JPH0692888B2 - X-ray CT system - Google Patents
X-ray CT systemInfo
- Publication number
- JPH0692888B2 JPH0692888B2 JP2004258A JP425890A JPH0692888B2 JP H0692888 B2 JPH0692888 B2 JP H0692888B2 JP 2004258 A JP2004258 A JP 2004258A JP 425890 A JP425890 A JP 425890A JP H0692888 B2 JPH0692888 B2 JP H0692888B2
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- Japan
- Prior art keywords
- ray
- inspection object
- rotation axis
- angle
- inspected
- Prior art date
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- Expired - Lifetime
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- Analysing Materials By The Use Of Radiation (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は産業用のＸ線CT装置、特に微細構造物の内部を
非破壊で検査するのに好適なＸ線CT装置に関するもので
ある。TECHNICAL FIELD The present invention relates to an industrial X-ray CT apparatus, and more particularly to an X-ray CT apparatus suitable for nondestructively inspecting the inside of a microstructure.
Ｘ線CT装置は外部から人体の内部を観察することができ
るという優れた特徴故に、医療の分野において広く使用
されている。また、各種工業製品の内部を非破壊で検査
することができるので、近年産業の分野においても徐々
に普及しつつある。The X-ray CT apparatus is widely used in the medical field because of its excellent feature that the inside of the human body can be observed from the outside. In addition, since the inside of various industrial products can be inspected nondestructively, it is gradually becoming popular in the industrial field in recent years.
産業用のＸ線CT装置は、通常被検査物を回転させてＸ線
の透過データを得る。したがって、被検査物を保持して
回転する回転装置の回転軸と被検査物の中心線とを一致
させる必要がある。An industrial X-ray CT apparatus usually rotates an object to be inspected to obtain X-ray transmission data. Therefore, it is necessary to align the rotation axis of the rotating device that holds and rotates the inspection object with the center line of the inspection object.
従来のＸ線CT装置では、この被検査物の中心線を回転装
置の回転軸に合わせるための特別の装置、手段は設けら
れておらず、かかる操作は観測者の経験や技量に頼る手
作業で行っていた。The conventional X-ray CT apparatus is not provided with any special device or means for aligning the center line of the object to be inspected with the rotation axis of the rotating device, and such an operation depends on the experience and skill of the observer. I was going there.
（発明が解決しようとする課題） ところで、被検査物の中心線と回転装置の回転軸とが一
致せず被検出物の中心線が傾ていると、回転装置の回転
に伴って被検査物は歳差運動を行う。この状態で断層像
の再構成を行っても、被検査物がＸ線ビームからはずれ
たり、透過データが欠如して明瞭な断層像は得られな
い。10μｍ程度の高い分解能が要求される産業用のＸ線
CT装置では、特に被検査物の中心線を厳密に回転装置の
回転軸と一致させなければ正確な形状測定はできない。(Problems to be Solved by the Invention) By the way, when the center line of the object to be inspected and the rotation axis of the rotating device do not match and the center line of the object to be detected is inclined, the object to be inspected is accompanied by the rotation of the rotating device. Performs precession exercises. Even if the tomographic image is reconstructed in this state, a clear tomographic image cannot be obtained because the inspection object deviates from the X-ray beam or transmission data is lacking. Industrial X-ray that requires high resolution of about 10 μm
In the CT device, accurate shape measurement cannot be performed unless the center line of the object to be inspected is exactly aligned with the rotation axis of the rotation device.
しかし、従来のように手作業で被検査物の中心線を回転
装置の回転軸に会わせる方法では、通常何回かの試行錯
誤を繰り返さなければらず被検査物の設置に時間がかか
り、装置の利用効率が悪い。また、従来の方法では、中
心線と回転軸とを合わせても、その精度には限界があ
り、操作の再現性にも乏しい。However, in the conventional method of manually aligning the center line of the object to be inspected with the rotation axis of the rotating device, it takes time to set up the object to be inspected because it usually requires repeated trial and error. Is not used efficiently. Further, in the conventional method, even if the center line and the rotation axis are aligned with each other, the accuracy is limited and the reproducibility of the operation is poor.
本発明は上記事情に基づいてなされたものであり、簡便
な手段で被検査物の中心線を回転装置の回転軸に一致さ
せることのできるＸ線CT装置を提供することを目的とす
るものである。The present invention has been made based on the above circumstances, and it is an object of the present invention to provide an X-ray CT apparatus capable of aligning the center line of an object to be inspected with the rotation axis of a rotating device by a simple means. is there.
