双能对比增强数字化乳腺摄影：使用蒙特卡罗代码进行患者辐射剂量估计

Dual-energy contrast-enhanced digital mammography: patient radiation dose estimation using a Monte Carlo code.

作者信息

Yakoumakis E, Tzamicha E, Dimitriadis A, Georgiou E, Tsapaki V, Chalazonitis A

机构信息

Medical Physics Department, University of Athens, Athens, Greece.

Medical Physics Department, Konstantopoulio General Hospital of Nea Ionia, Attiki, Greece

出版信息

Radiat Prot Dosimetry. 2015 Jul;165(1-4):369-72. doi: 10.1093/rpd/ncv098. Epub 2015 Apr 1.

DOI:10.1093/rpd/ncv098

PMID:25836682

Abstract

Mammography is a standard procedure that facilitates breast cancer detection. Initial results of contrast-enhanced digital mammography (CEDM) are promising. The purpose of this study is to assess the CEDM radiation dose using a Monte Carlo code. EGSnrc MC code was used to simulate the interaction of photons with matter and estimate the glandular dose (Dg). A voxel female human phantom with a 2-8-cm breast thickness range and a breast glandular composition of 50 % was applied. Dg values ranged between 0.96 and 1.45 mGy (low and high energy). Dg values for a breast thickness of 5.0 cm and a glandular fraction of 50 % for craniocaudal and mediolateral oblique view were 1.12 (low energy image contribution is 0.98 mGy) and 1.07 (low energy image contribution is 0.95 mGy), respectively. The low kV part of CEDM is the main contributor to total glandular breast dose.

摘要

乳腺钼靶摄影是一种有助于乳腺癌检测的标准程序。对比增强数字乳腺钼靶摄影（CEDM）的初步结果很有前景。本研究的目的是使用蒙特卡罗代码评估CEDM的辐射剂量。EGSnrc MC代码用于模拟光子与物质的相互作用并估计腺体剂量（Dg）。应用了一种体素女性人体模型，其乳房厚度范围为2 - 8厘米，乳腺组织成分占50%。Dg值在0.96至1.45毫戈瑞之间（低能和高能）。对于头尾位和内外斜位视图，乳房厚度为5.0厘米且腺体比例为50%时，Dg值分别为1.12（低能图像贡献为0.98毫戈瑞）和1.07（低能图像贡献为0.95毫戈瑞）。CEDM的低千伏部分是乳腺总腺体剂量的主要贡献者。