| 摘要 |
PURPOSE:To obtain a uniform picture image with a good contrast, by arranging a scintillator with a small area via a shielding material containing heavy metal elements and rotating said scintillator. CONSTITUTION:A small scintillator 31 such as NaI, CsI and the like is arranged like a disc in an alternate combination with a shielding material such as Pb, and said detector assembly 30 is rotated by a rotational driving device 40 between the object to be inspected and an optical detector. Hereby, a uniform picture image with a good contrast is obtained. |
