期刊
HEALTH PHYSICS
卷 87, 期 5, 页码 507-511出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/01.HP.0000133364.55155.09
关键词
photons; Monte Carlo; dosimetry; internal; pregnancy
类别
资金
- NLM NIH HHS [1R03 LM007964-01] Funding Source: Medline
Specific absorbed fractions are essential for calculation of radiation dose from internal emitters. Existing specific absorbed fractions for pregnant women were calculated using the stylized models; in this work, a partial-body tomographic model for a pregnant woman was constructed from a rare set of CT images. Based on this tomographic model, the Monte Carlo code, EGS4-VLSI, was used to derive specific absorbed fractions. Monoenergetic, isotropic photon emitters from 15 keV to 4 MeV were distributed in different source organs, and doses were calculated to many target regions in the body. Even though the results showed general agreement with previous studies for higher energies, significant differences were also found, especially for lower energies. The main reasons for the differences are due to the variation of mass, geometry, and organ distances, and they demonstrate the influence of more realistic body models on dose calculations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据