニ
アあるいはセクタ走査して超音波断層像を得て診
断の要に供する体内からの診断法も知られてい
る。 On the other hand, an ultrasonic transducer is attached to the tip of a probe or endoscope to perform mechanical sector scanning, or an ultrasonic transducer array is attached to the tip of an endoscope and it is scanned electronically in a linear or sectoral manner to produce ultrasonic tomographic images. A diagnostic method from within the body is also known in which the obtained blood is used for diagnosis.
しかしながら従来の超音波診断装置のうち、体
外からの診断では超音波の減衰が大きく、低い周
波数の超音波を使うため画質が悪く、また骨、気
体等の障害物の影響を受けやすい欠点があり、近
年高い周波数の超音波を使い良質の画像を得られ
る体内からの診断方法が注目されている。 However, conventional ultrasonic diagnostic equipment has the drawbacks that when diagnosing from outside the body, the attenuation of ultrasonic waves is large, the image quality is poor due to the use of low frequency ultrasonic waves, and it is easily affected by obstacles such as bones and gas. In recent years, diagnostic methods from inside the body that use high-frequency ultrasound to obtain high-quality images have been attracting attention.
しかし体外からの診断を行う電子セクタ走査型
の超音波診断装置等では、プローブの向きを変え
ることにより任意の方向の断層像をとり得るのに
対し、従来の体内からの超音波診断装置は、超音
波振動子または超音波振動子アレーは一つしか付
いていないので水平方向あるいは垂直方向等振動
子の取付け方向によつて定まる一方向の断面像し
か走査できず、充分な診断が行えない欠点があつ
た。 However, with electronic sector scanning type ultrasound diagnostic equipment that performs diagnosis from outside the body, it is possible to take tomographic images in any direction by changing the direction of the probe, whereas conventional ultrasound diagnostic equipment from inside the body can take Since only one ultrasonic transducer or ultrasonic transducer array is attached, cross-sectional images can only be scanned in one direction determined by the mounting direction of the transducer, such as horizontal or vertical, which makes it difficult to perform a thorough diagnosis. It was hot.
本発明の目的は、上述した欠点を除去し、互い
に異なつた方向の断層像が得られるよう適切に構
成した超音波内視診断装置を提供することにあ
る。 SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide an ultrasonic endoscopic diagnostic apparatus suitably configured to obtain tomographic images in different directions.
本発明は、可撓管と、走査断面方向が互いに交
差して異なる２つの振動子アレーとを有し、この
２つの振動子アレーをともに可撓管先端部近傍の
側面に設けたことを特徴とするものである。 The present invention is characterized in that it has a flexible tube and two transducer arrays whose scanning cross-sectional directions cross each other and are different, and both of these two transducer arrays are provided on the side surface near the tip of the flexible tube. That is.
以下図面を参照して本発明を詳細に説明する。 The present invention will be described in detail below with reference to the drawings.
第１図は本発明による超音波内視診断装置の可
撓管先端部の一例の構成を示す斜視図である。 FIG. 1 is a perspective view showing an example of the configuration of a flexible tube tip of an ultrasonic endoscopic diagnostic apparatus according to the present invention.
両矢印Ａで示される走査断面方向を走査するセ
クタ走査用振動子アレー１を可撓管２の一方の側
面に配置する。このセクタ走査用振動子アレー１
の下側に、両矢印Ｂで示される走査断面方向を走
査するセクタ走査用振動子アレー３を可撓管２の
側面に配置する。 A sector scanning transducer array 1 that scans in a scanning cross-sectional direction indicated by a double arrow A is arranged on one side of a flexible tube 2. This sector scanning transducer array 1
A sector scanning transducer array 3 that scans in the scanning cross-sectional direction indicated by the double arrow B is arranged on the side surface of the flexible tube 2 below.
第２図は第１図に示す先端部分を線−に沿
つて切つた断面図である。 FIG. 2 is a cross-sectional view of the tip portion shown in FIG. 1 taken along line -.
セクタ走査用振動子アレー１と３はそれぞれダ
ンパー４と５で支持してあり、可撓管２とは直接
接触してないので有効に超音波を発信することが
できる。 The sector scanning transducer arrays 1 and 3 are supported by dampers 4 and 5, respectively, and are not in direct contact with the flexible tube 2, so that they can effectively transmit ultrasonic waves.
