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JPH07336597A - Fluoroscopic and radiographic device - Google Patents

Fluoroscopic and radiographic device

Info

Publication number
JPH07336597A
JPH07336597A JP6150604A JP15060494A JPH07336597A JP H07336597 A JPH07336597 A JP H07336597A JP 6150604 A JP6150604 A JP 6150604A JP 15060494 A JP15060494 A JP 15060494A JP H07336597 A JPH07336597 A JP H07336597A
Authority
JP
Japan
Prior art keywords
ray
image
tube voltage
time
fluoroscopic
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.)
Pending
Application number
JP6150604A
Other languages
Japanese (ja)
Inventor
Akira Hisayoshi
明 久芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Medical Corp filed Critical Hitachi Medical Corp
Priority to JP6150604A priority Critical patent/JPH07336597A/en
Publication of JPH07336597A publication Critical patent/JPH07336597A/en
Pending legal-status Critical Current

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  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

PURPOSE:To control fluoroscopic conditions and radiographic conditions at the time of X-raying and to obtain a stable operation through easy adjustment by using a video signal for an X-ray television camera to observe an X-ray image. CONSTITUTION:In the case of X-raying, an X-ray emitted from an X-ray tube 1 is projected onto an object 3 via a variable aperture and the X-ray is converted into a visual image by an image intensifier after transmitting through the object 3 and the visual ray is made incident onto an X-ray TV device 8. The device 8 converts the visual image into an electric signal and it is fed to a luminance signal output circuit 10. The circuit 10 extracts selectively corresponding to the center of the visual ray and gives the signal to a preamplifier 14 of an automatic exposure controller 11. The controller 11 compares the output of the amplifier 14 with an X-ray image luminance reference signal stored in advance in an EEPROM 24 on a bus line of a CPU 21 and when the luminance of the X-ray image is too high, the X-ray condition is lowered and when too low, the X-ray condition is raised and when the luminance is within a proper range, the X-ray condition is maintained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、自動露出装置を用いて
透視時のX線条件及び撮影時のX線条件を決定するにあ
たり、透視時にはX線テレビ装置の出力電気信号を利用
して透視X線条件を適性に保ち、撮影時には透視時に適
性に決められた透視X線条件から、受像目的にあった撮
影X線条件を決定するようにしたX線透視撮影装置に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an automatic exposure device to determine an X-ray condition during fluoroscopy and an X-ray condition during radiography, and at the time of fluoroscopy, an electric signal output from an X-ray television device is used for fluoroscopy. The present invention relates to an X-ray fluoroscopic imaging apparatus which maintains an appropriate X-ray condition, and determines an imaging X-ray condition suitable for an image receiving purpose from the fluoroscopic X-ray condition appropriately determined during fluoroscopy during imaging.

【0002】[0002]

【従来の技術】従来のX線透視装置では、透視時及び撮
影時のX線条件を以下のようにして決定している。すな
わち、透視時には、イメージインテンシファイヤの出力
である可視光像を受けるフォトマルチプライヤ等の受光
素子の出力、あるいは、X線テレビ装置の出力映像信号
の全部または一部を電気信号に変換して自動露出制御装
置に入力し、自動露出制御装置で、この受光素子の出力
あるいは電気信号の強度に応じてX線の強度を決定し、
X線強度決定信号をX線高電圧装置に送って透視X線条
件を適性に保つようにしている。また、撮影時には、透
視時に用いたX線センサあるいは撮影時のフォトタイマ
専用に設けたX線センサにより、被写体透過後のX線強
度を検出してこれを電気信号に変換し、このX線強度に
比例した電気信号を積分器で積分して、積分値が所定の
値になった時にX線高電圧装置に撮影終了指令を出し
て、適正な量のX線を被写体に照射するようにしてい
る。
2. Description of the Related Art In a conventional X-ray fluoroscopic apparatus, X-ray conditions during fluoroscopy and radiography are determined as follows. That is, during fluoroscopy, the output of a light receiving element such as a photomultiplier that receives a visible light image that is the output of the image intensifier, or the whole or part of the output video signal of the X-ray television device is converted into an electrical signal. Input to the automatic exposure control device, and the automatic exposure control device determines the intensity of the X-ray according to the output of this light receiving element or the intensity of the electric signal,
The X-ray intensity determination signal is sent to the X-ray high voltage device so that the fluoroscopic X-ray condition is kept proper. During photographing, the X-ray sensor used during fluoroscopy or the X-ray sensor provided exclusively for the photo timer during photographing detects the X-ray intensity after passing through the subject and converts it into an electrical signal. The electric signal proportional to is integrated by an integrator, and when the integrated value reaches a predetermined value, an X-ray high voltage device is instructed to end the imaging so that an appropriate amount of X-rays is irradiated onto the subject. There is.