前記の目的を達成するために本発明に係るＸ線CT装置
は、扇状のＸ線ビームを発生するＸ線発生装置と、被検
査物を回転させる回転装置と、該回転装置を介して前記
Ｘ線発生装置と対向して配置され前記Ｘ線発生装置によ
り放射され前記被検査物を透過過した後のＸ線を検出す
るＸ線検出装置とを有し、前記回転装置によって前記被
検査物を微小角度づつ回転させてＸ線の透過データを収
集し、該透過データにより前記被検査物の断層像を再構
成して画像表示装置に表示するＸ線CT装置において、 各々の角度位置における前記透過データを前記画像表示
装置に順次並べて表示したときに、各透過データによる
像の中心と前記回転装置の回転軸に対応する中心軸との
距離が最大になるときの距離に基づき、前記被検査物の
中心線の前記回転軸に対する傾きの方向及びその角度を
求める傾き検出手段と、 該傾き検出手段により求めた前記被検査物の中心線の前
記回転軸に対する傾きの方向及びその角度に基づいて、
前記回転装置の回転軸の対する被検査物の角度を変化さ
せて前記中心線を前記回転軸に一致させる角度調整手段
とを設けたことを特徴とするものである。In order to achieve the above-mentioned object, an X-ray CT apparatus according to the present invention is an X-ray generator that generates a fan-shaped X-ray beam, a rotating device that rotates an object to be inspected, and the X-ray generator through the rotating device. An X-ray detector arranged to face the X-ray generator and radiated by the X-ray generator to detect X-rays that have passed through the object to be inspected. In an X-ray CT apparatus that collects X-ray transmission data by rotating by a small angle, reconstructs a tomographic image of the inspection object based on the transmission data, and displays the image on an image display device, the transmission at each angular position When the data is sequentially arranged and displayed on the image display device, the object to be inspected is based on the distance when the distance between the center of the image by each transmission data and the central axis corresponding to the rotation axis of the rotation device becomes maximum. On the axis of rotation of the center line of And tilt detection means for determining the direction and the angle of inclination of, based on the direction and the angle of inclination with respect to the rotation axis of the center line of the inspection object as determined by the detecting means-out inclined,
Angle adjusting means for changing the angle of the object to be inspected with respect to the rotation axis of the rotating device to match the center line with the rotation axis is provided.
本発明に係るＸ線CT装置は前記の構成によって、被検査
物を微小角度づつ回転させて被検査物にＸ線を放射する
ことにより得られたそれぞれの角度位置におけるＸ線の
透過データを用いて、被検査物のスライス画像を画像表
示装置の画面上に並べて同時に表示すると、被検査物の
回転角度の変化に応じて画面上で被検査物のスライス画
像の中心と回転装置の回転軸に対応する中心軸との距離
が変化する。傾き検出手段はこの距離が最大となるとき
の距離に基づいて、被検査物の中心線が傾いている方向
及びその角度を検出する。The X-ray CT apparatus according to the present invention uses the X-ray transmission data at each angular position obtained by rotating the inspection object by a minute angle and irradiating the inspection object with X-rays by the above-described configuration. When the slice images of the inspection object are displayed side by side on the screen of the image display device at the same time, the center of the slice image of the inspection object and the rotation axis of the rotating device are displayed on the screen according to the change of the rotation angle of the inspection object. The distance from the corresponding central axis changes. The tilt detecting means detects the direction in which the center line of the inspection object is tilted and its angle based on the distance when the distance is maximum.
角度調整手段は、傾き検出手段によって得られた傾きの
方向及びその角度に基づいて回転装置の回転軸に対する
被検査物の角度を変化させて、被検査物の中心線を回転
装置の回転軸に一致させる。The angle adjusting means changes the angle of the object to be inspected with respect to the rotation axis of the rotating device on the basis of the inclination direction and the angle obtained by the inclination detecting means, and sets the center line of the object to be inspected as the rotating axis of the rotating device. Match.
