A tomographic physical phantom of the newborn child with real-time dosimetry. II. Scaling factors for calculation of mean organ dose in pediatric radiography
A tomographic physical phantom of the newborn child with real-time dosimetry. II. Scaling factors for calculation of mean organ dose in pediatric radiography
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DOI：
10.1118/1.2256687
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发表时间：
2006-09-01
期刊：
影响因子：
3.8
通讯作者：
Bolch, Wesley E.
中科院分区：
文献类型：
--
作者：
Staton, Robert J.;Jones, A. Kyle;Bolch, Wesley E.
在最近完成了一个包含金属氧化物半导体场效应晶体管（MOSFET）剂量测定系统的断层物理新生儿剂量测定体模后，有必要推导出比例因子，以便通过MOSFET剂量计（本期前一篇文章）计算物理体模给定点剂量测量中的器官剂量。在这项研究中，我们提出了使用投影射线照片数据的比例因子的初步发展。这些点到器官剂量比例因子（SFPOD）是使用从与物理体模相同的数据集创建的计算体模计算的，但也包括许多分割的内部器官和组织。这些比例因子的创建进行了讨论，以及相关的错误时，只使用点剂量测量来计算平均器官剂量和有效剂量的物理幻影。各种器官的比例因子从低至0.70到高达1.71不等。此外，将改进的计算幻影到物理幻影使用比例因子的能力进行了讨论。本文提出了一套全面的SFPOD值，用于新生儿患者的儿科X线摄影。(c)2006年美国医学物理学家协会。
Following the recent completion of a tomographic physical newborn dosimetry phantom with incorporated metal-oxide-semiconductor field effect transistor (MOSFET) dosimetry system, it was necessary to derive scaling factors in order to calculate organ doses in the physical phantom given point dose measurements via the MOSFET dosimeters (preceding article in this issue). In this study, we present the initial development of scaling factors using projection radiograph data. These point-to-organ dose scaling factors (SFPOD) were calculated using a computational phantom created from the same data set as the physical phantom, but which also includes numerous segmented internal organs and tissues. The creation of these scaling factors is discussed, as well as the errors associated when using only point dose measurements to calculate mean organ doses and effective doses in physical phantoms. Scaling factors for various organs ranged from as low as 0.70 to as high as 1.71. Also, the ability to incorporate improvements in the computational phantom into the physical phantom using scaling factors is discussed. An comprehensive set of SFPOD values is presented in this article for application in pediatric radiography of newborn patients. (c) 2006 American Association of PhYsicists in Medicine.