| 摘要 |
PROBLEM TO BE SOLVED: To improve the comparative image reading performance as to two or more images of the same subject as an object of comparative image reading. SOLUTION: An energy subtraction image generating means (image acquiring means attaching importance to structure) 11 obtains energy subtraction images for every group according to original images for energy subtraction, a corresponding position relation computing means 12 finds structural corresponding positional relation among the groups as to the obtained energy subtraction images, and an aligning means 13 aligns the original image for energy subtraction between the groups according to the structural corresponding positional relation as to the found energy subtraction images.
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