【0003】[0003]

【発明が解決しようとする課題】X線透視撮影を行う際
には、透視時と撮影時とで被写体の状況がちがっていた
り、あるいはX線照射野に差があったりする場合に、透
視時に決定したX線条件と撮影時の適正なX線条件との
間に誤差が生じることがある。また、X線高電圧装置の
精度によっても、更には、撮影の管電圧、管電流(m
A)、撮影時間(s)などを連続的に設定できないこと
などによってもこのような誤差が生じる。上述した従来
のX線透視撮影装置では、透視時のX線条件と、撮影時
のX線条件を別個に設定するようにしているため、この
ような誤差を補正することができるという利点がある。
When X-ray fluoroscopy is performed, when the situation of the subject is different between the fluoroscopy and the radiography, or there is a difference in the X-ray irradiation field, the fluoroscopy is performed. An error may occur between the determined X-ray condition and the appropriate X-ray condition at the time of imaging. Further, depending on the accuracy of the X-ray high voltage apparatus, the tube voltage and tube current (m
Such errors also occur due to the fact that A), the photographing time (s), etc. cannot be continuously set. In the above-mentioned conventional X-ray fluoroscopic imaging apparatus, since the X-ray condition at the time of fluoroscopy and the X-ray condition at the time of imaging are set separately, there is an advantage that such an error can be corrected. .

【0004】しかし、一方では、透視時には被写体を観
察するための絞り等を利用して適正なX線条件を設定す
ることができても、撮影時には、フォトタイマの動作が
不安定になってしまい、撮影時のX線条件が適性に設定
できなくなることがあるという問題点があった。この問
題は、撮影時には通常フィルムサイズまでX線照射野を
広げるため、透視時にはX線センサに影響を与えなかっ
た被写体側面からの直接線の影響を受けるなどの理由か
ら生じるものである。また、撮影像を記録するフィルム
などの受像器と、X線センサとの間でX線エネルギー依
存特性に差がある場合や、フィルムなどの受像器に入射
するX線の量や質と、X線センサに入射するX線センサ
に入射するX線の量や質に差がある場合などに、フォト
タイマの動作点が適性値からずれてしまい、適正なフィ
ルム濃度が得られなくなるという問題点もある。
On the other hand, on the other hand, even if an appropriate X-ray condition can be set by utilizing a diaphragm or the like for observing a subject during fluoroscopy, the operation of the photo timer becomes unstable during photographing. However, there is a problem that the X-ray condition at the time of photographing may not be set appropriately. This problem occurs because the X-ray irradiation field is normally expanded to the film size during photographing, and the X-ray sensor is affected by direct rays from the side surface of the subject that did not affect the X-ray sensor during fluoroscopy. Further, when there is a difference in the X-ray energy dependence characteristic between the X-ray sensor and an image receiver such as a film for recording a captured image, and the amount and quality of X-rays incident on the image receiver such as a film, X-ray incident on the X-ray sensor When the amount and quality of X-rays incident on the X-ray sensor are different, the operating point of the phototimer deviates from the appropriate value, and an appropriate film density cannot be obtained. is there.

【0005】更に、X線制御装置でこれらの問題点を補
正しようとするために、調整に時間がかかり、制御装置
の回路構成が複雑になってX線透視撮影装置全体のコス
トが高くなってしまうといった問題もある。
Further, since the X-ray controller attempts to correct these problems, the adjustment takes time, the circuit configuration of the controller becomes complicated, and the cost of the entire X-ray fluoroscopic apparatus increases. There is also the problem of being lost.

