| 摘要 |
<p>A multi-energy type X-ray CT device which can reduce exposure of X-ray to a subject during the time the tube voltage is switched. The X-ray CT device includes an X-ray tube (1) for irradiating a subject put on a bed with an X-ray beam, a detector (3) arranged oppositely to the X-ray tube (1) for detecting X-ray that transmits through the subject, a DAS (10) for acquiring the X-ray transmission data of the subject with the detector (3) by irradiating the subject with the X-ray beam while rotating the X-ray tube (1) and the detector (3) about the body axis of the subject in the circumferential direction, a reconstruction arithmetic operation unit (11) for reconstructing a tomogram from the X-ray transmission data of the subject thus acquired, an X-ray controller (6) for switching the voltage applied to the X-ray tube (1) while the data is acquired by the DAS (10), an X-ray filter (2) arranged between the X-ray tube (1) and the subject for altering the energy of the X-ray beam for which the voltage applied to the X-ray tube (1) is switched by the X-ray controller (6), and an X-ray filter controller (7) for driving the X-ray filter (2) while the data is acquired by the DAS (10).</p> |
