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[en] A working party of the Department of Health and Social Security (DHSS) concerned with the assessment of performance of radioisotope-imaging equipment designed a test pattern called the Williams Phantom. The criteria and design are discussed. It consists of four 'cold' and four 'hot' areas. One Williams Phantom was sent to each radioisotope-imaging centre in Great Britain: the images produced were sent to the DHSS. The variation in image quality was large. A comprehensive sample of the images of the phantom produced on a variety of radioisotope scanners and γ cameras is presented to illustrate a number of general observations made by the working party. (U.K.)
Source
British Institute of Radiology Special Report; no. 9; 1976; 24 p; British Institute of Radiology; London; ISSN 0306-2120; 