| 摘要 |
PROBLEM TO BE SOLVED: To realize an appropriate X-ray measurement according to the physique of a subject. SOLUTION: X-rays 11 of two types of energies, high energy X-rays and low energy X-rays, are used for a DXA (Dual X-ray Absorptiometry) method. A control section 20 controls a ratio of generation times between the high energy X-rays and the low energy X-rays, which are alternately and repeatedly generated by an X-ray generator 10, according to the physique of the subject 30. The control section 20, for example, alternately generates the high energy X-rays and the low energy X-rays by changing a tube voltage of an X-ray generation tube provided in the X-ray generator 10 to so as to control the ratio (tube voltage duty ratio) between the high energy X-rays and the low energy X-rays. COPYRIGHT: (C)2009,JPO&INPIT
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