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首页> 外文期刊>The European physical journal. Applied physics >In vivo dosimetry for head and neck carcinoma: Determination of target absorbed dose from entrance and exit absorbed dose measurements
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In vivo dosimetry for head and neck carcinoma: Determination of target absorbed dose from entrance and exit absorbed dose measurements

机译：头颈癌的体内剂量测定法：根据入口和出口吸收剂量测量值确定目标吸收剂量

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摘要

The aims of this work were to measure the entrance and exit dose for patient treated for head and neck tumors. The target absorbed dose was determined from the exit and entrance dose measurement. Twenty patients were evaluated. The results were compared to the calculated values and the midline dose was determinate and compared with the prescribed dose. 80 entrance doses and 80 exit doses measurements were performed. The average difference from expected values was 1.93% for entrance dose (SD 1.92%) and -0.34% for exit dose (SD 4.1%). The target absorbed dose differed from prescribed dose values by 2.94% (1.97%) for the results using the No?l method and 3.34% (SD: 2.29%) with the Rizzotti method. The total uncertainty budget in the measurement of the absorbed entrance and exit dose with diode, including diode reading, correction factors and diode calibration coefficient, is determined as 3.02% (1 s). Simple in vivo dose measurements are an additional safeguard against major setup errors and calculation or transcription errors that were missed during pre-treatment chart check.
机译：这项工作的目的是测量接受头颈部肿瘤治疗的患者的出入剂量。从出口和入口剂量测量确定目标吸收剂量。评价了20名患者。将结果与计算值进行比较，确定中线剂量并将其与处方剂量进行比较。进行了80次进入剂量和80次退出剂量测量。与预期值的平均差异是，入场剂量为1.93％（标准差1.92％），出院剂量为-0.34％（标准差4.1％）。使用No？l方法的目标吸收剂量与规定的剂量值相差2.94％（1.97％），而使用Rizzotti方法的结果为3.34％（SD：2.29％）。确定二极管吸收的入射和出口剂量的总不确定度预算，包括二极管读数，校正因子和二极管校准系数，确定为3.02％（1 s）。简单的体内剂量测量是针对主要设置错误以及在预处理图表检查期间遗漏的计算或转录错误的另一种保护措施。

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