| 摘要 |
PURPOSE:To improve low contrast resolution by arranging a photoelectric conversion element on the radiant ray incident side of a radiant ray detecting element. CONSTITUTION:A scintillator 6 is mounted on a holding board 7. The photoelectric conversion element 5 is arranged on the X ray incident side of the scintillator 6. The element 5 consists of a silicon photodiode and is fixed adhesives having high light transmissibility. A reflecting material and a light shielding material are arranged around the scintillator 6. An amplifying means 9 having an A/D conversion function is fitted to a printed board 8. The printed board 8 is fixed on a projector part 7' of the holding board 7 with a screw. The element 5 is connected with the printed board 8 by a bonding wire 10. X rays are made incident from the X direction. A low energy component of the X rays is highly absorbed at a thin part of the scintillator 6. The element 5 detects the low energy component of the X rays clearly. |
