全视野数字乳腺摄影中的X射线散射

X-ray scattering in full-field digital mammography.

作者信息

Nykänen Kirsi, Siltanen Samuli

机构信息

Instrumentarium Corp., Imaging Div., PO Box 20, Tuusula, 04301, Finland.

出版信息

Med Phys. 2003 Jul;30(7):1864-73. doi: 10.1118/1.1584160.

DOI:10.1118/1.1584160

PMID:12906205

Abstract

Effects of x-ray scattering on full-field digital mammography are analyzed with the scattering model of Seibert and Boone [Med. Phys. 15, 567-575 (1988)]. A new method is introduced for the estimation of model parameters from measurements. It is shown that with breasts thinner than a certain threshold, removing the anti-scatter grid leads to an improved contrast-to-noise ratio with a smaller patient dose. A fast approximate algorithm is presented for determining the scattered field in a gridless digital mammogram.

摘要

利用Seibert和Boone的散射模型[《医学物理》15, 567 - 575 (1988)]分析了X射线散射对全场数字化乳腺摄影的影响。引入了一种从测量中估计模型参数的新方法。结果表明，对于厚度小于某一阈值的乳房，去除反散射格栅可提高对比度噪声比，同时降低患者剂量。提出了一种快速近似算法，用于确定无格栅数字化乳腺摄影中的散射场。