以下に本発明の一実施例について図面を参照しつつ説明
する。第１図は本発明の一実施例であるＸ線CT装置の配
置図である。同図に示すＸ線発生装置は、被検査物Ａに
向けて扇状のＸ線ビームを発生する微小焦点のＸ線発生
装置１、被検査物Ａを保持しその方向を任意に変えるこ
とのできる被検査物保持装置２、被検査物保持装置によ
って保持された被検査物Ａを回転させる回転テーブル
３、被検査物Ａを透過した後のＸ線を検出するＸ線検出
器４、及びＸ線検出器によって得られた多数のＸ線透過
データを処理しCT画像を再構成して画像表示装置5aに表
示するコンピュータ５により構成される。尚、Ｘ線発生
装置１と被検査物Ａとの距離をａ、被検査物ＡとＸ線検
出器４との距離をｂとする。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a layout view of an X-ray CT apparatus which is an embodiment of the present invention. The X-ray generator shown in the figure can hold the micro-focus X-ray generator 1 that generates a fan-shaped X-ray beam toward the inspection object A and the inspection object A, and change its direction arbitrarily. Inspected object holding device 2, rotating table 3 for rotating inspected object A held by the inspected object holding device, X-ray detector 4 for detecting X-rays after passing through inspected object A, and X-ray The computer 5 is configured to process a large number of X-ray transmission data obtained by the detector, reconstruct a CT image, and display it on the image display device 5a. The distance between the X-ray generator 1 and the inspection object A is a, and the distance between the inspection object A and the X-ray detector 4 is b.
第２図は被検査物Ａとこれを通過する扇状のＸ線ビーム
７を横から見た図であり、ｈは被検査物保持装置２の最
上面を基準としたＸ線ビーム７（スライス面）の高さ、
θは被検査物Ａの中心線８と回転軸９がなす角、ｒはＸ
線ビームの面内での回転軸９と被検査物の中心線８との
距離である。したがって、第２図においては tanθ＝r/h （１） の関係がある。第２図の配置で、被検査物Ａのそれぞれ
の角度位置におけるＸ線を検出して得られた透過データ
は、数値化されてコンピュータ５内部のメモリに記憶さ
れる。FIG. 2 is a side view of the inspection object A and a fan-shaped X-ray beam 7 passing through the inspection object A, and h is the X-ray beam 7 (slice surface) with the uppermost surface of the inspection object holding device 2 as a reference. ) Height,
θ is the angle between the center line 8 of the inspection object A and the rotation axis 9, and r is X
It is the distance between the rotation axis 9 and the center line 8 of the inspection object in the plane of the line beam. Therefore, in FIG. 2, there is a relationship of tan θ = r / h (1). The transmission data obtained by detecting the X-rays at the respective angular positions of the inspection object A in the arrangement of FIG. 2 is digitized and stored in the memory inside the computer 5.
更に、これらの透過データをコンピュータ５の画像表示
装置5aの画面上に表示するとスライス画像を並べたもの
となり、この中でＸ線が吸収される被検査物の部分は、
たとえば黒くなって現れる。第３図は回転テーブル３を
回転させることによって、たとえば180度の角度範囲に
わたってＸ線の透過データの収集をＮ回行い、こうして
得られるＮ個のスライス画像を順に一つの画面上に並べ
て同時に表示したものの一例を示す図である。Furthermore, when these transmission data are displayed on the screen of the image display device 5a of the computer 5, slice images are arranged side by side, and the portion of the inspection object in which X-rays are absorbed is:
For example, it appears black. FIG. 3 shows that by rotating the rotary table 3, X-ray transmission data is collected N times over an angular range of 180 degrees, and N slice images obtained in this way are sequentially arranged and displayed on one screen at the same time. It is a figure which shows an example of what was done.
第３図において曲線ｊ（同図の点線）は被検査物Ａの中
心の軌跡に対応し、画面の中央の中心軸（一点鎖線）ｋ
は回転テーブル３の回転軸に対応するよう予め設定され
ている。被検査物Ａの中心線が第２図のように回転軸か
ら傾いていると、被検査物Ａの中心線は回転テーブル３
の回転に伴って歳差運動を行うので、第３図におけるス
ライス画像の中心の軌跡は中心軸ｋから逸脱する曲線ｊ
となる。また、第３図に示すスライス像画は、被検査物
ＡをＸ線検出器４の位置に拡大投影した像として検出さ
れるもので、曲線ｊの中心線ｋからのずれの最大値がＲ
であったとすると、 Ｒ＝ｒ（ａ＋ｂ）/a （２） という関係が成り立つ。したがって（１）式より、 θ＝tab-1Ra/h（ａ＋ｂ） （３） が得られ、この式からθを求めることができる。次に、
第４図に示すように被検査物支持装置２上においてスラ
イス面の法線に一致する回転テーブル３の回転軸方向を
ｚ軸、回転軸からみたＸ線発生装置の方向をｘ軸、これ
らに垂直な方向をｙ軸とする座標系を定義する。ここ
で、被検査物Ａの中心線をｘ−ｙ面に射影した直線ｄが
ｘ軸となす角をφとすると、第３図の曲線ｊの中心軸ｋ
からのずれが最大値Ｒとなるのは、回転テーブル３の回
転角度がπ/2−φとなったときである。しがって、第３
図に示すずれの最大値Ｒの角度位置からφを求めること
ができる。In FIG. 3, a curve j (dotted line in the same figure) corresponds to the locus of the center of the inspection object A, and the central axis (dashed line) k at the center of the screen
Is preset so as to correspond to the rotation axis of the turntable 3. When the center line of the inspection object A is inclined from the rotation axis as shown in FIG.
