JP4655673B2 - X-ray equipment - Google Patents
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- JP4655673B2 JP4655673B2 JP2005051292A JP2005051292A JP4655673B2 JP 4655673 B2 JP4655673 B2 JP 4655673B2 JP 2005051292 A JP2005051292 A JP 2005051292A JP 2005051292 A JP2005051292 A JP 2005051292A JP 4655673 B2 JP4655673 B2 JP 4655673B2
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- 238000003384 imaging method Methods 0.000 claims description 105
- 238000001514 detection method Methods 0.000 claims description 28
- 238000009434 installation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
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- 238000002594 fluoroscopy Methods 0.000 description 3
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Description
本発明は、一般用Ｘ線撮影装置において、異なる撮影術式に対応して、Ｘ線管焦点位置とフィルム間との距離を自動的に演算駆動制御を行うためのＸ線制御システムの改良技術に関する。 The present invention relates to an improved X-ray control system for automatically calculating and controlling the distance between an X-ray tube focal position and a film in accordance with different imaging techniques in a general X-ray imaging apparatus. About.
撮影術式の違いにより、被検者が撮影台１３の上に臥位で撮影する術式では図２のようにフィルム・カセット９は撮影台１３の下のブッキー１４の中に入れられるが、一般撮影の術式ではフィルム・カセット９は被検者の撮影部位の直下でかつ図１に示すように撮影台１３の上面に置かれる。この場合でも、常にＸ線管焦点８ａとブッキー１４に挿入されたフィルム・カセット９との間の距離を撮影距離とするような制御しか行われていなかった。
例えばフィルム・カセット９をＸ線撮影台装置２の撮影台１３の上に置いて撮影するような、一般撮影の術式を選択しても、フィルム・カセット９がブッキー１４の中に挿入されているかのように、撮影距離が制御されていたため、撮影距離の制御が不正確であった。 For example, the film cassette 9 is inserted into the bucky 14 even if a general imaging technique is selected such that the film cassette 9 is placed on the imaging table 13 of the X-ray imaging table apparatus 2 for imaging. Since the shooting distance was controlled, the shooting distance was not accurately controlled.
請求項１記載の発明は上記の目的を達成するために、Ｘ線管装置と、撮影用検出器および透視用検出器を有する撮影台と、上下動可能にＸ線管装置を保持し、かつＸ線管焦点の上下方向の位置を前記撮影用検出器の撮影受光面を基準にして検出する位置検出手段を有するＸ線管保持装置から構成される透視機能搭載型Ｘ線撮影システムにおいて、撮影時のＸ線管焦点の前記撮影受光面を基準にした位置を設定する撮影位置設定手段と、前記位置検出手段により検出される位置と前記撮影位置設定手段により設定された位置が一致したことを通知する撮影位置通知手段と、前記撮影位置設定手段に設定された位置より前記透視用検出器の透視受光面と前記撮影受光面の高さ方向の距離だけ前記撮影受光面に近い位置を設定する透視位置設定手段と、前記位置検出手段により検出される位置が前記透視位置設定手段により設定された位置と一致したことを通知する透視位置通知手段を設けたことを特徴とする透視機能搭載型Ｘ線撮影システムを提供する。 For a first aspect of the present invention to achieve the above object, holding the X-ray tube apparatus, the imaging table having an imaging detector and fluoroscopic detector, a vertically movable X-ray tube device, and In an X-ray imaging system equipped with a fluoroscopic function, the X-ray imaging system includes an X-ray tube holding device having position detection means for detecting the vertical position of the X-ray tube focal point with reference to the imaging light receiving surface of the imaging detector. An imaging position setting means for setting the position of the X-ray tube focal point at the time with reference to the imaging light receiving surface, and that the position detected by the position detection means matches the position set by the imaging position setting means. An imaging position notifying unit for notifying, and a position close to the imaging light receiving surface by a distance in a height direction between the fluoroscopic light receiving surface of the fluoroscopic detector and the imaging light receiving surface is set from the position set in the imaging position setting unit. Perspective position setting means A fluoroscopy function-equipped X-ray imaging system is provided, comprising fluoroscopy position notification means for notifying that the position detected by the position detection means coincides with the position set by the fluoroscopy position setting means. To do.
