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Lookup NU author(s): Dr Colin Kotre
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This communication describes a novel design for a mammographic image quality test phantom, the final design of which was produced as a radiographer weekly quality assurance phantom for breast screening and symptomatic mammography. The phantom is based on low contrast test features which are built up by superimposing sheets of Mylar overhead projector transparency, on which the test features are printed using a standard LaserJet printer. The required radiation contrast at mammographic energies is produced by the approximately 50 % by weight component of iron oxide(Fe3O4) present in the toner. An easily replicated design of mammographic image quality phantom based on LaserJet printed test features is described. Approximately 40 of these phantoms were constructed, and these have been used successfully for 5 years in both breast screening and symptomatic mammography. The phantom design offers a performance similar to much more expensive mammographic contrast-detail phantoms, but suffers from the disadvantage that high contrast resolution bar patterns cannot be produced using the standard printing process.
Author(s): Kotre CJ, Porter DJT
Publication type: Article
Publication status: Published
Journal: British Journal of Radiology
ISSN (print): 0007-1285
ISSN (electronic): 1748-880X
Publisher: British Institute of Radiology
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