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The British Journal of Radiology, Vol 70, Issue 832 409-411, Copyright © 1997 by British Institute of Radiology
ARTICLES |
SJ Hill, K Faulkner, J Law and HC Starritt
Integrated Radiological Services Ltd, Unit 188, Liverpool, UK.
A requirement for a minimum viewing box brightness of 3000 cd m-2 for reading mammograms has been widely advocated. Some recent work has challenged that opinion by reporting no significant variation in visibility of low contrast and fine detail objects over a wide range of brightness levels. This paper provides further experimental evidence to support the latter conclusion, at least over the range 1340-4190 cd m-2, and suggests that the currently recommended minimum viewing box brightness levels need to be revised. The importance of reducing room lighting levels is fully confirmed.
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