請求項２の発明は、Ｘ線管を上部に懸架し、かつ上下駆動するＸ線管上下駆動部を備えたＸ線管懸架装置と、前記Ｘ線管の下部に設置され、被検者を載架する撮影台とを有するＸ線撮影台装置とを備え、撮影術式に応じて異なる高さ位置に平面検出手段が設置されるＸ線撮影装置であって、前記平面検出手段のいずれかの設置位置を基準位置として、これに対する前記Ｘ線管の高さ位置を検知して出力するＸ線管位置検出手段と、前記撮影術式を入力すると共に、前記撮影術式毎に前記基準位置に対する前記平面検出手段の各設置高さ位置を記憶し、入力された撮影術式に対応する前記設置高さ位置信号を出力する設定条件入力手段と、前記設定条件入力手段からの設置高さ位置信号と、前記Ｘ線管位置検出手段からのＸ線管の高さ位置信号と、平面検出手段とＸ線管の焦点位置間の設定距離とから、前記平面検出手段と前記Ｘ線管の焦点位置間の距離を前記設定距離に合致させるよう前記Ｘ線管上下駆動部を駆動制御する駆動制御手段を設けたことを特徴とする。 The invention of claim 2 is an X-ray tube suspension device having an X-ray tube vertical drive unit for suspending an X-ray tube at the top and driving up and down, and installed at a lower part of the X-ray tube. An X-ray imaging apparatus comprising: an X-ray imaging table apparatus having an imaging table to be mounted, wherein the plane detection means is installed at different height positions according to the imaging technique, and any one of the plane detection means The X-ray tube position detecting means for detecting and outputting the height position of the X-ray tube with respect to the installation position of the X-ray tube, and inputting the imaging technique, and the reference position for each imaging technique Setting condition input means for storing each installation height position of the plane detection means with respect to and outputting the installation height position signal corresponding to the inputted photographing technique, and the installation height position from the setting condition input means Signal and height position signal of the X-ray tube from the X-ray tube position detecting means The X-ray tube vertical drive unit is driven so that the distance between the plane detection unit and the focal position of the X-ray tube matches the set distance from the set distance between the plane detection unit and the focal position of the X-ray tube. A drive control means for controlling is provided.
請求項３の発明は、前記平面検出器が、フィルム・カセット又はフラットパネルディテクタであることを特徴とする。 The invention according to claim 3 is characterized in that the flat detector is a film cassette or a flat panel detector.
撮影術式および撮影距離の選択に対応した最適な撮影距離が自動的に制御されるため、常に適正な撮影距離での撮影が達成される。 Since the optimal shooting distance corresponding to the selection of the shooting technique and shooting distance is automatically controlled, shooting at an appropriate shooting distance is always achieved.
本発明のＸ線撮影装置では撮影術式を設定する事により自動的にフィルム・カセットの高さ位置とＸ線管焦点位置との距離が正確に演算され、別に設定された所望の撮影距離が達成されるべくＸ線管懸架装置上下駆動部やＸ線撮影台上下駆動部が位置制御される。 In the X-ray imaging apparatus of the present invention, the distance between the height position of the film cassette and the X-ray tube focal position is automatically calculated accurately by setting the imaging technique, and the desired imaging distance set separately is obtained. To achieve this, the position of the vertical drive unit for the X-ray tube suspension and the vertical drive unit for the X-ray imaging table is controlled.