Since a precession motion is performed in association with the rotation of, the locus of the center of the slice image in FIG. 3 has a curve j deviating from the central axis k.
Becomes The slice image shown in FIG. 3 is detected as an image obtained by enlarging and projecting the inspection object A at the position of the X-ray detector 4, and the maximum value of the deviation of the curve j from the center line k is R.
Then, the relation of R = r (a + b) / a (2) holds. Therefore, θ = tab −1 Ra / h (a + b) (3) is obtained from the equation (1), and θ can be obtained from this equation. next,
As shown in FIG. 4, the rotation axis direction of the rotary table 3 which coincides with the normal line of the slice surface on the inspection object supporting device 2 is the z axis, and the direction of the X-ray generator viewed from the rotation axis is the x axis. Define a coordinate system with the y-axis in the vertical direction. Here, when the angle formed by the straight line d projecting the center line of the inspection object A on the xy plane and the x axis is φ, the center axis k of the curve j in FIG.
The deviation from the maximum value R becomes when the rotation angle of the turntable 3 becomes π / 2−φ. Therefore, the third
Φ can be obtained from the angular position of the maximum deviation R shown in the figure.
更に、第４図に示す二つの角度α，βは、 α＝tan-1（rcosφ/h） ＝tan-1（aRcosφ/h（ａ＋ｂ）） （４） β＝tan-1（rsinφ/h） ＝tan-1（aRsinφ/h（ａ＋ｂ）） （５） で表すことができる。コンピュータ５は（４）式及び
（５）式に基づいてα及びβの値を求め、その信号を角
度調整手段（図示せず）に送る。Further, the two angles α and β shown in FIG. 4 are α = tan −1 (rcosφ / h) = tan −1 (aRcosφ / h (a + b)) (4) β = tan −1 (rsinφ / h) = Tan −1 (aRsinφ / h (a + b)) (5) The computer 5 obtains the values of α and β based on the equations (4) and (5) and sends the signals to the angle adjusting means (not shown).
角度調整手段は、たとえばステップパルスモータによ
り、コンピュータ５からの信号を受けて被検査物保持装
置２を任意の方向に回転させることができるように構成
されている。したがって、回転テーブル３を再び第４図
に示す最初の回転角度位置に戻し、被検査物保持装置２
をｚ−ｘ面内でα、ｙ−ｚ面内でβだけ傾けることによ
って被検査物Ａの中心線８を回転テーブル３の回転軸９
に一致させることができる。The angle adjusting means is configured to be capable of receiving the signal from the computer 5 and rotating the inspection object holding device 2 in an arbitrary direction by, for example, a step pulse motor. Therefore, the rotary table 3 is returned to the initial rotation angle position shown in FIG.
By inclining by α in the z-x plane and β in the yz-plane, the center line 8 of the inspection object A is rotated by the rotation axis 9 of the rotary table 3.
Can be matched to.
上記ステップパルスモータの代わりにゴニオメータを設
け、手動で角度の調整を行う構成とすることもできる。A goniometer may be provided instead of the step pulse motor to manually adjust the angle.
このように、被検査物Ａの中心線８と回転テーブルの回
転軸９を一致させて第３図と同様の画像を得ると、被検
査物の中心の軌跡（曲線ｊ）は中心軸ｋに一致する直線
となり、それぞれの角度位置におけるスライス画像は縦
一列に並ぶ。この様な操作を行った後に収集されたＸ線
の透過データに基づいてCT画像を再構成すれば、明瞭な
CT画像が得られる。In this way, when the center line 8 of the inspection object A and the rotation axis 9 of the rotary table are aligned to obtain an image similar to that of FIG. 3, the locus (curve j) of the center of the inspection object is the center axis k. The straight lines coincide with each other, and the slice images at the respective angular positions are lined up in a vertical line. If a CT image is reconstructed based on the X-ray transmission data collected after performing such an operation, a clear image can be obtained.
