Hill R F, Perez M D, Beckham W A
Cancer Therapy Centre, Liverpool Hospital, NSW.
Australas Phys Eng Sci Med. 1998 Jun;21(2):79-84.
With the increasing complexity of radiotherapy computer treatment planning systems (CTPS), verification of the treatments is an important component of a quality assurance program. The radiation dose delivered to a patient is based on treatment machine monitor units (MUs) that are calculated either using data tables or within the CTPS. An independent method for checking radiotherapy MU calculations is proposed. This method involves calculating the dose at a point (usually ICRU reference point) using the derived MUs and independently measured treatment data and comparing to the dose at the same point as predicted by the CTPS. A program was developed using Microsoft Excel to assist in performing this check. The program contains the beam data and various correction factors and calculates the dose after input of the treatment setup parameters. This independent method is used to check all radiotherapy treatment fields at Liverpool Hospital and has found a number of significant errors in the planning process and in the CTPS calculations.
随着放射治疗计算机治疗计划系统（CTPS）日益复杂，治疗验证成为质量保证计划的重要组成部分。输送给患者的辐射剂量基于治疗机器监测单位（MU），这些监测单位可通过数据表计算得出，也可在CTPS内计算得出。本文提出了一种用于检查放射治疗MU计算的独立方法。该方法包括使用导出的MU和独立测量的治疗数据计算某一点（通常为ICRU参考点）的剂量，并与CTPS预测的同一点剂量进行比较。利用Microsoft Excel开发了一个程序来协助进行此项检查。该程序包含射束数据和各种校正因子，并在输入治疗设置参数后计算剂量。这种独立方法用于检查利物浦医院的所有放射治疗野，并在计划过程和CTPS计算中发现了一些重大错误。