【0006】本発明の目的は、上記のような従来技術の
問題点を解決し、回路構成が簡単で、調整が容易であ
り、しかも安定して動作する自動露出制御装置を備える
X線透視撮影装置を安価に提供することにある。
An object of the present invention is to solve the above-mentioned problems of the prior art, have a simple circuit configuration, are easy to adjust, and are equipped with an automatic exposure control apparatus that operates stably. It is to provide the device at low cost.

【0007】[0007]

【課題を解決するための手段】上記目的は、X線を発生
するX線管装置と、被写体透過後のX線像を記録する映
像記録手段と、被写体を透過したX線の強度分布を光学
像に変換するイメージインテンシファイヤと、この光学
像を電気信号に変換するX線テレビ装置と、前記X線管
装置に加える高電圧を発生する高電圧発生装置と、前記
X線管装置で発生するX線条件を決定するX線制御装置
と、被写体に照射するX線量を調節する自動露出制御装
置とを備えるX線透視撮影装置において、前記自動露出
制御装置の動作を制御するCPUに接続したメモリに、
透視時のX線管電圧から撮影時のX線管電圧を決定する
対応表と、撮影時のX線管電圧の関数としての管電流時
間積とを記憶させておき、透視時に、前記イメージイン
テンシファイヤの出力の全部又は一部を前記X線テレビ
装置を介して前記自動露出制御装置に入力して、前記自
動露出制御装置において前記X線テレビ装置の出力電気
信号の強度に応じて透視X線管電圧を決定し、撮影時に
は、前記メモリに記憶させた対応表に基づいて、前記透
視X線管電圧に対応する撮影X線管電圧を決定し、ま
た、このようにして決定した撮影X線管電圧に対応する
管電流時間積の値を、前記メモリに記憶させた撮影時の
X線管電圧の関数としての管電流時間積の値に基づいて
補間計算を行って決定する手段を設けることにより達成
される。
The above objects are to provide an X-ray tube device for generating X-rays, a video recording means for recording an X-ray image after passing through an object, and an optical intensity distribution of the X-rays passing through the object. An image intensifier for converting into an image, an X-ray television device for converting this optical image into an electric signal, a high voltage generator for generating a high voltage applied to the X-ray tube device, and an X-ray tube device. In an X-ray fluoroscopic imaging apparatus including an X-ray control device that determines the X-ray condition to be controlled and an automatic exposure control device that adjusts the X-ray dose applied to a subject, the device is connected to a CPU that controls the operation of the automatic exposure control device. In memory,
A correspondence table for determining the X-ray tube voltage at the time of imaging from the X-ray tube voltage at the time of fluoroscopy and the tube current time product as a function of the X-ray tube voltage at the time of imaging are stored, and the image All or part of the output of the tensiger is input to the automatic exposure control device via the X-ray television device, and the fluoroscopy X-ray is transmitted in the automatic exposure control device according to the intensity of the output electric signal of the X-ray television device. The X-ray tube voltage is determined, and at the time of shooting, the X-ray tube voltage corresponding to the fluoroscopic X-ray tube voltage is determined based on the correspondence table stored in the memory. Means are provided for determining the value of the tube current time product corresponding to the tube voltage by performing an interpolation calculation based on the value of the tube current time product as a function of the X-ray tube voltage at the time of imaging stored in the memory. It is achieved by

【0008】[0008]

