| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus capable of eliminating the influence of a scattered ray by a simple method without lowering the S/N of images. SOLUTION: A scan control part 60 divides one view period into two periods, changes the tube current values of X-ray tubes 12 and 22 for each period, makes the tube current values of the X-ray tubes 12 and 22 be respectively different values in the same period and makes the X-ray tubes 12 and 22 emit X-rays. An X-ray dose calculation part 52 obtains the X-ray dose of penetrated rays emitted from the X-ray tube 12 to be a pair, penetrated through a subject and detected by an X-ray detector on the basis of the X-ray dose actually detected by the X-ray detector 13 during the one view period, and similarly obtains the X-ray dose of the penetrated rays emitted from the X-ray tube 22 to be a pair, penetrated through the subject and detected by the X-ray detector 23 on the basis of the X-ray dose actually detected by the X-ray detector 23. COPYRIGHT: (C)2009,JPO&INPIT
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