| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray detector capable of responding even if an image reading cycle, etc., changes arbitrarily by changing an offset image according to the image reading cycle, etc. SOLUTION: When acquiring a diagnostic image, the electric charges accumulated in a pixel capacity of each pixel 134 are read at a prescribed reading cycle under the control of a reading control part 17. The electric charges thus read are amplified by a prescribed gain at an integral amplifier 135, and outputted to a signal processing part 18 as a diagnostic image. A factor calculation part 180 calculates correction factors (a) and (b) based on a difference dt between a reading cycle for an offset image which is acquired in advance and the reading cycle when acquiring the diagnostic image, and a difference dg between a gain for the offset image which is acquired in advance and the gain when acquiring the diagnostic image. The factor (a) is integrated into the offset image while the factor (b) is added to the offset image. The offset image after addition is subtracted from the diagnostic image for offset correction. COPYRIGHT: (C)2004,JPO
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