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British Journal of Radiology (1989) 62, 163-167
© 1989 British Institute of Radiology
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The British Journal of Radiology, Vol 62, Issue 734 163-167, Copyright © 1989 by British Institute of Radiology

ARTICLES

Films, screens and cassettes for mammography

J Law and AE Kirkpatrick
Department of Medical Physics & Medical Engineering, Western General Hospital, Edinburgh.

Various film-screen combinations intended for mammography have been compared for image quality and for dose. Image quality was assessed as in an earlier paper, using a test object having details which are both realistic and quantitative. Relative doses required to give film densities of 1.0 were measured. The Kodak MinR-MinR combination was taken as a standard against which others were compared, and in general a lower dose was accompanied by poorer image quality. The Fuji NH film with Fuji Hi-Mammo screen was the sole exception, giving slightly better image quality at about half the dose required by the MinR combination. A number of cassettes were also compared with each other and with evacuated envelopes. The Dupont Cronex cassette and three carbon-fibre fronted cassettes all performed well in image quality.




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