このような構成の超音波診断装置では互いに走
査断面方向が交差して異なるので、２方向の断層
像が得られ充分な診断が行える。 In the ultrasonic diagnostic apparatus having such a configuration, the scanning cross-sectional directions cross each other and differ, so that tomographic images in two directions can be obtained and sufficient diagnosis can be performed.
第３図は本発明による超音波内視診断装置の一
使用例の構成を説明するための線図である。 FIG. 3 is a diagram for explaining the configuration of an example of use of the ultrasonic endoscopic diagnostic apparatus according to the present invention.
セクタ走査用振動子アレー１，３を先端部に配
置した可撓管２を被検者の食道内に挿入し、体内
より心臓の超音波診断を行う。セクタ走査用振動
子アレー１，３からの信号線はケーブル群６を介
し表示装置７に接続する。このような構成の超音
波診断装置の動昨は、セクタ走査用振動子アレー
１および３を電気的に切替えて必要とする断層方
向の像を表示装置７に表示するか、あるいは一フ
レーム走査ごとに交互に切替えて断層方向の異な
る２画面を同時に表示装置７に表示することがで
きる。 A flexible tube 2 having sector scanning transducer arrays 1 and 3 disposed at its tip is inserted into the esophagus of a subject, and ultrasound diagnosis of the heart is performed from inside the body. Signal lines from the sector scanning transducer arrays 1 and 3 are connected to a display device 7 via a cable group 6. The operation of the ultrasonic diagnostic apparatus having such a configuration is to display an image in the required tomographic direction on the display device 7 by electrically switching the sector scanning transducer arrays 1 and 3, or to display the image in the required tomographic direction for each frame scan. By switching alternately, two screens with different tomographic directions can be displayed on the display device 7 at the same time.
第４図は本発明による超音波内視診断装置の可
撓管先端部の他の例の構成を示す斜視図である。 FIG. 4 is a perspective view showing the structure of another example of the flexible tube tip of the ultrasonic endodiagnostic apparatus according to the present invention.
セクタ走査用振動子アレー１と３を互いに異な
る走査断面方向に向けて可撓管２の先端部の各々
反対側の側面に配置する。このような構成の超音
波診断装置の動作は、セクタ走査用振動子アレー
１は両矢印Ａで示す走査断面方向を持ち、セクタ
走査用振動子アレー３は両矢印Ｂで示す走査断面
方向を持つので、可撓管２を被検者の体内に挿入
し所望の断層方向の超音波像を観察し、可撓管２
を180゜回転させ、振動子アレーを切替えて表示装
置７で異なる方向の超音波断層像を観察する。 The sector scanning transducer arrays 1 and 3 are arranged on opposite sides of the tip of the flexible tube 2, facing different scanning cross-sectional directions. The operation of the ultrasonic diagnostic apparatus having such a configuration is such that the sector scanning transducer array 1 has a scanning cross-sectional direction indicated by a double arrow A, and the sector scanning transducer array 3 has a scanning cross-sectional direction indicated by a double arrow B. Therefore, insert the flexible tube 2 into the subject's body, observe the ultrasound image in the desired cross-sectional direction, and insert the flexible tube 2 into the subject's body.
is rotated 180 degrees, the transducer array is switched, and ultrasonic tomographic images in different directions are observed on the display device 7.
第５図は本発明による超音波内視診断装置の可
撓管先端部のさらに他の例の構成を示す斜視図で
ある。本例では２つのセクタ走査用振動子アレー
１および３（図示せず）を、互いに異なる走査断
面方向に向くように、被検者の内臓器管に損傷を
与えないような形状の可撓性内管８の先端部に配
置する。可撓性内管８の中に２つの振動子アレー
１，３からの信号ケーブル群（図示せず）を通し
外部へ導出する。この可撓性内管８は可撓性外管
９の内部に回動自在に挿通し外部まで導出する。
また２つの振動子アレー１および３の走査断面方
向は夫々両矢印Ａ，Ｂで示すように直交してい
る。このような超音波診断装置を被検者の体内に
挿入した後、異なる方向の断層像を得る場合に
は、可撓性内管８を外部から回転させれば可撓性
外管９を回転することなく振動子アレー１，３の
いずれかを目的とする診断対象臓器の方向へ向け
られるので前記第３図に示した実施例の操作がよ
り容易となると共に被検者の苦痛も少なくなる。 FIG. 5 is a perspective view showing the configuration of still another example of the flexible tube distal end portion of the ultrasonic endoscopic diagnostic apparatus according to the present invention. In this example, two sector scanning transducer arrays 1 and 3 (not shown) are arranged in flexible shapes that do not damage the internal organs of the subject so that they are oriented in different scanning cross-sectional directions. It is placed at the tip of the inner tube 8. A group of signal cables (not shown) from the two transducer arrays 1 and 3 are passed through the flexible inner tube 8 and guided to the outside. The flexible inner tube 8 is rotatably inserted into the flexible outer tube 9 and led out to the outside.
