RPI-AM and RPI-AF, a pair of mesh-based, size-adjustable adult male and female computational phantoms using ICRP-89 parameters and their calculations for organ doses from monoenergetic photon beams.
RPI-AM and RPI-AF, a pair of mesh-based, size-adjustable adult male and female computational phantoms using ICRP-89 parameters and their calculations for organ doses from monoenergetic photon beams.
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DOI：
10.1088/0031-9155/54/19/015
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发表时间：
2009-10-07
影响因子：
3.5
通讯作者：
Xu XG
中科院分区：
文献类型：
--
作者：
Zhang J;Na YH;Caracappa PF;Xu XG
本文介绍了一对成年男性和成年女性的计算幻影，是兼容的第50百分位人口的解剖参数，由国际辐射防护委员会（ICRP）的发展。的phantomy设计完全使用多边形网格表面的边界再现（BREP）的几何形状，提供了有效地变形的形状和大小的各个器官，以及身体姿势的能力。采用一组来自Anatomium™ 3D P1 V2.0的表面网格模型，包括140个器官（500个可用器官中），以提供器官水平的基本解剖表示。仔细调整器官质量，使其与ICRP Publication 89中提供的参考值的相对误差在0.5%以内。最终确定的体模被指定为RPI成年雄性（RPI-AM）和成年雌性（RPI-AF）体模。为了使用MCNPX蒙特卡罗代码计算器官剂量，随后将这些体模转换为体素格式。在本研究中，考虑了六个标准外部光子源几何形状中10 keV和10 MeV之间的单能光子：四个平行光束（前后，后前，左侧和右侧），一个旋转光束和一个各向同性光束。将结果制成表格，作为能量密度到器官吸收剂量的转换系数和能量密度到有效剂量的转换系数，并与来自ICRP计算体模、雷克斯和REGINA的结果进行比较。一个普遍的协议被发现的有效剂量从这两套phantoms的光子能量大于约300千电子伏。然而，对于低能光子和某些单个器官，由于特定的解剖特征，吸收剂量表现出深刻的差异。例如，在横向源方向上，臂的位置在低于300 keV时对肺部的剂量影响超过20%，并且在PA源方向上，睾丸的垂直位置在低于150 keV时对剂量影响超过80%。RPI成人幻影中器官和姿势的可变形性和可调节性可能不仅对普通工人或患者用于辐射防护目的有用，而且在涉及解剖学和姿势变异性的研究中也是有用的，这在未来的辐射防护剂量学中是重要的。
This paper describes the development of a pair of adult male and adult female computational phantoms that are compatible with anatomical parameters for the 50th percentile population as specified by the International Commission on Radiological Protection (ICRP). The phantoms were designed entirely using polygonal mesh surfaces—a Boundary REPresentation (BREP) geometry that affords the ability to efficiently deform the shape and size of individual organs, as well as the body posture. A set of surface mesh models, from Anatomium™ 3D P1 V2.0, including 140 organs (out of 500 available) was adopted to supply the basic anatomical representation at the organ level. The organ masses were carefully adjusted to agree within 0.5% relative error with the reference values provided in the ICRP Publication 89. The finalized phantoms have been designated the RPI adult male (RPI-AM) and adult female (RPI-AF) phantoms. For the purposes of organ dose calculations using the MCNPX Monte Carlo code, these phantoms were subsequently converted to voxel formats. Monoenergetic photons between 10 keV and 10 MeV in six standard external photon source geometries were considered in this study: four parallel beams (anterior–posterior, posterior–anterior, left lateral and right lateral), one rotational and one isotropic. The results are tabulated as fluence-to-organ-absorbed-dose conversion coefficients and fluence-to-effective-dose conversion coefficients and compared against those derived from the ICRP computational phantoms, REX and REGINA. A general agreement was found for the effective dose from these two sets of phantoms for photon energies greater than about 300 keV. However, for low-energy photons and certain individual organs, the absorbed doses exhibit profound differences due to specific anatomical features. For example, the position of the arms affects the dose to the lung by more than 20% below 300 keV in the lateral source directions, and the vertical position of the testes affects the dose by more than 80% below 150 keV in the PA source direction. The deformability and adjustability of organs and posture in the RPI adult phantoms may prove useful not only for average workers or patients for radiation protection purposes, but also in studies involving anatomical and posture variability that is important in future radiation protection dosimetry.
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影响因子：
3.5
作者：
Becker, Janine;Zankl, Maria;Petoussi-Henss, Nina
通讯作者：
Petoussi-Henss, Nina
影响因子：
3.5
作者：
Lee, Choonik;Lee, Choonsik;Bolch, Wesley E.
通讯作者：
Bolch, Wesley E.
影响因子：
3.5
作者：
Hegenbart L;Na YH;Zhang JY;Urban M;Xu XG
通讯作者：
Xu XG
DOI：
10.1109/tvcg.2003.1196006
发表时间：
2003-04-01
影响因子：
5.2
作者：
Nooruddin, FS;Turk, G
通讯作者：
Turk, G
影响因子：
3.5
作者：
Lee, Choonsik;Lodwick, Daniel;Bolch, Wesley E.
通讯作者：
Bolch, Wesley E.