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Contrast Detail Phantom for Mammography Model 18-252 Model 18-252 Introduction The Contrast Detail Phantom for Mammography is designed to provide a means of quantitatively testing and monitoring the total performance of an entire mammographic imaging chain. Its small size, as well as the number and distribution of holes simulating embedded objects, make this phantom particularly useful in evaluating digital spot mammography systems. With 49 holes generating subtle contrast variations, the phantom makes it possible to detect small changes in overall system performance. The Contrast Detail Phantom for Mammography contains a 7 x 7 matrix of objects. The diameter of each row of objects decreases from 0.169 to 0.007 inch. In each row, the subject contrast decreases from approximately 6.6% to 0.41% at

mammographic energies. Applications The Contrast Detail Phantom for Mammography is easy to use…Simply place the phantom on the image receptor surface in the same position as a breast. Position the x-ray tube and compression device as in a craniocaudal examination. When using the phantom on prone-position breast biopsy systems, use the rotating top plate of the phantom and the compression device to secure the phantom against the image receptor. Choose the appropriate kV and mAs factors (26 kV and 60 mAs works well on most systems), or select automatic exposure control. tal units Comparison of image quality with various screen-film combinations Evaluation of conventional, as well as digital and stereotactic modalities Determination of the optimum exposure technique, e.g., by variation of tube potential Comparison of image quality at various object thicknesses, by variation of the amount of Plexiglas® at a fixed density * Designed by M.A.O. Thijssen, Ph.D., K.R. Bijkerk, MSc. And J.M. Lindeyer, BSc., Project: Quality Assurance in Mammography (QAMAM), Department of Diagnostic Radiology, University Hospital, St. Radboud, Nijmegen, The Netherlands

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