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A preliminary investigation of the imaging performance of photostimulable phosphor computed radiography using a new design of mammographic quality control test object

FAXIL, The University of Leeds, Department of Medical Physics, Wellcome Wing ^* Department of Diagnostic Radiology, The General Infirmary, Leeds LS1 3EX, UK

Leeds Test Object TOR[MAM] has been designed to supplement the current FAXIL mammography test object TOR[MAX]. It contains a range of details that have a more natural radiographic appearance and has been designed as a test that more closely approximates the image quality achieved in clinical mammography. Physical aspects of the design and implementation of TOR[MAM] are presented. The TOR[MAM] has been used in a preliminary physical evaluation of the comparative image qualities produced by conventional (screen–film) and photostimulable phosphor computed mammography and the results are discussed. TOR[MAX] results are also presented. The influence of digital image processing (enhancement) on the image quality of computed mammograms is also considered. The results presented indicate the sensitivity of TOR[MAM].

Key Words: Mammography test object • Computed radiography

Received for publication June 18, 1991. Revision received November 11, 1991. Accepted for publication January 14, 1992.

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