基于NURBS曲面的中国儿童参考人曲面模型的建立

Establishment of Chinese Children’s Reference Human Surface Model Based on NURBS Surface

摘要: 目的：建立一组用于评测能谱CT下儿童受检者所受辐射剂量的中国儿童参考人曲面模型。方法：基于上海市第一妇婴保健院提供的近年出生的中国儿童真实CT扫描影像，采用NURBS曲面重构的方法构建组织和器官，构建包括0.25岁、1岁、5岁和10岁中国儿童曲面模型，其中5岁和10岁模型区分性别。结果：体模各器官位置和形态符合中国儿童解剖学特征，并且各组织和器官的质量与中国辐射防护用参考人参数相近，可以体现当代儿童的体格特征。结论：中国儿童曲面模型组可用于准确计算新能谱CT成像技术条件下儿童的辐射剂量，这对于合理降低中国儿童受检者辐射剂量具有重要意义。

Abstract: Objective: To establish a set of Chinese children reference human surface models for evaluating the radiation dose of child subjects under energy spectrum CT. Methods: Based on the real CT scan im-ages of Chinese children born in recent years provided by Shanghai First Maternal and Infant Health Hospital, tissues and organs were constructed by using NURBS surface reconstruction method, and the surface models of Chinese children aged 0.25, 1, 5 and 10 were constructed, among which the 5 and 10 years old models were gender differentiated. Results: The position and shape of the organs of the body model are consistent with the anatomical characteristics of Chinese children, and the quality of the tissues and organs is similar to the parameters of the reference human for radiation protection in China, which can reflect the physical characteristics of contemporary children. Conclu-sion: The Chinese children curved surface model group can be used to accurately calculate the radi-ation dose of children under the condition of new energy spectrum CT imaging technology, which is of great significance for reducing the radiation dose of Chinese children.