| 摘要 |
PROBLEM TO BE SOLVED: To perform RSM-DSA(real-time smoothed-digital subtraction angiography) in real-time in a very short time for processing by using an FPD(flat panel X-ray detector), while dispensing with a large-scale arithmetic circuit. SOLUTION: The image signal of the original image of an X-ray transmission image obtained from the FPD is guided to an optical signal processor 15, so as to be subjected to spatial frequency low-pass filter processing. Thus, the image signal of a blurred mask image is obtained at a high speed, so that the subtraction between the original image and the blurred image is performed by subtraction arithmetic computing unit 19. |
