肿瘤预防与治疗Issue(2)：74-76,3.DOI:10.3969/j.issn.1674-0904.2014.02.003
精确放疗中热塑定位材料对皮肤表面剂量的影响
The Effect of Home-made Thermoplastic Mask on the Surface Dose of Skin in Precise Radiotherapy
李建 1康盛伟 1祁国海 1钟海洛 1吴大可 1王培1
作者信息
- 1. 四川省肿瘤医院放疗中心，成都 610041
- 折叠
摘要
Abstract
[ Abstract] Objective: To investigate the influence of thermoplastic masks on the surface dose of skin under differ-ent radiation energy. Methods: Multichannel TQ-2000 dosimeter, semiconductor detectors, PMMA phantom, Siemens Primus-H accelerator, home-made thermoplastic mask including 2mm in thickness stretching membrane without holes, original 2. 4mm in thickness membrane without holes and 2mm in thickness stretching mesh mask were adopted in this stud-y. The influence of these masks on the radiation dose on the surface of skin in different radiation field size was measured. Results:Comparing the surface dose increment between the condition of wearing and not wearing a mask in accordance with the order of original mask without holes, stretching membrane without holes, and stretching mesh mask, the dose increment was 29. 5%,25. 5% and 23. 9% respectively when field size was 5cmí5cm, 27. 1%,23. 8% and 22. 3% when field size was 10cmí10cm, 24. 5%,20. 8% and 19. 6% when field size was 15cmí15cm under 6MV radiation energy;41. 2%, 35. 5% and 32. 1% when field size was 5cm í5cm; 37. 8%,32. 6% and 30.0% when field size was 10cm í10cm;30.1%,25. 8% and 23. 9% when field size was 15cmí15cm under 15MV radiation energy. Conclusion: The effect of mask on the surface dose of skin increases along with the increasing of radiating energy and decreases along with the in-creasing of field size. The influence on the surface does of skin is relatively lower when thinner mesh masks are applied. Under fixed field size, the influence increases in the sequence of original membrane without holes, stretching mask without holes, and stretching mesh mask. How to protect skin and revise dose distribution in TPS treatment planning should be paid more attention to in clinical practice.关键词
热塑膜/表面剂量/剂量测量Key words
Thermoplastic Mask/Surface Dose/Dose Measurement分类
医药卫生引用本文复制引用
李建,康盛伟,祁国海,钟海洛,吴大可,王培..精确放疗中热塑定位材料对皮肤表面剂量的影响[J].肿瘤预防与治疗,2014,(2):74-76,3.
