Abstract：Objective To investigate the influence of 3D printed head mask on X-ray therapeutic dose. Methods Choose the 3D
printing epoxy resin head mask (density 1.076 g/cm3) and domestic thermoplastic head mask (density 1.12 g/cm3) used by our
hospital, Under the conditions of 6 MV X-ray, 100 cm source skin distance and 10 cm×10 cm irradiation field, the EBT3 disposable
films was used to measure and compare the doses on and 0.5 cm, 1.0 cm, 1.5 cm below the surface of two different molds. The study
on the influence of 3D printing head film on the dose of X-ray treatmen was conducted. The morphology and structure of the 3D
printed head mask were divided into two types: non-porous and porous. Among them, the diameter of a porous membrane was
0.2 cm and 0.4 cm, and the pitch of the holds was 0.15 cm. Results The use of head mask mainly affectef the built-up area of X-ray
therapeutic dose. The surface dose of 3D printing head mask and thermoplastic head mask with 0.15 cm thickness and 0.4 cm mesh
diameter were 38% and 40%, respectively. The surface doses of 3D printing head mask with mesh diameters of 0.4 cm at thickness
of 0.15 cm and 0.20 cm were 38% and 49%, respectively. When the thickness of the 3D printing head mask was 0.15 cm, the surface
dose of the 3D printing head mask was 50%, 44% and 38%, respectively, when the pore diameter was 0.2 cm and the mesh diameter
was 0.4 cm. Conclusion The use of head mask has a great influence on the absorbed dose on the patient’s body surface. The higher
the density of the head mask with different materials, the larger surface absorbed dose. The larger the mask thickness of the same
material, the smaller the pore diameter, the larger the surface absorption dose. 3D printing technology can individually produce head
masks of different materials, thicknesses and pore sizes. Compared with domestic thermoplastic head films, it has certain advantages
in clinical practice and is worthy of further research.
闫慧娟，王斌，薛涛，孙云川，刘光波，刘志坤，周丽霞，王珮烨. 3D打印头膜对X射线治疗剂量的影响[J]. 中国医疗设备, 2021, 36(4): 177-180.
YAN Huijuan, WANG Bin, XUE Tao, SUN Yunchuan, LIU Guangbo, LIU Zhikun, ZHOU Lixia, WANG Peiye. Impact of 3D Printed Head Mask on X-ray Therapeutic Dose. China Medical Devices, 2021, 36(4): 177-180.