【作用】本発明にかかるX線透視撮影装置によれば、透
視時には、X線テレビ装置の出力映像信号を電気信号に
変換してこれを自動露出制御装置に入力し、自動露出制
御装置ではこの電気信号の強度を一定に保つようにX線
強度決定信号をX線高電圧装置に送ることによって、被
写体の状況に応じた適正な透視X線条件で透視を行うこ
とができる。また、撮影時には、このようにして透視時
に決定した透視X線条件から間接的に被写体の厚さを検
出して撮影時のX線条件を決定するようにする。すなわ
ち、自動露出制御装置の動作を制御するCPUに接続さ
れているメモリに、透視時の管電圧から撮影時の管電圧
を決定する対応表と、撮影時の管電圧の関数としての管
電流時間積の値を予め記憶させておき、CPUは、撮影
時にこの対応表に基づいて、透視時に決定した透視管電
圧から撮影時の撮影管電圧を決定し、また、このように
して決定した撮影管電圧と、メモリに記憶させてある撮
影時の管電圧の関数としての管電流時間積の値との間で
補間計算を行い、決定した撮影管電圧に応じた管電流時
間積の値を決定する。本発明のX線透視撮影装置の自動
露出制御装置では、このようにして撮影管電圧と管電流
時間積の値を決定してX線強度決定信号をX線制御装置
に出力し、受像目的にあったX線量を得るようにする。
According to the X-ray fluoroscopic imaging apparatus of the present invention, during fluoroscopy, the output video signal of the X-ray television apparatus is converted into an electric signal and input to the automatic exposure control apparatus. By transmitting the X-ray intensity determination signal to the X-ray high voltage device so as to keep the intensity of the electric signal constant, it is possible to perform fluoroscopy under appropriate fluoroscopic X-ray conditions according to the situation of the subject. Further, at the time of photographing, the X-ray condition at the time of photographing is determined by indirectly detecting the thickness of the subject from the fluoroscopic X-ray condition thus determined at the time of fluoroscopy. That is, a correspondence table for determining a tube voltage at the time of photographing from a tube voltage at the time of fluoroscopic observation, and a tube current time as a function of the tube voltage at the time of photographing are stored in a memory connected to a CPU for controlling the operation of the automatic exposure control device. The value of the product is stored in advance, and the CPU determines the photographing tube voltage at the time of photographing from the fluoroscopic tube voltage decided at the time of photographing, based on this correspondence table at the time of photographing, and the photographing tube thus decided. An interpolating calculation is performed between the voltage and the value of the tube current time product as a function of the tube voltage at the time of shooting, which is stored in the memory, and the value of the tube current time product corresponding to the determined shooting tube voltage is determined. . In the automatic exposure control device of the X-ray fluoroscopic imaging apparatus of the present invention, the value of the imaging tube voltage and the tube current time product is thus determined, and the X-ray intensity determination signal is output to the X-ray control apparatus for the purpose of image reception. Try to get the exact X-ray dose.

【0009】[0009]

【実施例】以下に、図1及び図2に基づいて、本発明の
X線透視撮影装置の一実施例を説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the X-ray fluoroscopic imaging apparatus of the present invention will be described below with reference to FIGS.

【0010】図1は、本発明のX線透視撮影装置の全体
の構成を示すブロック図である。図1に示すとおり、本
発明のX線透視撮影装置は、X線を発生するX線管装置
1、可動絞り2、被写体3を載置するテーブル4、X線
受像フィルム5、このフィルム5を保持するフイルムホ
ルダ6、被写体3を透過した後のX線を可視光像に変換
するイメージインテンシファイヤ7、イメージインテン
シファイヤ7の出力を電気信号に変換するX線テレビ装
置8、ディストリビュータ9、輝度信号出力回路10、
自動露出制御装置11、X線制御装置12、X線高電圧
発生装置13を備えている。自動露出制御装置11は、
プリアンプ14、F−kV(透視管電圧)設定回路1
5、R−kV(撮影管電圧)設定回路16、R−Tim
e(撮影時間)設定回路17とを備え、X線制御装置1
2はkV(管電圧)調整機構18とスイッチ手段19と
を備える。
FIG. 1 is a block diagram showing the overall construction of an X-ray fluoroscopic apparatus according to the present invention. As shown in FIG. 1, the X-ray fluoroscopic imaging apparatus of the present invention includes an X-ray tube device 1 for generating X-rays, a movable diaphragm 2, a table 4 on which an object 3 is placed, an X-ray image receiving film 5, and this film 5. A film holder 6 for holding, an image intensifier 7 for converting X-rays transmitted through the subject 3 into a visible light image, an X-ray television device 8 for converting an output of the image intensifier 7 into an electric signal, a distributor 9, Luminance signal output circuit 10,
An automatic exposure controller 11, an X-ray controller 12, and an X-ray high voltage generator 13 are provided. The automatic exposure control device 11
Preamplifier 14, F-kV (fluoroscope voltage) setting circuit 1
5, R-kV (shooting tube voltage) setting circuit 16, R-Tim
e (imaging time) setting circuit 17 and the X-ray controller 1
2 includes a kV (tube voltage) adjusting mechanism 18 and a switch means 19.

