Development of skeletal system for mesh-type ICRP reference adult phantoms
Development of skeletal system for mesh-type ICRP reference adult phantoms
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DOI：
10.1088/0031-9155/61/19/7054
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发表时间：
2016-10-07
影响因子：
3.5
通讯作者：
Lee, Choonsik
中科院分区：
文献类型：
--
作者：
Yeom, Yeon Soo;Wang, Zhao Jun;Lee, Choonsik
出版物110中描述的国际放射防护委员会（ICRP）的参考成人计算体模是基于成年男性和女性患者的全身计算机断层扫描（CT）图像的体素型计算体模。这些体模的体素分辨率为几毫米的量级，并且诸如眼睛透镜、皮肤和某些器官的壁的较小组织不能在体模中被适当地限定，从而导致针对弱穿透辐射的剂量系数计算的限制。为了解决ICRP-110体模的局限性，最近成立了一个ICRP工作组，目前正在将体素体模转换为高质量的网格格式。作为转换项目的一部分，本研究构建了人体最重要、最复杂的器官之一骨骼模型。然后通过计算宽平行光子束和电子束的红骨髓（RBM）和骨内膜剂量系数（DC）并将计算值与原始ICRP-110体模的计算值进行比较来测试构建的骨骼模型。结果表明，对于光子曝光，有一个一般良好的协议之间的网格型体模和原始体素型ICRP-110体模的DC，即剂量差异小于7%，在所有情况下，除了0.03 MeV的情况下，其中最大的差异为14%。另一方面，对于电子曝光（
The reference adult computational phantoms of the international commission on radiological protection (ICRP) described in Publication 110 are voxel-type computational phantoms based on whole-body computed tomography (CT) images of adult male and female patients. The voxel resolutions of these phantoms are in the order of a few millimeters and smaller tissues such as the eye lens, the skin, and the walls of some organs cannot be properly defined in the phantoms, resulting in limitations in dose coefficient calculations for weakly penetrating radiations. In order to address the limitations of the ICRP-110 phantoms, an ICRP Task Group has been recently formulated and the voxel phantoms are now being converted to a high-quality mesh format. As a part of the conversion project, in the present study, the skeleton models, one of the most important and complex organs of the body, were constructed. The constructed skeleton models were then tested by calculating red bone marrow (RBM) and endosteum dose coefficients (DCs) for broad parallel beams of photons and electrons and comparing the calculated values with those of the original ICRP-110 phantoms. The results show that for the photon exposures, there is a generally good agreement in the DCs between the mesh-type phantoms and the original voxel-type ICRP-110 phantoms; that is, the dose discrepancies were less than 7% in all cases except for the 0.03 MeV cases, for which the maximum difference was 14%. On the other hand, for the electron exposures (