本発明のＸ線撮影装置の一実施例を、図１、図２、図３を参照しながら説明する。
図１、図２でＸ線管８はＸ線管焦点８ａで示される位置にＸ線管上下駆動部１１を備えたＸ線管懸架装置１によって部屋の天井から懸架されている。その下部に撮影台上下駆動部１２を備えたＸ線撮影台装置２及びその撮影台１３とが設置されており、フィルム・カセット９は図１のように撮影台１３の上に置く場合と、図２のように撮影台１３の下のブッキー１４の中に挿入される場合とがある。
図１は一般撮影術式の場合で、フィルム・カセッット９は被検者の撮影部位の直下でかつ撮影台１３の上におかれた状態で撮影が行われる。
An embodiment of the X-ray imaging apparatus of the present invention will be described with reference to FIGS.
1 and 2, the X-ray tube 8 is suspended from the ceiling of the room by an X-ray tube suspension device 1 having an X-ray tube vertical drive unit 11 at a position indicated by an X-ray tube focal point 8a. The X-ray imaging table apparatus 2 provided with the imaging table vertical drive unit 12 and the imaging table 13 are installed in the lower part, and the film cassette 9 is placed on the imaging table 13 as shown in FIG. As shown in FIG. 2, it may be inserted into the bucky 14 under the imaging table 13.
FIG. 1 shows a case of a general photographing technique, and photographing is performed in a state where the film cassette 9 is placed directly under the photographing part of the subject and on the photographing table 13.
図２では被検者が撮影台１３の上に臥位の状態で撮影が行われるためフィルム・カセット９は邪魔にならないように撮影台１３の下のブッキー１４の中に挿入した状態で撮影がおこなわれる。 In FIG. 2, since the subject is photographed in a prone position on the photographing table 13, photographing is performed with the film cassette 9 inserted into the bucky 14 under the photographing table 13 so as not to interfere. It is carried out.
図１、図２に示すＸ線管高さ検出部１５及び撮影台高さ検出部１６は、Ｘ線管８または撮影台１３の上下位置の移動量をポテンショメータの回転量として検出して、この信号を図３で示すＸ線管高さ出力回路５またはＸ線撮影台高さ出力回路６にそれぞれ伝達する構成になっている。 The X-ray tube height detection unit 15 and the imaging table height detection unit 16 shown in FIGS. 1 and 2 detect the amount of movement of the vertical position of the X-ray tube 8 or imaging table 13 as the amount of rotation of the potentiometer. The signal is transmitted to the X-ray tube height output circuit 5 or the X-ray imaging table height output circuit 6 shown in FIG.
図３はＸ線撮影において前記Ｘ線管焦点８ａとフィルム・カセット９間の撮影距離の演算駆動制御を行うための本発明のＸ線制御システムの一実施例を説明するためのブロック図を示しており、撮影術式を設定するための撮影術式入力回路３、Ｘ線管焦点８ａと撮影台１３との高さ位置信号を検出して入力するためのＸ線管高さ出力回路５とＸ線撮影台高さ出力回路６とが設けられ、これらは中央の演算回路７に入力されて現在の到達撮影距離が計算される。撮影術式入力回路３は、撮影術式を入力すると共に、撮影術式毎に前記基準位置に対する、設置される前記フィルム・カセット９の高さ位置を記憶しており、入力された撮影術式に対応する高さ位置信号を出力する機能を備えている。本実施例の場合、フィルム・カセット９がブッキー１４の中に挿入されて撮影する術式が設定された場合、０を、また撮影台１３の上に置いて撮影する術式が設定された場合、ブッキー１４の中に挿入された状態のフィルム・カセット９の高さと、撮影台１３上のフィルム・カセット９までの距離を出力する。 FIG. 3 is a block diagram for explaining an embodiment of the X-ray control system of the present invention for performing calculation drive control of the imaging distance between the X-ray tube focal point 8a and the film cassette 9 in X-ray imaging. An imaging technique input circuit 3 for setting an imaging technique; an X-ray tube height output circuit 5 for detecting and inputting a height position signal between the X-ray tube focal point 8a and the imaging table 13; An X-ray imaging table height output circuit 6 is provided, and these are input to the central arithmetic circuit 7 to calculate the current reach imaging distance. The imaging technique input circuit 3 inputs the imaging technique and stores the height position of the film cassette 9 to be installed with respect to the reference position for each imaging technique. Has a function of outputting a height position signal corresponding to. In this embodiment, when the film cassette 9 is inserted into the bucky 14 and the shooting method is set, 0 is set on the shooting table 13 and the shooting method is set. The height of the film cassette 9 inserted into the bucky 14 and the distance to the film cassette 9 on the photographing table 13 are output.