【0011】図2は、自動露出制御装置11の動作を制
御する制御機構の構成を示す図である。なお、本実施例
では、自動露出制御装置11とX線制御装置12とを1
つのCPU21で制御するようにしている。CPU21
のバスラインに、プログラムを格納するROM22、計
算などの作業領域として使用するRAM23、据付けデ
ータを格納するEEPROM24、IOポート、A/D
変換器25等が接続されている。EEPROM24に
は、透視時の管電圧から撮影時の管電圧を決定する対応
表と、撮影時の管電圧の関数としての管電流時間積の値
とを予め記憶させておく。
FIG. 2 is a diagram showing the structure of a control mechanism for controlling the operation of the automatic exposure control device 11. In this embodiment, the automatic exposure control device 11 and the X-ray control device 12 are combined into one unit.
It is controlled by two CPUs 21. CPU21
In the bus line of, ROM22 for storing programs, RAM23 used as a work area for calculation, EEPROM24 for storing installation data, IO port, A / D
The converter 25 and the like are connected. The EEPROM 24 stores in advance a correspondence table for determining the tube voltage at the time of photographing from the tube voltage at the time of fluoroscopy and the value of the tube current-time product as a function of the tube voltage at the time of photographing.

【0012】透視時には、X線管装置1から放射された
X線が、可視絞り2を介して被写体3に投射され、被写
体3を透過後、イメージインテンシファイヤ7で可視光
像に変換され、さらにこの可視光像がX線テレビ装置8
に入射する。X線テレビ装置8で、この可視光像を電気
信号に変換して輝度信号出力回路10に電気信号を送
る。輝度信号出力回路10では、可視光像の中心部分に
相当する部分の電気信号を選択的に取り出して、自動露
出制御装置11のプリアンプ14に入力する。
During fluoroscopy, X-rays emitted from the X-ray tube device 1 are projected onto a subject 3 through a visible diaphragm 2, transmitted through the subject 3, and then converted into a visible light image by an image intensifier 7. Further, this visible light image is displayed on the X-ray television device 8.
Incident on. The X-ray television device 8 converts the visible light image into an electric signal and sends the electric signal to the luminance signal output circuit 10. The luminance signal output circuit 10 selectively extracts the electric signal of the portion corresponding to the central portion of the visible light image and inputs it to the preamplifier 14 of the automatic exposure control device 11.

【0013】自動露出制御装置11では、プリアンプ1
4の出力をCPU21のバスライン上にあるEEPRO
M24に予め記憶させてある透視画像輝度基準信号と比
較して、透視画像の輝度が高過ぎればX線条件を下げ、
低過ぎればX線条件を上げ、適性範囲内であればそのX
線条件を維持するようにして透視X線条件決定信号を決
定し、この信号をX線高電圧発生装置19に送って透視
管電圧を決定し、透視画像の輝度を適性に保つようにす
る。このような制御をおこなうことによって決定された
透視X線条件は、結果として、被写体3のX線の吸収の
大きさを反映したものとなり、この透視X線条件から、
撮影時に必要なX線の量を求めることができる。
In the automatic exposure control device 11, the preamplifier 1
The output of 4 is EEPRO on the bus line of CPU21.
Compared with the fluoroscopic image brightness reference signal stored in advance in M24, if the fluoroscopic image brightness is too high, lower the X-ray condition,
If it is too low, increase the X-ray condition, and if it is within the appropriate range, the X
The fluoroscopic X-ray condition determination signal is determined so as to maintain the line condition, and this signal is sent to the X-ray high voltage generator 19 to determine the fluoroscopic tube voltage, so that the brightness of the fluoroscopic image is kept appropriate. As a result, the fluoroscopic X-ray condition determined by performing such control reflects the magnitude of X-ray absorption of the subject 3, and from this fluoroscopic X-ray condition,
The amount of X-rays required at the time of shooting can be calculated.

