| 摘要 |
PROBLEM TO BE SOLVED: To reduce adverse effect of beam hardening in an energy subtraction processing apparatus. SOLUTION: A parameter altering means 2 alters preset parameters Ka, Kb, Kc for the energy subtraction processing based on a ratio of scale factors Gp1, Gp2 (=Gp2/Gp1) that is one of image processing conditions received from the image processing unit 20 for both images P1, P2 being objects of the energy subtraction processing and an energy subtraction processing means 4 performs energy subtraction processing on image-processed (normalized) image data S1', S2' by using altered parameters Ka', Kb', Kc'. |
