| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital subtraction device, by which a subtracted image of an imaging part of a subject can be obtained appropriately and speedily. SOLUTION: The digital subtraction device is provided with a supply control circuit 33 for performing subtraction of the image with high-frequency components eliminated (mask image) and a basic image (live image) which is an X-ray transmission image which has been shot separate from the X-ray transmission image for generating the mask image. Accordingly, a basic image (live image) which does not include the delay corresponding to the time necessary for frequency characteristic conversion can be an object of subtraction. Since the high-frequency components of primary concern is included in the basic image (live image) which is shot separately, even though the time following the properties of the low-frequency components to be eliminated become worse, a subtracted image and the like can be displayed with a minimum delay and a subtracted image which can follow the movement of the subject can be provided. |