【0014】撮影時のX線条件は以下の手順によって決
定する。まず、EEPROM24に記憶させてある対応
表から、透視管電圧(F−kV)が70kVの時の撮影
管電圧RkV1と、透視管電圧が100kvの時の撮影
管電圧RkV2とを算出し、線形補間計算を行って、上
記決定した透視管電圧に対する撮影管電圧を決定する。
次いで、EEPROM24に記憶させてある撮影管電圧
の関数としての管電流時間積の値から、撮影管電圧(R
−kV)が60kV、80kv、100kv、120k
Vの時のそれぞれの管電流時間積の値を求め、線形補間
計算を行って、上記決定された撮影管電圧に応じた管電
流時間積の値を決定し、適正フィルム濃度を与えるよう
にする。
The X-ray condition at the time of photographing is determined by the following procedure. First, from the correspondence table stored in the EEPROM 24, the tube voltage RkV1 when the tube voltage (F-kV) is 70 kV and the tube voltage RkV2 when the tube voltage is 100 kv are calculated and linearly interpolated. A calculation is performed to determine the tube voltage for the fluoroscopic tube voltage determined above.
Then, from the value of the tube current time product as a function of the tube voltage stored in the EEPROM 24, the tube voltage (R
-KV) is 60 kV, 80 kv, 100 kv, 120 k
The value of each tube current time product at V is obtained, and the linear interpolation calculation is performed to determine the value of the tube current time product according to the above determined tube voltage, so as to give an appropriate film density. .

【0015】図3は、透視管電圧(F−kV)から撮影
管電圧(R−kV)を決定する際の関係式を表すグラ
フ、また、図4は、決定した撮影管電圧(R−kV)か
ら管電流時間積の値(mAs)を決定する際の関係式を
表すグラフである。実際に撮影を行う時には、上述した
ように透視時に決定した撮影管電圧で撮影を行う。ま
た、管電流時間積については、使用するX線管装置の許
容負荷以下で、X線高電圧装置で選択可能な値の管電流
を選択するとともに、被写体の状況から撮影時間が長過
ぎたり短過ぎたりしないように撮影時間を選択するよう
にする。
FIG. 3 is a graph showing a relational expression when determining the photographing tube voltage (R-kV) from the fluoroscopic tube voltage (F-kV), and FIG. 4 is the decided photographing tube voltage (R-kV). ) Is a graph showing a relational expression when the value (mAs) of the tube current time product is determined from FIG. When actually photographing, photographing is performed with the photographing tube voltage determined during fluoroscopy as described above. Regarding the tube current-time product, a tube current of a value that can be selected by the X-ray high-voltage device is selected below the allowable load of the X-ray tube device to be used, and the shooting time is too long or too short depending on the condition of the subject. Make sure to select the shooting time so that it does not pass.

【0016】このように、本発明のX線透視撮影装置に
おいては、撮影時のX線量は、透視時に決定した撮影管
電圧で完全に決定され、撮影中のイメージインテンシフ
ァイヤの出力などの影響は一切受けることなく決まるこ
とになる。
As described above, in the X-ray fluoroscopic imaging apparatus of the present invention, the X-ray dose at the time of imaging is completely determined by the imaging tube voltage determined at the time of fluoroscopy, and is influenced by the output of the image intensifier during imaging. Will be decided without receiving any.

【0017】なお、ここでは、EEPROM24に記憶
させておく、透視管電圧と撮影管電圧との換算値と、撮
影管電圧の関数としての値であり、適正フィルム濃度を
与える管電流時間積の値は撮影の目的に応じて適宜変更
してもよい。また、補間計算が線形であるか否か、必要
な管電流時間積を得るために管電流と撮影時間とを分解
して制御するか否か、撮影管電圧に対応し、適正フィル
ム濃度を与える値である管電流時間積の値を、複数の値
から操作者が適宜選択できるようにするか否かなども、
撮影の目的に応じて決定するようにしてもよい。またこ
れらの条件を適宜組合わせるようにしてもよい。
In this case, the value of the tube current time product which gives the appropriate film density is a value which is stored in the EEPROM 24 and which is a function of the conversion value of the fluoroscopy tube voltage and the shooting tube voltage and the shooting tube voltage. May be changed according to the purpose of photographing. Also, whether the interpolation calculation is linear, whether the tube current and shooting time are decomposed and controlled in order to obtain the required tube current time product, corresponding to the shooting tube voltage, and an appropriate film density is given. Whether or not the operator can appropriately select the value of the tube current time product, which is the value, from multiple values,
You may make it determine according to the objective of photography. Further, these conditions may be combined appropriately.

