| Sun Haitao,Ji Zhe,Qiu Bin,Jiang Yuliang,Fan Jinghong,Wang Junjie.3D-PCT-assisted CT-guided radioactive particle implantation precision[J].Chinese Journal of Radiological Medicine and Protection,2023,43(6):431-434 |
| 3D-PCT-assisted CT-guided radioactive particle implantation precision |
| Received:December 12, 2022 |
| DOI：10.3760/cma.j.cn112271-20221212-00483 |
| KeyWords:3D printing coplanar template Radioactive particle implantation Precision CT guidance |
| FundProject: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） |
| Author Name | Affiliation | E-mail | | Sun Haitao | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | | | Ji Zhe | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | | | Qiu Bin | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | | | Jiang Yuliang | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | | | Fan Jinghong | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | | | Wang Junjie | Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China | junjiewang_edu@sina.cn |
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| 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 Subsequently, the needles were withdrawn by 10 mm, and the cold sources were implanted.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. |
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