| 摘要 |
PURPOSE:To obtain a good subtraction picture image having good image quality in a short time by recording simultaneously markers serving as reference points to storable phosphor sheets used for a subtraction processing method in the positions fixed to the radiation picture. CONSTITUTION:The two marker forming members 2A, 2B formed of a radiation shielding material fixed on a photographing table 1 in the stage of photographing radiation picture images are stored and recorded in a storable phosphor sheet 5 below the table 1 by the X-ray of an X-ray source 4 installed above the table 1 together with an object 3, whereby plural sheets of the storable phosphor sheets photographed with the radiation picture images are obtained. The subtraction processing from the respective storable phosphor sheets is accomplished by detecting the positions of the markers recorded in the individual sheets 5, moving relatively the storable phosphor sheets with respect to the excited light for scanning in accordance with the coodinates of the detected marker positions to put the position coodinates of the markers in the position preset with respect to the excited light for scanning and obtaining the subtraction image. |
