摘要
辐照仿真人体模型是放射治疗和空间辐照研究的重要装备,实现其数字化建模,提高制造精度和仿真程度是仿真假人研究的重点和难点之一。以"成都剂量体模"(CDP)的序列CT切片集为源数据,运用MATLAB软件,通过图像预处理、图像提取等数字图像处理技术获得人体器官的点云数据;在CATIA软件Digitized Shape Editor模块中处理点云数据得到肝脏、肺、肾和胃等主要器官和组织的三维实体模型;以人体骨骼为基础建立人体器官装配坐标系;根据器官的"局部坐标系原点"、"标志点"和"特征点"与人体骨骼的相对位置,确定器官在人体器官装配坐标系中的坐标;利用Pro/E软件完成人体主要器官(异形体零件)装配。实验证明利用该方法建立的三维辐照仿真假人数字化模型与CDP具有较高的等效程度,为人体参数化设计奠定了理论基础,能够满足辐照仿真假人数字化生产的要求。
Radiological anthropomorphic phantom is a vital equipment for radiotherapy and space radiation research. One of the most important and difficult points of the research on building digital model for anthropomorphic phantom is to, strengthen the accuracy of manufacturing and improve the simulation degree. Taking the CT sequence slice sets of Chengdu dosimetric phantom（CDP） as the basic data, MATLAB software was applied. The point cloud data of human organs were obtained by using the digital image processing techniques, including image preprocessing and image extraction; the obtained point cloud data were processed in the Digitized Shape Editor of CATIA software to establish the three-dimensional solid models of main organs and tissues, such as liver, lungs, kidney and stomach. An assembly coordinate system of human organs based on human skeletons was established in the paper. The local coordinate system origins, marker points and feature points of organs were relative to some positions in human skeletons, which were used to determine the organs＇ coordinates in the assembly coordinate system. And the Pro/E software was applied to finish the assembly of main human organs（out-of-shape components）. The experiment proves the three-dimensional digital model of radiological anthropomorphic phantom established in this way has high equivalent degree with CDP, laying the theoretical foundation for the parametric design of human body and meeting the demand of the digital production of radiological anthropomorphic phantom.
出处
《中国医学物理学杂志》
CSCD
2016年第5期463-467,共5页
Chinese Journal of Medical Physics
基金
航天医学基础与应用国家重点实验室研究基金(SMFA12B03)
载人航天领域预先研究项目(040401)
