Determination of X-Ray Spectra Incident on and Transmitted through Breast Tissue

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Abstract
X-ray spectra incident on and transmitted through breast [human] tissue were measured using a fresh whole excised breast. These spectra and corresponding radiographs show that hardening of the beam from a Mo anode X-ray tube by a 0.5-mm Al filter instead of the conventional 0.03-mm Mo filter allows shorter exposure times and reduces patient exposure. Acceptable image contrast is preserved in mammography of thick or dense breasts.

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