| 摘要 |
PURPOSE:To prevent unnecessary shadow from appearing on a film, by decreasing an expansion rate in X-ray projection, by constituting a grid in a body while specifying the thickness of an X-ray detecting element, that of each electrode leading- out line, and the shape of a mount base, etc. CONSTITUTION:Photoconductor detecting element 41 is mounted on nearly annular mount base 44. The thickness of X-ray detecting element 41 is 100-800mum in terms of aluminum regarding the reduction of X rays, and electrode leading-out lines 42-1 and 43-2 are formed of aluminum films of <30mum in thickness. On both their surfaces, thin films 45-1 and 45-2 for insulation and aluminum foils 46-1 and 46-2 for electromagnetic shielding are provided and cover 47 for operation is further provided. At the X-ray input surface side, grid 48 for scattering X-ray removal is added and made in one body.
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