【0018】[0018]

【発明の効果】以上説明したように本発明のX線透視撮
影装置によれば、透視画像を観察するためのX線テレビ
カメラの映像信号だけで、透視時に、透視X線条件と撮
影X線条件とを制御することが可能となるという効果が
ある。また、X線透視撮影装置の自動露出制御装置が、
簡単な回路構成で、調整が容易になり、安定した動作を
得ることができるようになるという効果がある。
As described above, according to the X-ray fluoroscopic imaging apparatus of the present invention, the fluoroscopic X-ray condition and the radiographic X-ray are used at the time of fluoroscopy only by the video signal of the X-ray television camera for observing the fluoroscopic image. It is possible to control the condition and. In addition, the automatic exposure control device of the X-ray fluoroscopy apparatus,
With a simple circuit configuration, there is an effect that adjustment becomes easy and stable operation can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明装置の一実施例の構成を示すブロック図
である。
FIG. 1 is a block diagram showing a configuration of an embodiment of a device of the present invention.

【図2】本発明装置の、主制御CPUの周辺回路の構成
を示すブロック図である。
FIG. 2 is a block diagram showing a configuration of a peripheral circuit of a main control CPU of the device of the present invention.

【図3】透視管電圧から撮影管電圧を決定する関係式を
示すグラフである。
FIG. 3 is a graph showing a relational expression for determining a photographing tube voltage from a see-through tube voltage.

【図4】撮影管電圧から管電流時間積を求める際の関係
式を示すグラフである。
FIG. 4 is a graph showing a relational expression when a tube current time product is obtained from an imaging tube voltage.

【符号の説明】[Explanation of symbols]

1 X線管装置 2 可動絞り 3 被写体 4 被写体テーブル 5 フィルム 6 フィルムホルダ 7 イメージインテンシファイヤ 8 X線テレビ装置 9 ディストリビュータ 10 輝度信号出力回路 11 自動露出制御装置 12 X線制御装置 13 高電圧発生装置 14 プリアンプ 15 F−kV設定回路 16 R−kV設定回路 17 R−TIME設定回路 18 kV調整機構 19 スイッチ 21 CPU 22 ROM 23 RAM 24 EEPROM 25 A/D変換器 1 X-ray tube device 2 Movable diaphragm 3 Subject 4 Subject table 5 Film 6 Film holder 7 Image intensifier 8 X-ray TV device 9 Distributor 10 Luminance signal output circuit 11 Automatic exposure controller 12 X-ray controller 13 High voltage generator 14 preamplifier 15 F-kV setting circuit 16 R-kV setting circuit 17 R-TIME setting circuit 18 kV adjusting mechanism 19 switch 21 CPU 22 ROM 23 RAM 24 EEPROM 25 A / D converter

