2000例质子治疗疗程的技术交付参数
Technical Delivery Parameters of 2000 Proton Treatment Courses.
作者信息
Deisher Amanda J, Whitaker Thomas J, Beltran Chris J, Foote Robert L, Haddock Michael G, Mahajan Anita
机构信息
Department of Radiation Oncology, Mayo Clinic, Rochester, MN, USA.
出版信息
Int J Part Ther. 2020 Winter;6(3):27-34. doi: 10.14338/IJPT-19-00066.1. Epub 2020 Feb 21.
PURPOSE
To summarize the technical delivery parameters of proton plans delivered at the Mayo Clinic in Rochester, Minnesota.
MATERIALS AND METHODS
The database of treated patient proton plans was queried to extract field parameters such as gantry angle, patient support angle, minimum and maximum water-equivalent depth (WED) treated, number of layers, field size, patient orientation, and monitor units. The plans were analyzed in aggregate, by disease site, and by fractionation.
RESULTS
There were 2963 proton plans for 2023 distinct treatment sites delivered between June 2015 and September 2018. The mean number of fields per plan was 2.8. The mean number of energy layers per field was 51.9. The mean monitor unit per field was 117.4. The median maximum field dimension was 12.4 cm; 95% of the fields had a maximum dimension < 28.7 cm, and the maximum field dimension was 39.8 cm. The median maximum field WED was 16.4 cm; 95% of the fields reached a maximum WED of ≤ 26.4 cm, and the maximum field WED was 32.4 cm.
CONCLUSION
A large variety of disease sites were treated using the maximum field size (40 cm) and WED (32.4 cm) capabilities of our half-gantry system.
目的
总结明尼苏达州罗切斯特市梅奥诊所实施的质子治疗计划的技术输送参数。
材料与方法
查询已治疗患者质子治疗计划的数据库，以提取诸如机架角度、患者支撑角度、治疗的最小和最大水等效深度（WED）、层数、射野大小、患者体位和监测单位等射野参数。对这些计划进行总体分析、按疾病部位分析以及按分次照射分析。
结果
2015年6月至2018年9月期间，针对2023个不同治疗部位实施了2963个质子治疗计划。每个计划的平均射野数为2.8个。每个射野的平均能量层数为51.9层。每个射野的平均监测单位为117.4个。射野最大尺寸的中位数为12.4厘米；95%的射野最大尺寸<28.7厘米，最大射野尺寸为39.8厘米。射野最大WED的中位数为16.4厘米；95%的射野最大WED≤26.4厘米，最大射野WED为32.4厘米。
结论
利用我们半机架系统的最大射野尺寸（40厘米）和WED（32.4厘米）能力治疗了多种疾病部位。
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