一方撮影距離を設定するための撮影距離入力回路４より設定された目標撮影距離と前記の駆動により到達した距離とが駆動信号出力回路１０に入り比較され、その結果出力は誤差信号としてＸ線管上下駆動部１１と撮影台上下駆動部１２とに入力されて、両駆動部１１、１２が駆動され、その結果、Ｘ線管高さ出力回路５とＸ線撮影台高さ出力回路６とからの位置信号の変化が演算回路７にフィードバックされるため、両駆動部１１、１２の駆動によりＸ線管焦点８ａとフィルム・カセット９との高さ位置が制御されて、前記目標撮影距離すなわち撮影距離の設定値に到達するまで駆動制御がおこなわれて、所望の撮影距離に到達したところで撮影が行われる。 On the other hand, the target shooting distance set by the shooting distance input circuit 4 for setting the shooting distance and the distance reached by the driving are entered into the drive signal output circuit 10 and compared, and as a result, the output is an error signal as an X-ray tube. The signals are input to the vertical drive unit 11 and the imaging table vertical drive unit 12 to drive both the drive units 11 and 12. As a result, the X-ray tube height output circuit 5 and the X-ray imaging table height output circuit 6 Is fed back to the arithmetic circuit 7, the height positions of the X-ray tube focal point 8 a and the film cassette 9 are controlled by driving both the drive units 11 and 12, and the target photographing distance, that is, photographing. Drive control is performed until the distance set value is reached, and shooting is performed when the desired shooting distance is reached.
この制御過程において、撮影台上下駆動部１２の制御は、例えば撮影術式に対応した適切な高さにあらかじめ決定され、撮影距離の制御は主にＸ線管上下駆動により制御されるのが現実的である。但し、撮影台上下駆動部１２を制御し、撮影台１３を上下動させることも可能である。 In this control process, the imaging table vertical drive unit 12 is controlled in advance to an appropriate height corresponding to the imaging technique, for example, and the imaging distance is controlled mainly by the X-ray tube vertical drive. Is. However, it is also possible to move the imaging table 13 up and down by controlling the imaging table vertical drive unit 12.
撮影術式入力回路３は、撮影術式によるフィルム・カセット９が配置される位置の違いを識別して、撮影台１３からフィルム・カセット９までの高さの違いをオフセット値として演算回路７に出力するために使用される。
すなわち、上述した通り、フィルム・カセット９が撮影台１３の上に置かれる一般撮影術式の場合は、Ｘ線撮影台高さ出力回路６で入力されるブッキー１４内のフィルム・カセット９位置よりも前記オフセット値分だけ上側に加算された値を演算回路７に入力することにより、結果としてＸ線管焦点８ａの位置は前記オフセット分だけ高い位置に駆動制御されることにより、実際に合った撮影距離の駆動と制御が可能となる。
The imaging technique input circuit 3 identifies the difference in the position where the film cassette 9 is arranged by the imaging technique, and uses the difference in height from the imaging table 13 to the film cassette 9 as an offset value to the arithmetic circuit 7. Used for output.