Further, the scanning cross-sectional directions of the two transducer arrays 1 and 3 are perpendicular to each other as shown by double arrows A and B, respectively. After inserting such an ultrasonic diagnostic device into the body of a subject, to obtain a tomographic image in a different direction, the flexible inner tube 8 can be rotated from the outside to rotate the flexible outer tube 9. Since the transducer arrays 1 and 3 can be directed toward the organ to be diagnosed without having to do so, the operation of the embodiment shown in FIG. 3 is easier, and the patient suffers less pain. .
第６図は、本発明による超音波内視診断装置を
内視鏡に組んだ一例の構成を示す線図である。 FIG. 6 is a diagram showing the configuration of an example in which the ultrasonic endoscopic diagnostic apparatus according to the present invention is assembled into an endoscope.
内視鏡１０の可撓管２の先端部１１に振動子ア
レー１，３を第１図の実施例で示すように走査断
面方向が互いに交差して異なる方向を向くように
配置する。この振動子アレー１，３から信号線を
可撓管２内を通しケーブル群６を介し表示装置７
に接続する。可撓管先端部１１には図示しない観
察系および照明用光学系を備える。このような超
音波診断装置の動作は、振動子アレー１，３で観
察対象をセクタ走査し、振動子アレー１，３に得
られる信号をケーブル群６を介して表示装置７で
表示する。表示装置７では振動子アレー１と３を
切替えて、いずれかの断層方向の映像を選択して
表示するか、または両方の断層方向の映像を表示
する。 As shown in the embodiment of FIG. 1, the transducer arrays 1 and 3 are arranged at the distal end 11 of the flexible tube 2 of the endoscope 10 so that their scanning cross-sectional directions cross each other and face different directions. Signal lines are passed from the transducer arrays 1 and 3 through the flexible tube 2 to the display device 7 via the cable group 6.
Connect to. The flexible tube tip 11 is equipped with an observation system and an illumination optical system (not shown). The operation of the ultrasonic diagnostic apparatus is such that the transducer arrays 1 and 3 scan sectors of the observation target, and the signals obtained from the transducer arrays 1 and 3 are displayed on the display device 7 via the cable group 6. The display device 7 switches between the transducer arrays 1 and 3 to select and display an image in one of the tomographic directions, or to display images in both tomographic directions.
一方、観察者は内視鏡の観察系および照明用光
学系で観察対象の光学像を得られるので、上記超
音波診断像と合わせてより有効な医学的診断が行
い得る。本実施例の内視鏡は直視型を用いたが側
視型でもよい。 On the other hand, since the observer can obtain an optical image of the object to be observed using the observation system and illumination optical system of the endoscope, more effective medical diagnosis can be made in conjunction with the ultrasound diagnostic image. Although a direct viewing type endoscope was used in this embodiment, a side viewing type may also be used.
尚、以上に示した実施例は食道内から心臓の超
音波診断の目的に供されるのに限らず、直腸内か
らの前立腺診断等他の部位の体腔内診断に使用す
ることができる。 Note that the embodiments described above are not limited to being used for the purpose of ultrasonic diagnosis of the heart from within the esophagus, but can also be used for intra-body diagnosis of other parts of the body, such as prostate diagnosis from within the rectum.
