Van Dyk J
Med Phys. 1977 Mar-Apr;4(2):145-53. doi: 10.1118/1.594311.
An overall practical dosimetric study of a 10-MV photon beam produced by a Varian Clinac-18 linear accelerator is presented. In particular measurements were made to provide data which could be utilized in computerized dosage calculations using the concept of dividing the radiation beam into primary and scatter components. From the measured percentage depth doses, tissue-phantom ratios are calculated. Special consideration is given to the derivation and mesurement of zero-area tissue-phantom ratios such that scatter-phantom ratios could be obtained. The computer techniques were tested under a number of specified conditions by comparing the calculated results to the measured data. The variation of dose with field size and distance is considered and attenuation data for shielding, wedge and compensating materials is provided.
本文介绍了对Varian Clinac-18直线加速器产生的10兆伏光子束进行的总体实用剂量学研究。具体而言，进行了测量以提供数据，这些数据可用于利用将辐射束分为原发射线和散射线成分这一概念的计算机剂量计算。根据测量的百分深度剂量计算组织模体比。特别考虑了零面积组织模体比的推导和测量，以便能够获得散射线模体比。通过将计算结果与测量数据进行比较，在多种特定条件下对计算机技术进行了测试。考虑了剂量随射野大小和距离的变化，并提供了屏蔽、楔形和补偿材料的衰减数据。