That is, as described above, in the case of the general imaging technique in which the film cassette 9 is placed on the imaging table 13, the position of the film cassette 9 in the bucky 14 input by the X-ray imaging table height output circuit 6 is used. Also, the value added to the upper side by the offset value is input to the arithmetic circuit 7, and as a result, the position of the X-ray tube focal point 8a is driven and controlled to a position higher by the offset, so that it is actually matched. It is possible to drive and control the shooting distance.
上述した、演算回路７、駆動信号出力回路１０は、請求項１の駆動制御手段に対応する。
また、上述した実施例では、Ｘ線撮影台装置２は、撮影台上下駆動部１２及び撮影台高さ検出部１６を備え、上下動可能な構成を有するが、固定式のＸ線撮影台装置を用いてもよい。この場合、Ｘ線管高さ検出部１１が、例えば、図２に示されるように、ブッキー１４の中に挿入された状態のフィルム・カセット９の高さ位置を基準位置として、当該位置からＸ線管焦点８ａまでの距離を出力するよう構成するか、或いは、上述した実施例における図３で示した、Ｘ線撮影台高さ出力回路６からの入力に換えて、演算手段７がＸ線管高さ検出部１１からの高さ位置信号から基準位置までの距離を差し引くよう構成すればよい。
The arithmetic circuit 7 and the drive signal output circuit 10 described above correspond to the drive control means of claim 1.
In the above-described embodiment, the X-ray imaging table apparatus 2 includes the imaging table vertical drive unit 12 and the imaging table height detection unit 16 and has a configuration that can move up and down. May be used. In this case, for example, as shown in FIG. 2, the X-ray tube height detection unit 11 uses the height position of the film cassette 9 inserted into the bucky 14 as a reference position, and starts from the position X It is configured to output the distance to the tube tube focal point 8a or, instead of the input from the X-ray imaging table height output circuit 6 shown in FIG. What is necessary is just to comprise so that the distance from the height position signal from the pipe height detection part 11 to a reference | standard position may be subtracted.
なお、平面Ｘ線検出手段として、フィルム・カセットを例に説明したが、本発明は、平面的な検出器であれば、なんでもよく、例えば、入射したＸ線を変換膜を介して２次元のデジタルデータとして出力するフラットパネルディテクタであってもよい。 Although the film cassette has been described as an example of the planar X-ray detection means, the present invention may be any planar detector. For example, incident X-rays are two-dimensionally converted through a conversion film. It may be a flat panel detector that outputs as digital data.
一般Ｘ線撮影装置の撮影距離の演算制御において、撮影ユニットの違いによるフィルム位置の違いを補正するために本発明が利用可能である。 In the calculation control of the photographing distance of the general X-ray photographing apparatus, the present invention can be used to correct a difference in film position due to a difference in photographing unit.
１ Ｘ線管懸架装置
２ Ｘ線撮影台装置
３ 撮影術式入力回路
４ 撮影距離入力回路
５ Ｘ線管高さ出力回路
６ Ｘ線撮影台高さ出力回路
７ 演算回路
８ Ｘ線管
８ａ Ｘ線管焦点
９ フィルム・カセット
１０ 駆動信号出力回路
１１ Ｘ線管上下駆動部
１２ 撮影台上下駆動部
１３ 撮影台
１４ ブッキー
１５ Ｘ線管高さ検出部
１６ 撮影台高さ検出部
DESCRIPTION OF SYMBOLS 1 X-ray tube suspension apparatus 2 X-ray imaging stand apparatus 3 Imaging technique input circuit 4 Imaging distance input circuit 5 X-ray tube height output circuit 6 X-ray imaging stand height output circuit 7 Arithmetic circuit 8 X-ray tube 8a X-ray Tube focus 9 Film cassette 10 Drive signal output circuit 11 X-ray tube vertical drive unit 12 Imaging table vertical drive unit 13 Imaging table 14 Bucky 15 X-ray tube height detection unit 16 Imaging table height detection unit
Claims (3)
