3D-PCT-assisted CT-guided radioactive particle implantation precision
10.3760/cma.j.cn112271-20221212-00483
- VernacularTitle:3D打印共面模板辅助CT引导放射性粒子植入精度研究
- Author:
Haitao SUN
1
;
Zhe JI
;
Bin QIU
;
Yuliang JIANG
;
Jinghong FAN
;
Junjie WANG
Author Information
1. 北京大学第三医院肿瘤放疗科，北京 100191
- Keywords:
3D printing coplanar template;
Radioactive particle implantation;
Precision;
CT guidance
- From:
Chinese Journal of Radiological Medicine and Protection
2023;43(6):431-434
- CountryChina
- Language:Chinese
-
Abstract:
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 Subsequently, the needles were withdrawn by 10 mm, and the cold sources were implanted.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.
