Mohammadi Mohammad, Bezak Eva, Reich Paul
Department of Medical Physics, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
Appl Radiat Isot. 2008 Dec;66(12):1930-8. doi: 10.1016/j.apradiso.2008.04.024. Epub 2008 May 15.
The current work focuses on the verification of transmitted dose maps, measured using a scanning liquid ionization chamber-electronic portal imaging device (SLIC-EPID) for a typical step-and-shoot prostate IMRT treatment using an anthropomorphic phantom at anterior-posterior (A-P), and several non-zero gantry angles. The dose distributions measured using the SLIC-EPID were then compared with those calculated in the modelled EPID for each segment/subfield and also for the corresponding total fields using a gamma function algorithm with a distance to agreement and dose difference criteria of 2.54mm and 3%, respectively.
当前工作聚焦于对传输剂量图的验证，该剂量图是使用扫描液体电离室 - 电子射野影像装置（SLIC - EPID）针对典型的步进 - 射野前列腺调强放疗治疗在前后（A - P）方向以及几个非零机架角度下使用人体模型进行测量得到的。然后，使用距离一致性和剂量差异标准分别为2.54毫米和3%的伽马函数算法，将使用SLIC - EPID测量的剂量分布与在模拟的EPID中针对每个射野段/子野以及相应的总射野计算得到的剂量分布进行比较。
