JP2015062542A5

JP2015062542A5 -

Info

Publication number: JP2015062542A5
Application number: JP2013198119A
Authority: JP
Filing date: 2013-09-25
Publication date: 2016-10-13
Anticipated expiration: 2033-09-25

Description

X線高電圧発生装置から発生するノイズは、陽極駆動回路の動作を一時的に停止することにより低減することができる。引用文献1では、所定の条件下で自ら陽極駆動回路の動作を停止させることについて記載しているが、陽極駆動回路に不具合が発生した場合については特に配慮されていない。特に緊急を要する場合、陽極駆動回路の不具合により装置全体の動作を停止してしまうことは不都合となる。
Noise generated from the X-ray high voltage generator can be reduced by temporarily stopping the operation of the anode drive circuit. In cited document 1, it has been described for Rukoto stops the operation of its own anode drive circuit under certain conditions, is not particularly conscious about the case where trouble occurs in the anode driving circuit. In particular, when an emergency is required, it is inconvenient to stop the operation of the entire apparatus due to a defect in the anode drive circuit.

表示部110は、画像処理部108から出力されたX線画像データを被検体102のX線画像として表示する。
The display unit 110 displays the X-ray image data output from the image processing unit 108 as an X-ray image of the subject 102.

図6は、X線管211の内部構成の一部を図示したものである。回転陽極213は陰極215と対向する向きを軸601として回転する構造となっており、円盤部602と、これを支持する支持部603と、を有している。支持部603は固定子コイル214によって回転動作が行われ、これに伴い円盤部602が軸601を回転軸とし回転する。
FIG. 6 illustrates a part of the internal configuration of the X-ray tube 211. Rotary anode 213 has a structure for rotating the direction opposite to the cathode 215 as an axis 601, and a disc portion 602, a support portion 603 for supporting it, the. The support portion 603 is rotated by the stator coil 214, and the disk portion 602 rotates with the shaft 601 as a rotation axis.

判定回路209は計測した電流値が所定の範囲内にあるか否によりスタータ回路208が正常に動作しているかを判定する。判定回路209によってスタータ回路208が正常な動作を行なっていないと判定した場合、制御部111は、インバータ回路203等を用いてX線発生部104への電力供給、フィラメント回路207によるフィラメント212の加熱、及び、スタータ回路208による回転陽極213の回転、の停止を行ない、表示部110を用いて操作者にスタータ回路208の動作が異常であることを通知すると供に、X線条件設定部で設定できるX線条件の上限値を、回転陽極213が回転しなくても電子ビームでの発熱が装置構成上許容な範囲内となる値まで低減させる。

The determination circuit 209 determines whether the starter circuit 208 is operating normally based on whether or not the measured current value is within a predetermined range. When the determination circuit 209 determines that the starter circuit 208 is not operating normally, the control unit 111 supplies power to the X-ray generation unit 104 using the inverter circuit 203 or the like, and heats the filament 212 by the filament circuit 207. And the rotation of the rotary anode 213 by the starter circuit 208 is stopped, and the operator is notified that the operation of the starter circuit 208 is abnormal using the display unit 110, and is set in the X- ray condition setting unit. The upper limit value of the X-ray condition that can be generated is reduced to a value that allows the heat generation by the electron beam to be within an allowable range in the apparatus configuration even if the rotating anode 213 does not rotate.

Claims

An X-ray generator that irradiates the subject with X-rays, a high-voltage generator that supplies power to the X-ray generator, an X-ray detector that detects X-rays transmitted through the subject, and the X-rays An image processing unit that performs image processing on the X-ray signal output from the detection unit, a display unit that displays the X-ray image output from the image processing unit, and an X-ray condition irradiated from the X-ray generation unit An X-ray condition setting unit that sets the X-ray, and a control unit that controls the X-rays emitted from the X-ray generation unit based on the X-ray condition set by the X-ray condition setting unit,
The X-ray generator includes a cathode and a rotating anode that is disposed opposite to the cathode and rotates about the facing direction as an axis, and the high voltage generator is a starter circuit for rotating the rotating anode And a determination circuit that determines whether or not the starter circuit is operating normally. When the determination circuit determines that there is an abnormality in the starter circuit, the control unit uses the X-ray condition setting unit. An X-ray fluoroscopic apparatus characterized in that a restriction is provided for settable X-ray conditions.

The X-ray condition is a condition for acquiring the X-ray image by fluoroscopy or radiography, and is at least one of a tube voltage or a tube current supplied to the X-ray generator in the fluoroscopy or radiography. The X-ray fluoroscopic apparatus according to claim 1, wherein:

The said control part restrict | limits the upper limit of at least one of the said tube voltage or the said tube current, when it determines with the said starter circuit having abnormality by the said determination circuit, X of Claim 2 characterized by the above-mentioned. A fluoroscopic imaging device.

The control unit is a case where the determination circuit determines that there is an abnormality in the starter circuit, and when the rotation number of the rotating anode has reached a predetermined value, the abnormality is determined. The X-ray fluoroscopic apparatus according to claim 1, wherein imaging is performed within a predetermined time.

Rotation start and the rotating anode which is operated by the operator, has a photographing switch for controlling the timing of shooting, the rotation of the rotary anode is started by the photographing switch, the rotation speed of the rotary anode in advance When it reaches a predetermined value,
When the determination circuit determines that there is an abnormality in the starter circuit, the control unit performs imaging using the imaging switch only within a predetermined time period from when the abnormality is determined. The X-ray fluoroscopic apparatus according to any one of claims 1 to 3.

6. The control unit according to claim 5, wherein when the determination circuit determines that there is an abnormality in the starter circuit, the control unit notifies the operator of a time during which shooting by the shooting switch can be performed. The X-ray fluoroscopic apparatus described.