以上の説明から明らかなように、本発明によれ
ば、内視鏡の先端の側面に走査断面方向が互いに
交差して異なる２つの振動子アレーを設け、胃
壁、膵臓等の断層像を表示できるので、例えば水
平垂直の２方向の断層像により、より多くの診断
情報を得ることができる。 As is clear from the above description, according to the present invention, two transducer arrays with different scanning cross-sectional directions are provided on the side surface of the tip of the endoscope, so that tomographic images of the stomach wall, pancreas, etc. can be displayed. Therefore, more diagnostic information can be obtained by, for example, tomographic images in two directions, horizontal and vertical.
このように、走査断面方向が互いに異なる２つ
の振動子アレーが可撓管の先端部近傍の側面に設
けられているので、可撓管を被検体に挿入して診
断を行う際に、被検体外にある可撓管の端部を可
撓管の中心軸を中心に回転させて、その先端部を
中心軸を中心に回転させることにより、又は、可
撓管の端部を挿入方向に対して前進、後退させ
て、その先端部を前進、後退させることにより、
被検体（例えば、体腔内の消化管等）の内側より
可撓管先端部の周域の異なる部位について、それ
ぞれの部位で２種類の断層像を得ることができ、
高精度かつ正確な診断が可能となる。更に体内よ
り超音波診断を行うので体外からの診断に比べ筋
肉層等による減衰を受けにくく、より高い周波数
を使用することが可能となる。その結果例えば
5MHz位の周波数を使うことにより超音波ビーム
の指向特性等を損うことなく振動子アレーの形状
を一辺10mm以下にすることが可能となり、超音波
診断装置の可撓管の径を、被検者に大きな苦痛を
与えない程度にできる利点がある。 In this way, the two transducer arrays with different scanning cross-sectional directions are provided on the side surface near the tip of the flexible tube, so when the flexible tube is inserted into the subject for diagnosis, it is possible to By rotating the outer end of the flexible tube around the central axis of the flexible tube and rotating its tip around the central axis, or by rotating the end of the flexible tube with respect to the insertion direction. By moving the tip forward and backward,
It is possible to obtain two types of tomographic images for different areas around the tip of the flexible tube from inside the subject (for example, the digestive tract in a body cavity), and
Highly accurate and accurate diagnosis becomes possible. Furthermore, since ultrasonic diagnosis is performed from inside the body, it is less susceptible to attenuation by muscle layers and the like compared to diagnosis from outside the body, and higher frequencies can be used. As a result, for example
By using a frequency of about 5 MHz, it is possible to reduce the shape of the transducer array to less than 10 mm on each side without impairing the directivity characteristics of the ultrasound beam. It has the advantage of being able to do so without causing great pain to people.
第１図は本発明による超音波内視診断装置の可
撓管先端部の一例の構成を示す斜視図、第２図は
第１図に示す先端部分を線−に沿つて切つた
断面図、第３図は、本発明による超音波内視診断
装置の一使用例の構成を説明するための線図、第
４図は本発明による超音波内視診断装置の可撓管
先端部の他の例の構成を示す斜視図、第５図は、
本発明による超音波内視診断装置の可撓管先端部
のさらに他の例の構成を示す斜視図、第６図は本
発明による超音波内視診断装置を内視鏡に組んだ
一例の構成を示す線図である。
１，３……セクタ走査用振動子アレー、２……
可撓管、４，５……ダンパー、６……ケーブル
群、７……表示装置、８……可撓性内管、９……
可撓性外管、１０……内視鏡、１１……可撓管先
端部。
FIG. 1 is a perspective view showing the configuration of an example of the flexible tube tip of the ultrasonic endodiagnostic device according to the present invention, and FIG. 2 is a cross-sectional view of the tip shown in FIG. 1 taken along the line -. FIG. 3 is a diagram for explaining the configuration of an example of use of the ultrasonic endodiagnostic device according to the present invention, and FIG. 4 is a diagram showing another example of the flexible tube tip of the ultrasonic endodiagnostic device according to the present invention. A perspective view showing the configuration of an example, FIG.
FIG. 6 is a perspective view showing the configuration of still another example of the flexible tube tip of the ultrasonic endodiagnostic device according to the present invention, and FIG. 6 is a configuration of an example in which the ultrasonic endodiagnostic device according to the present invention is assembled into an endoscope. FIG. 1, 3... Sector scanning transducer array, 2...
Flexible tube, 4, 5... Damper, 6... Cable group, 7... Display device, 8... Flexible inner tube, 9...
