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Mammography focal spot measurement with a star pattern: Techniques to avoid inaccuracies
Author(s) -
KimmeSmith Carolyn,
Chatziioannou Arion
Publication year - 1993
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597124
Subject(s) - mammography , magnification , star (game theory) , computer science , image quality , image resolution , optics , medical physics , artificial intelligence , physics , medicine , image (mathematics) , cancer , breast cancer , astrophysics
The increased emphasis on mammography acceptance testing and quality control make the star pattern test an essential component of the procedure for diagnosing poor resolution due to large focal spots. In this paper procedures for calculating magnification and the correct angle of the star pattern to use are described. The preferred placement of the star pattern in the field and proper exposure technique is also discussed.