Dosimetric effect of customized 3D-printed headrest in radiotherapy for head and neck tumor(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2024年第3期
- Page:
- 294-298
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Dosimetric effect of customized 3D-printed headrest in radiotherapy for head and neck tumor
- Author(s):
- PAN Zhanpeng1; SHI Songqi1; LI Simei1; CHEN Xiaojun2; GAN Qingquan2; CAO Xiaofei1
- 1. Department of Oncology, Nansha Branch, Guangzhou First Peoples Hospital, Guangzhou 511468, China 2. Department of Oncology, Guangzhou First Peoples Hospital, Guangzhou 510180, China
- Keywords:
- Keywords: three-dimensional printing headrest head and neck tumor dosimetry
- PACS:
- R811.1
- DOI:
- DOI:10.3969/j.issn.1005-202X.2024.03.005
- Abstract:
- Abstract: Objective To evaluate the dosimetric effect of three-dimensional (3D) printed headrests made of different materials in radiotherapy for head and neck tumor, and to evaluate whether the existence of customized 3D-printed headrest can be neglected during planning phase by comparing differences in target area doses, homogeneity index (HI), conformity index (CI), monitor units (MU), and organ-at-risk (OAR) dose. Methods Ten patients with head and neck tumors, including 5 cases with nasopharyngeal carcinoma and 5 with other head and neck tumors, were enrolled. The headrest contours were outlined using Monaco treatment planning system, and with the same calculation parameters, treatment plans were generated for scenarios without a headrest, with a standard headrest, and with 3D-printed headrests made of 10% filled polylactic acid and thermoplastic polyurethane. The target area doses, OAR dose, MU, and other results were recorded and subjected to statistical analysis. Results No significant differences were observed among the 4 groups (ignoring headrest, standard headrest, 3D-printed headrests with 10% filled polylactic acid and thermoplastic polyurethane) in parameters such as D95, D5, Dmean, HI, CI, MU, and OAR dose (the maximum dose to the spinal cord) (P>0.05). Considering the presence of the headrest, significant differences were found in CI for nasopharyngeal carcinoma and other head and neck tumors (P<0.05). Conclusion During the planning phase, the existence of customized 3D-printed headrest can be ignored, but it should be noted that the presence of a headrest may reduce the MU in radiotherapy plans. When considering the headrest, the average CI of patients with other head and neck tumors is significantly higher than that with nasopharyngeal carcinoma.
Last Update: 2024-03-27