X-RAY CT APPARATUS AND X-RAY TUBE DEVICE

To obtain higher output of an X-ray with a small focal size in a dual energy scan than before.SOLUTION: An X-ray CT apparatus according to an embodiment comprises an X-ray tube, an X-ray detector, a rotation unit, and a control unit. The X-ray tube comprises: a first cathode and a second cathode for...

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1. Verfasser: MIZUNO TAKENORI
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Sprache:eng ; jpn
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Zusammenfassung:To obtain higher output of an X-ray with a small focal size in a dual energy scan than before.SOLUTION: An X-ray CT apparatus according to an embodiment comprises an X-ray tube, an X-ray detector, a rotation unit, and a control unit. The X-ray tube comprises: a first cathode and a second cathode for radiating thermoelectrons; a toric anode that receives thermoelectrons to generate an X-ray, is provided over the whole circumference of a subject, and is rotatably held; and a drive unit for driving and rotating the anode. The X-ray detector detects an X-ray radiated from the X-ray tube. The rotation unit rotatably holds the X-ray tube and the X-ray detector. The control unit controls the first cathode and the second cathode to make the cathodes generate X-rays having different tube voltages.SELECTED DRAWING: Figure 4 【課題】デュアルエネルギースキャンにおいて、小さな焦点サイズで従来よりも高出力のX線を得ること。【解決手段】実施形態に係るX線CT装置は、X線管と、X線検出器と、回転部と、制御部とを備える。X線管は、熱電子を照射する第1の陰極及び第2の陰極と、熱電子を受けてX線を発生し、被検体の周囲全周に亘って設けられ、回転可能に保持される円環状の陽極と、陽極を回転駆動させる駆動部と、を備える。X線検出器は、X線管から照射されたX線を検出する。回転部は、X線管と、X線検出器とを回転可能に保持する。制御部は、第1の陰極と第2の陰極とを制御することで異なる管電圧のX線を発生させる。【選択図】 図4