| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray radiographing apparatus capable of stably obtaining fixed image quality even while evading adverse effects by body movement by selecting a mask image on the basis of the detection of the arrival of a contrast medium. SOLUTION: Since arrival of the contrast medium at an image pickup part is detected by a timing detection means 23, a selection means 27 selects an image stored in a storage means 17 before the arrival as the mask image. Thus, since the contrast medium is not projected in the mask image and it is hardly affected by the body movement of a subject, it is ideal as the mask image in a subtraction processing and the fixed image quality is stably obtained. COPYRIGHT: (C)2005,JPO&NCIPI
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