| 摘要 |
An attachment for a scintillation camera to enable the camera to be used for measurement of bone mineral mass includes a grid holder adapted to be attached to the camera, a grid mounted on the grid holder and adapted to lie directly in front of the camera when the grid holder is attached to the camera, and an arm attached at one end to the grid holder and, at the other end, including a source holder. The source holder is entirely closed except that it defines an aperture directed toward the grid. The source holder is at least 50 cm from the grid, and the grid is focussed on the source holder.
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