A High Sensitivity Shadow-shield Whole Body Monitor with Scanning-bed and Tilting Chair Geometries, Incorporated in a Mobile Laboratory

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Abstract
The development of a shadow-shield, whole-body monitor of high sensitivity is described. The monitor is installed in a mobile laboratory and is intended for medical research in collaboration with Scottish hospitals. Normally scanning-bed geometry is used but, by modification of the shield, a tilting-chair geometry is achieved to accommodate patients who cannot lie flat. It is shown that the performance of the monitor is better than most conventional steel-room monitors in Britain, while the capital cost as a static monitor, with a 100-channel analyzer, is only about [pound sterling] 6,500. Redistribution effects are briefly described and have not exceeded [plus or minus] 7% in patients following the oral administration of 59Fe.