Breast radiography: phantom, equipment performance, and radiation dosage comparisons for twenty-eight major mammography centers in the midwest. Work in progress.

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Abstract
Mammography tests [in humans] that were conducted at 28 midwest medical centers were discussed. Equipment-parameter measurements were made, and images that were obtained with the Stanton Mark IIR Mammography Phantom were studied to compare image quality. Variations in equipment parameters and techniques can result in differences in the imaging of various sized phantom fibril and speck groups.