CT images can be obtained.
尚、本発明は、上記の実施例に限定されるものではな
く、たとえば回転テーブル３を第３図において最大値Ｒ
となる角度で停止し、被検査物Ａをｙ−ｚ平面内で角度
θだけ傾けて、被検査物Ａの中心線８を回転テーブル３
の回転軸に一致させるようにしてもよい。The present invention is not limited to the above-described embodiment, and for example, the rotary table 3 may have a maximum value R in FIG.
Is stopped at an angle such that the inspection object A is tilted by an angle θ in the yz plane, and the center line 8 of the inspection object A is rotated by the rotary table 3.
You may make it match with the rotation axis of.
以上説明したように本発明によれば、被検査物のＸ線透
過データを利用して回転装置上における被検査物の傾き
の方向及びその角度を求めることができ、この求めた角
度から被検査物の中心線が回転装置の回転軸と一致する
よう被検査物の傾きを簡単に修正することができるの
で、従来歳差運動を起こし易かった数ミリ程度の細い管
状又は棒状の材料についても、正確な断層像を得ること
のできるＸ線CT装置を提供することができる。As described above, according to the present invention, the direction and the angle of the inclination of the inspection object on the rotating device can be obtained by using the X-ray transmission data of the inspection object, and the inspection angle is obtained from the obtained angle. Since the inclination of the object to be inspected can be easily corrected so that the center line of the object coincides with the rotation axis of the rotating device, even for a thin tubular or rod-shaped material of about several millimeters that was easy to cause precession in the past, An X-ray CT apparatus capable of obtaining an accurate tomographic image can be provided.
第１図は本発明の一実施例であるＸ線CT装置の配置図、
第２図は被検査物とこれを通過する扇状のＸ線ビームを
横から見た図、第３図は回転テーブルを回転させること
により所定の角度範囲にわたって収集されたＸ線の透過
データのスライス画像を一つの画面上に並べて同時に表
示したものの一例を示す図、第４図は定義した座標系と
ともに示す回転テーブル、被検査物支持装置、及び被検
査物の斜視図である。 １……Ｘ線発生装置、２……被検査物支持装置、 ３……回転テーブル、４……Ｘ線検出器、 ５……コンピュータ、７……Ｘ線ビーム、 ８……被検査物の中心線、９……回転軸、 Ａ……被検査物。FIG. 1 is a layout drawing of an X-ray CT apparatus which is an embodiment of the present invention,
FIG. 2 is a side view of an object to be inspected and a fan-shaped X-ray beam passing therethrough, and FIG. 3 is a slice of X-ray transmission data collected over a predetermined angle range by rotating a rotary table. FIG. 4 is a diagram showing an example in which images are displayed side by side on one screen, and FIG. 4 is a perspective view showing a rotary table, an inspection object supporting device, and an inspection object together with a defined coordinate system. DESCRIPTION OF SYMBOLS 1 ... X-ray generator, 2 ... Support device for inspected object, 3 ... Rotating table, 4 ... X-ray detector, 5 ... Computer, 7 ... X-ray beam, 8 ... Inspected object Center line, 9 ... Rotation axis, A ... Inspected object.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 林 一雄 神奈川県相模原市淵野辺５丁目10番１号 新日本製鐵株式會社エレクトロニクス研究 所内 (56)参考文献 特開 平３−46546（ＪＰ，Ａ) 特開 平２−156931（ＪＰ，Ａ) 特開 平２−138854（ＪＰ，Ａ) 特開 平２−138806（ＪＰ，Ａ) 特開 平２−91553（ＪＰ，Ａ) 特開 平２−85747（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Hayashi 5-10-1, Fuchinobe, Sagamihara City, Kanagawa Pref., Electronics Research Laboratory, Nippon Steel Corp. (56) Reference JP-A-3-46546 (JP, A) JP-A-2-156931 (JP, A) JP-A-2-138854 (JP, A) JP-A-2-138806 (JP, A) JP-A-2-91553 (JP, A) JP-A-2-85747 (JP, A)
Claims (1)
と、 被検査物を回転させる回転装置と、該回転装置を介して
前記Ｘ線発生装置と対向して配置され前記Ｘ線発生装置
により放射され前記被検査物を透過した後のＸ線を検出
するＸ線検出装置とを有し、 前記回転装置によって、前記被検査物を微小角度づつ回
転させてＸ線の透過データを収集し、該透過データによ
り前記被検査物の断層像を再構成して画像表示装置に表
示するＸ線CT装置において、 各々の角度位置における前記透過データを前記画像表示
装置に順次並べて表示したときに、各透過データによる
像の中心と前記回転装置の回転軸に対応する中心軸との
距離が最大になるときの距離に基づき、前記被検査物の
中心線の前記回転軸に対する傾きの方向及びその角度を
求める傾き検出手段と、 該傾き検出手段により求めた前記被検査物の中心線の前
記回転軸に対する傾きの方向及びその角度に基づいて、
前記回転装置の回転軸に対する被検査物の角度を変化さ
せて前記中心線を前記回転軸に一致させる角度調整手段
