The American College of Radiology and MQSA recommend a uniform 4 cm thick “high grade” cassette sized phantom for evaluation of mammography artifacts as it is often difficult to identify artifacts based on clinical or standard phantom images. CIRS has designed two phantoms sets to meet these recommendations. Each set contains 2 slabs. The Model 014C slabs each measures 18 X 24 X 2 cm thick. The Model 014E slabs each measures 24 X 30 X 2 cm thick. The small phantom measures 18 x 24 x 4 cm thick and the large phantom measures 24 x 30 x 4 cm thick.