Effect of 3d-printed bolus installation on radiotherapy after radical mastectomy
10.12354/j.issn.1000-8179.2025.20241741
- VernacularTitle:3D打印补偿物安装方式对乳腺癌术后放射治疗的影响
- Author:
Liu RUI
1
;
Luo TAOHONG
;
Cao ZONGBAO
;
Ke XIAOLIN
;
Ling RUI
;
Li XUEWEN
Author Information
1. 遂宁市中心医院肿瘤中心放射治疗科(四川省 遂宁市 629018)
- Publication Type:Journal Article
- Keywords:
3D printing;
bolus;
skin fit;
air gap;
dosimetric index
- From:
Chinese Journal of Clinical Oncology
2025;52(3):140-143
- CountryChina
- Language:Chinese
-
Abstract:
Objective:By comparing the effects of installing 3d-printed bolus with or without positioning holes on the skin fit and patient dose distribution,the advantages and disadvantages of the two installation methods in the application of radiotherapy after radical breast cancer surgery were evaluated,and the reference was provided for clinical application.Methods:A total of 48 patients(34 patients with and 14 patients without positioning holes)who received radiotherapy for breast cancer in Suining Central Hospital from December 2022 to Au-gust 2024 were randomly selected.Three dimensional reconstruction of the air gap between the patient body surface and the 3d-printed bolus was conducted,and the tissue dose distribution of each case was analyzed.Comparative analysis was conducted using t-test to ana-lyze the differences of the skin fit and the key dosimetric indexes of target areas and organs at risk between the two bolus installation meth-ods.Results:The mean values of the maximum air gap height,air gap area and air gap volume of the group with positioning holes were lower than those of the group without positioning holes(P<0.05),and the skin fit showed better consistency.The target area conformity in-dex(CI),homogeneity index(HI),and affected lung radiation acceptance(V20,V5)of patients with positioning holes were better than those of patients without positioning holes(P<0.05).There was no significant difference in target area coverage of prescription dose,cardiac dose Dmean and spinal cord dose Dmax between two groups(P>0.05).Conclusions:The skin fit,dosimetric indexes of patient target area and or-gans at risk of 3d-printed bolus with positioning holes were superior to those without positioning holes,showing significant advantages in clinical applications.
