| 摘要 |
PROBLEM TO BE SOLVED: To speed up processing when a blur weighting function (point spread function) is different depending on a cell of an X-ray detector. SOLUTION: A matrix (H) for the actual blur weighting function of the X-ray detector (24) is decomposed into a homogeneous component matrix (H0) and an inhomogeneous component matrix (H1). An inhomogeneous component main matrix (H1') eliminating a plurality of terms other than terms relating to a few cells of the X-ray detector which has a different blur weighting function from other out of the terms of the inhomogeneous component matrix (H1) is calculated. A crosstalk correction is performed by using the inhomogeneous component main matrix (H1') instead of the inhomogeneous component matrix (H1). According to this invention, the amount of calculation is reduced, and processing is sped up. COPYRIGHT: (C)2008,JPO&INPIT
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