Measurement of absorption dose outside irradiation field in IMRT.
Measurement of absorption dose outside irradiation field in IMRT.
复制标题
IMRT 中照射野外吸收剂量的测量。
DOI：
10.1093/rpd/ncx027
复制
发表时间：
2017
影响因子：
1
通讯作者：
Nishimura Y.
中科院分区：
文献类型：
--
作者：
Hirata M;Monzen H;Hanaoka K;Nishimura Y.
通过与放射治疗计划系统(TPS)计算值的比较，对前列腺调强放射治疗的照射野外吸收剂量进行了测量和评价。采用VARIAN CLINAC21EX/Eclipse和TomoTreatment计划系统对照射时间恒定的TPS进行计算。通过将玻璃元件剂量计放置在人骨封闭体模中，并在照射野内计划靶区体积来测量吸收剂量。危险的器官是直肠、脊髓、甲状腺、眼球和左肺。TPS、VARIAN CLINAC21EX/Eclipse和TomoTreatment计划系统的计算值分别在距等中心17 cm和55 cm处进行计算。照射野外吸收剂量随距离等中心距离的增加而发散(VARIAN/ECLE：P=0.03，断层治疗计划系统：P=0.25)。照射场外吸收剂量的计算值被低估。
The absorption dose outside the irradiation field for prostate intensity-modulated radiation therapy was measured and evaluated by comparison with calculated values of radiation treatment planning system (TPS). The values of TPS calculated were using Varian CLINAC21EX/Eclipse and TomoTherapy Planning System for constant irradiation time. The absorption dose was measured by placing a glass-element dosemeter in a human-bone enclosure phantom with a planning target volume inside the irradiation field. The organs at risk were the rectum, spinal cord, thyroid, eyeball and the left lung. The calculated values of TPS, Varian CLINAC21EX/Eclipse and TomoTherapy Planning System were calculated, up to 17 and 55 cm from the isocenter, respectively. The absorbed dose outside the irradiation field diverged with increased distance from the isocenter (Varian/Eclipse:p= 0.03, TomoTherapy Planning System:p= 0.25). The calculated values for the absorbed dose outside the irradiation field were underestimated.