Flexible outer tube, 10... Endoscope, 11... Flexible tube tip.
Claims (1)
なる２つの振動子アレーとを有し、この２つの振
動子アレーをともに可撓管先端部近傍の側面に設
けたことを特徴とする超音波内視診断装置。 ２ 上記２つの振動アレーを可撓管先端部近傍の
互いに反対側となる側面に設けたことを特徴とす
る特許請求の範囲第１項記載の超音波内視診断装
置。 ３ 可撓性外管と、この可撓性外管内に挿設され
た可撓性内管とからなる上記可撓管と、上記可撓
性内管の先端部近傍の側面に設けられた上記２つ
の振動子アレーとからなり、上記可撓性内管の少
なくとも上記２つの振動子アレーが設けられた先
端部を上記可撓性外管に対して回動自在としたこ
とを特徴とする特許請求の範囲第１項記載の超音
波内視診断装置。[Claims] 1. A flexible tube and two transducer arrays whose scanning cross-sectional directions cross each other and are different, and both of the two transducer arrays are provided on a side surface near the tip of the flexible tube. An ultrasonic endoscopic diagnostic device characterized by: 2. The ultrasonic endoscopic diagnostic apparatus according to claim 1, wherein the two vibrating arrays are provided on mutually opposite sides near the tip of the flexible tube. 3. The above-mentioned flexible tube consisting of a flexible outer tube and a flexible inner tube inserted into the flexible outer tube, and the above-mentioned flexible tube provided on the side surface near the tip of the flexible inner tube. a patent comprising two vibrator arrays, wherein a tip end portion of the flexible inner tube on which at least the two vibrator arrays are provided is rotatable with respect to the flexible outer tube. An ultrasonic endoscopic diagnostic apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55144440A JPS5769847A (en) | 1980-10-17 | 1980-10-17 | Ultrasonic diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55144440A JPS5769847A (en) | 1980-10-17 | 1980-10-17 | Ultrasonic diagnostic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769847A JPS5769847A (en) | 1982-04-28 |
| JPH023607B2 true JPH023607B2 (en) | 1990-01-24 |
Family
ID=15362258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55144440A Granted JPS5769847A (en) | 1980-10-17 | 1980-10-17 | Ultrasonic diagnostic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769847A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0744125U (en) * | 1990-12-18 | 1995-10-31 | パテント−トロイハント−ゲゼルシヤフト フユア エレクトリツシエ グリユーランペン ミツト ベシユレンクテル ハフツング | Reflective lamp |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587230A (en) * | 1981-07-06 | 1983-01-17 | アロカ株式会社 | Ultrasonic probe for endoscope |
| JPS5988137A (en) * | 1982-11-15 | 1984-05-22 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
| JPS59182310U (en) * | 1983-05-19 | 1984-12-05 | 横河メディカルシステム株式会社 | Intrabody cavity inspection probe |
| JPS61244335A (en) * | 1985-04-23 | 1986-10-30 | 株式会社島津製作所 | Probe through rectum |
| JPS62189053A (en) * | 1986-02-17 | 1987-08-18 | 株式会社 日立メデイコ | Ultrasonic diagnostic apparatus |
| JPS63201515U (en) * | 1987-06-19 | 1988-12-26 | ||
| AU1983397A (en) * | 1996-02-29 | 1997-09-16 | Acuson Corporation | Multiple ultrasound image registration system, method and transducer |
| US8641627B2 (en) * | 2003-11-26 | 2014-02-04 | Imacor Inc. | Transesophageal ultrasound using a narrow probe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573628A (en) * | 1980-06-11 | 1982-01-09 | Aloka Co Ltd | Ultrasonic diagnosis apparatus for endoscope |
-
1980
- 1980-10-17 JP JP55144440A patent/JPS5769847A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573628A (en) * | 1980-06-11 | 1982-01-09 | Aloka Co Ltd | Ultrasonic diagnosis apparatus for endoscope |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0744125U (en) * | 1990-12-18 | 1995-10-31 | パテント−トロイハント−ゲゼルシヤフト フユア エレクトリツシエ グリユーランペン ミツト ベシユレンクテル ハフツング | Reflective lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5769847A (en) | 1982-04-28 |
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