| 摘要 |
PROBLEM TO BE SOLVED: To provide radiographic equipment having a grid generating no moire irrelevant to an imaging time and an imaging distance. SOLUTION: This radiographic equipment is provided with a grid plate radially disposed with radiation absorbing members, and a means for rotatingly driving the grid plate. Scattered radiation out of the radiations transmitting through a subject is absorbed by entering the sides of the radiation absorbing members. The radiations other than the scattered radiation reach radiation detecting means. Shades of the radiation absorbing members disposed radially appear on the radiation detecting means, however, no radiations other than the scattered radiation are emitted to the sides of the radiation absorbing members irrelevant to the distance between a radiation source and the grid. On the other hand, the shades similarly rotate at a fixed speed by driving of the rotation. Therefore the shades of the radiation absorbing members pass through at a fixed time interval in any pixels on the radiation detecting means. COPYRIGHT: (C)2006,JPO&NCIPI
|