前記平面検出手段のいずれかの設置位置を基準位置として検知する撮影台位置検出手段と、前記Ｘ線管の高さ位置を検知して出力するＸ線管位置検出手段と、前記撮影術式を入力すると共に、前記撮影術式毎に前記基準位置に対する前記平面検出手段の各設置高さ位置を記憶し、入力された撮影術式に対応する前記設置高さ位置信号を出力する設定条件入力手段と、前記設定条件入力手段からの設置高さ位置信号と、前記Ｘ線管位置検出手段からのＸ線管の高さ位置信号と、前記撮影台位置検出手段からの位置信号と、平面検出手段とＸ線管の焦点位置間の設定距離とから、前記平面検出手段と前記Ｘ線管の焦点位置間の距離を前記設定距離に合致させるよう前記Ｘ線管上下駆動部又は前記撮影台上下駆動部を駆動制御する駆動制御手段を設けたことを特徴とするＸ線撮影装置。 An X-ray tube suspension device having an X-ray tube vertical drive unit that suspends the X-ray tube at the top and drives it up and down, an imaging table that is installed at the bottom of the X-ray tube and carries a subject; In an X-ray imaging apparatus including an X-ray imaging table device having an imaging table vertical drive unit that drives the imaging table up and down, and plane detection means are installed at different height positions according to imaging techniques,
An imaging stand position detecting means for detecting any installation position of the plane detecting means as a reference position, an X-ray tube position detecting means for detecting and outputting a height position of the X-ray tube, and the imaging method Setting condition input means for storing each installation height position of the plane detection means with respect to the reference position for each imaging technique and outputting the installation height position signal corresponding to the inputted imaging technique An installation height position signal from the setting condition input means, an X-ray tube height position signal from the X-ray tube position detection means, a position signal from the imaging table position detection means, and a plane detection means And the set distance between the focal positions of the X-ray tube, the X-ray tube vertical drive unit or the imaging table vertical drive so that the distance between the plane detecting means and the focal position of the X-ray tube matches the set distance. Drive control means for controlling the drive of the X-ray imaging apparatus characterized by a.
前記平面検出手段のいずれかの設置位置を基準位置として、これに対する前記Ｘ線管の高さ位置を検知して出力するＸ線管位置検出手段と、前記撮影術式を入力すると共に、前記撮影術式毎に前記基準位置に対する前記平面検出手段の各設置高さ位置を記憶し、入力された撮影術式に対応する前記設置高さ位置信号を出力する設定条件入力手段と、前記設定条件入力手段からの設置高さ位置信号と、前記Ｘ線管位置検出手段からのＸ線管の高さ位置信号と、平面検出手段とＸ線管の焦点位置間の設定距離とから、前記平面検出手段と前記Ｘ線管の焦点位置間の距離を前記設定距離に合致させるよう前記Ｘ線管上下駆動部を駆動制御する駆動制御手段を設けたことを特徴とするＸ線撮影装置。 An X-ray tube suspension device having an X-ray tube vertical drive unit that suspends the X-ray tube at the top and drives it up and down, and an imaging table that is installed at the bottom of the X-ray tube and carries a subject An X-ray imaging apparatus having an X-ray imaging table apparatus and having a plane detection means installed at different height positions depending on the imaging technique.
X-ray tube position detection means for detecting and outputting the height position of the X-ray tube relative to the installation position of any one of the plane detection means as a reference position, and inputting the imaging method, and the imaging Setting condition input means for storing each installation height position of the plane detection means with respect to the reference position for each technique, and outputting the installation height position signal corresponding to the inputted imaging technique, and the setting condition input From the installation height position signal from the means, the height position signal of the X-ray tube from the X-ray tube position detection means, and the set distance between the plane detection means and the focal position of the X-ray tube, the plane detection means An X-ray imaging apparatus comprising drive control means for driving and controlling the X-ray tube vertical drive unit so that the distance between the focal point of the X-ray tube matches the set distance.
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