とを設けたことを特徴とするＸ線CT装置。1. An X-ray generator that generates a fan-shaped X-ray beam, a rotating device that rotates an object to be inspected, and an X-ray generator that is arranged to face the X-ray generator through the rotating device. An X-ray detection device for detecting X-rays radiated by the device and transmitted through the inspection object, wherein the inspection device rotates the inspection object by a minute angle to collect X-ray transmission data. Then, in an X-ray CT apparatus that reconstructs a tomographic image of the inspection object by the transmission data and displays it on an image display device, when the transmission data at each angular position are sequentially arranged and displayed on the image display device. A direction of inclination of the center line of the object to be inspected with respect to the rotation axis based on the distance when the distance between the center of the image based on each transmission data and the center axis corresponding to the rotation axis of the rotation device becomes maximum and Inclination to find the angle Detection means, based on the direction and the angle of inclination with respect to the rotation axis of the center line of the inspection object as determined by the detecting means-out inclined,
An X-ray CT apparatus, comprising: angle adjusting means for changing an angle of an object to be inspected with respect to a rotation axis of the rotation apparatus so that the center line coincides with the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004258A JPH0692888B2 (en) | 1990-01-10 | 1990-01-10 | X-ray CT system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004258A JPH0692888B2 (en) | 1990-01-10 | 1990-01-10 | X-ray CT system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03209119A JPH03209119A (en) | 1991-09-12 |
| JPH0692888B2 true JPH0692888B2 (en) | 1994-11-16 |
Family
ID=11579516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004258A Expired - Lifetime JPH0692888B2 (en) | 1990-01-10 | 1990-01-10 | X-ray CT system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0692888B2 (en) |
Cited By (2)
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|---|---|---|---|---|
| KR20210120907A (en) * | 2020-03-27 | 2021-10-07 | 폴 코포레이션 | Tube retainers, tube retainer sets, and tube management systems |
| US12171962B2 (en) | 2015-07-13 | 2024-12-24 | Biotronik Ag | Mechanically actuated and functionally integratable catheter system for treating vascular and non-vascular diseases and related methods |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004132709A (en) * | 2002-10-08 | 2004-04-30 | Sony Corp | Image information processing apparatus and method, recording medium, and program |
| US7532750B2 (en) | 2002-04-17 | 2009-05-12 | Sony Corporation | Image processing apparatus and method, program, and image processing system |
| JP4178399B2 (en) * | 2003-09-25 | 2008-11-12 | 株式会社島津製作所 | X-ray CT system |
| DE102005039422A1 (en) * | 2005-08-16 | 2007-02-22 | Carl Zeiss Industrielle Messtechnik Gmbh | Computed Tomography Measurement System and Method |
| JP6915374B2 (en) * | 2017-05-19 | 2021-08-04 | 富士通株式会社 | X-ray analysis method and X-ray analyzer |
| JP6858372B2 (en) * | 2017-06-22 | 2021-04-14 | リョーエイ株式会社 | Product X-ray CT inspection method |
-
1990
- 1990-01-10 JP JP2004258A patent/JPH0692888B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12171962B2 (en) | 2015-07-13 | 2024-12-24 | Biotronik Ag | Mechanically actuated and functionally integratable catheter system for treating vascular and non-vascular diseases and related methods |
| KR20210120907A (en) * | 2020-03-27 | 2021-10-07 | 폴 코포레이션 | Tube retainers, tube retainer sets, and tube management systems |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03209119A (en) | 1991-09-12 |
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