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】X線を発生するX線管装置と、被写体透過
後のX線像を記録する映像記録手段と、被写体を透過し
たX線の強度分布を光学像に変換するイメージインテン
シファイヤと、この光学像を電気信号に変換するX線テ
レビ装置と、前記X線管装置に加える高電圧を発生する
高電圧発生装置と、前記X線管装置で発生するX線条件
を決定するX線制御装置と、被写体に照射するX線量を
調節する自動露出制御装置とを備えるX線透視撮影装置
において、 前記自動露出制御装置の動作を制御するCPUに接続し
たメモリに、透視時のX線管電圧から撮影時のX線管電
圧を決定する対応表と、撮影時のX線管電圧の関数とし
ての管電流時間積とを記憶させておき、 透視時に、前記イメージインテンシファイヤの出力の全
部又は一部を前記X線テレビ装置を介して前記自動露出
制御装置に入力して、前記自動露出制御装置において前
記X線テレビ装置の出力電気信号の強度に応じて透視X
線管電圧を決定し、 撮影時には、前記メモリに記憶させた対応表に基づい
て、前記透視X線管電圧に対応する撮影X線管電圧を決
定し、また、このようにして決定した撮影X線管電圧に
対応する管電流時間積の値を、前記メモリに記憶させた
撮影時のX線管電圧の関数としての管電流時間積の値に
基づいて補間計算を行って決定する手段を具備すること
を特徴とするX線透視撮影装置。
1. An X-ray tube device for generating X-rays, a video recording means for recording an X-ray image after passing through a subject, and an image intensifier for converting an intensity distribution of the X-rays passing through the subject into an optical image. An X-ray television device for converting the optical image into an electric signal, a high voltage generator for generating a high voltage applied to the X-ray tube device, and an X-ray condition determining X-ray condition generated by the X-ray tube device. In an X-ray fluoroscopic imaging apparatus including a line control device and an automatic exposure control device that adjusts the X-ray dose for irradiating a subject, an X-ray during fluoroscopy is stored in a memory connected to a CPU that controls the operation of the automatic exposure control device. The correspondence table for determining the X-ray tube voltage at the time of imaging from the tube voltage and the tube current time product as a function of the X-ray tube voltage at the time of imaging are stored, and the output of the image intensifier of the image intensifier at the time of fluoroscopy is stored. All or part of the above X Enter the automatic exposure control device via the television apparatus, according to the intensity of the output electrical signal of the X-ray television apparatus in the automatic exposure control device fluoroscopic X
The X-ray tube voltage is determined, and at the time of shooting, the X-ray tube voltage corresponding to the fluoroscopic X-ray tube voltage is determined based on the correspondence table stored in the memory. A means for determining the value of the tube current time product corresponding to the tube voltage by performing an interpolation calculation based on the value of the tube current time product stored in the memory as a function of the X-ray tube voltage at the time of photographing. An X-ray fluoroscopic imaging apparatus characterized by:
JP6150604A 1994-06-09 1994-06-09 Fluoroscopic and radiographic device Pending JPH07336597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6150604A JPH07336597A (en) 1994-06-09 1994-06-09 Fluoroscopic and radiographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6150604A JPH07336597A (en) 1994-06-09 1994-06-09 Fluoroscopic and radiographic device

Publications (1)

Publication Number Publication Date
JPH07336597A true JPH07336597A (en) 1995-12-22

Family

ID=15500522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6150604A Pending JPH07336597A (en) 1994-06-09 1994-06-09 Fluoroscopic and radiographic device

Country Status (1)

Country Link
JP (1) JPH07336597A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000261724A (en) * 1999-03-10 2000-09-22 Toshiba Corp X-ray device and photographing condition setting method
JP2003235835A (en) * 2002-02-15 2003-08-26 Toshiba Corp X-ray diagnostic system
JP2005169068A (en) * 2003-11-20 2005-06-30 Canon Inc Radiation image pick-up device, radiation image pick-up method, and radiation image pick-up system
JP2006312040A (en) * 2005-05-03 2006-11-16 General Electric Co <Ge> Method and system for controlling exposure for medical imaging device
JP2011147615A (en) * 2010-01-21 2011-08-04 Toshiba Corp X-ray fluoroscopic apparatus
JP6125126B1 (en) * 2017-01-18 2017-05-10 典人 畠山 X-ray imaging condition correction method, program, and X-ray system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000261724A (en) * 1999-03-10 2000-09-22 Toshiba Corp X-ray device and photographing condition setting method
JP2003235835A (en) * 2002-02-15 2003-08-26 Toshiba Corp X-ray diagnostic system
JP2005169068A (en) * 2003-11-20 2005-06-30 Canon Inc Radiation image pick-up device, radiation image pick-up method, and radiation image pick-up system
JP4533010B2 (en) * 2003-11-20 2010-08-25 キヤノン株式会社 Radiation imaging apparatus, radiation imaging method, and radiation imaging system
JP2006312040A (en) * 2005-05-03 2006-11-16 General Electric Co <Ge> Method and system for controlling exposure for medical imaging device
JP2011147615A (en) * 2010-01-21 2011-08-04 Toshiba Corp X-ray fluoroscopic apparatus
JP6125126B1 (en) * 2017-01-18 2017-05-10 典人 畠山 X-ray imaging condition correction method, program, and X-ray system
JP2018114123A (en) * 2017-01-18 2018-07-26 典人 畠山 X-ray imaging condition correction method, program and x-ray system
US10610188B2 (en) 2017-01-18 2020-04-07 Norihito HATAKEYAMA X-ray imaging condition modification method and x-ray system

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