| 孙海涛,吉喆,邱斌,姜玉良,范京红,王俊杰.3D打印共面模板辅助CT引导放射性粒子植入精度研究[J].中华放射医学与防护杂志,2023,43(6):431-434 |
| 3D打印共面模板辅助CT引导放射性粒子植入精度研究 |
| 3D-PCT-assisted CT-guided radioactive particle implantation precision |
| 投稿时间：2022-12-12 |
| DOI：10.3760/cma.j.cn112271-20221212-00483 |
| 中文关键词: 3D打印共面模板 放射性粒子植入 精度 CT引导 |
| 英文关键词:3D printing coplanar template Radioactive particle implantation Precision CT guidance |
| 基金项目:国家重点研发计划项目（2019YFB1311300，2019YFB1311305）；国家自然科学基金（51971116）；北京大学第三医院院内重点项目（BYSYZHKC2021117，BYSYZD2019010） |
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| 中文摘要: |
| 目的 利用两种模体研究3D打印共面模板辅助CT引导放射性粒子植入精度，并比较两种模体差异，为放射性粒子植入提供参考。方法 在近距离治疗计划系统设计进针路径并获取针尖坐标值，按照进针路径分别在定制模体和肝脏模体插入植入针，植入金标，退针10 mm，植入冷源，分别记录针尖、金标、冷源坐标，通过计算空间两点之间的距离获取植入针精度，第1颗粒子精度，拔针后粒子的精度，通过独立样本t检验，比较上述精度在两种模体中的差异。结果 3D打印共面模板辅CT引导放射性粒子植入穿刺针精度，第1颗粒子精度及拔针后粒子精度在定制模体和肝脏模体中分别是（1.89±0.72）和（2.14±0.88） mm （P>0.05），（2.03±1.14）和（2.42±1.12） mm （P>0.05），（-1.96±1.29）和（-2.82±0.91） mm （t=2.09，P=0.046）。结论 3D打印共面模板辅CT引导放射性粒子植入具有高效，稳定、精确，在两种模型中精度差异较小。 |
| 英文摘要: |
| Objective To study the precision of 3D printing coplanar template (3D-PCT) assisted CT-guided radioactive particle implantation using two types of phantoms, and compare the differences between the phantoms, in order to provide reference for radioactive particle implantation.Methods The needle inserting path was designed in the brachytherapy treatment planning system (BTPS) and the needle tip coordinates were obtained. Following the needle inserting path, the implant needles were inserted into the custom and the liver phantoms, respectively. Then gold markers were implanted through the needles. Subsequently, the needles were withdrawn by 10 mm, and the cold sources were implanted. The coordinates of needle tips, gold markers, and cold sources were recorded. The precision of implanted needles, first particles, and particles after needle withdrawal were obtained by calculating the distance between two points in the space. Finally, the differences between the two phantoms were compared through independent samples t-test.Results In the 3D-PCT-assisted CT-guided radioactive particle implantation, the precision of implanted needles, first particles, and particles after needle withdrawal in the custom and the liver phantoms was (1.89±0.72) and (2.14±0.88) mm (P>0.05), (2.03±1.14) and (2.42±1.12) mm (P>0.05), and (-1.96±1.29) and (-2.82±0.91) mm (t=2.09, P=0.046), respectively.Conclusions The 3D-PCT-assisted CT-guided radioactive particle implantation is efficient, stable, and precise, showing slight precision differences between the two phantoms. |
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