Backscatter factors for mammography calculated with Monte Carlo methods

The objective of this study is to establish a comprehensive set of backscat ter factors for mammography based on the exposure model proposed by the Eur opean Protocol on Dosimetry in Mammography. The Monte Carlo calculated back scatter factors (BSFs) presented in this study are for various exposure con ditions encountered in mammographic practice as well as in calibration proc edures. The data demonstrate the variation of the BSF as a function of the exposure parameters, hence enabling a better match with calibration conditi ons and, at the same time, reviewing the BSF data already recommended by th e European Protocol. Furthermore, earlier data for BSF for general diagnost ic radiology are validated.