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New automatic quality control methods for geometrical treatment planning system tools in external conformal radiotherapy

机译:外部保形放疗中的几何治疗规划系统工具新的自动质量控制方法

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Quality control of external conformal radiotherapy treatment planning systems softwares is a crucial issue. The treatment quality depends directly on the quality of treatment planning systems (TPS). Radiotherapists need to be sure that softwares compute accurately each parameter of the treatment. This paper focuses on the quality control of geometrical tools of the treatment planning systems, i.e. the virtual simulation software. These TPS compute the geometrical part of the treatment. They define the targets and shapes of the irradiation beams. Four operations done by these TPS are examined in this work. The quality control of the auto-contouring, auto-margin, isocenter computation and collimator conformation tools is treated with a new method based on Digital Test Objects (DTO). Standard methods for this quality control have been set up from the development of some Physical Test Objects (PTO). These methods are time-consuming, incomplete and inaccurate. Results are biased by the CT-scanner acquisition of PTOs and error evaluation is done with the graphic tools of the TPS. Our method uses DTOs and allows for an automated qualitative error evaluation. DTOs present many advantages for TPS quality control.They lead to a fast, accurate, complete and automatic quality assessment. Special DTOs have been developed to control the TPS tools mentioned previously as well as their automatic result analysis methods. A TPS has been controlled with these test objects. The quality assessment shows some errors and highlights some particularities in the TPS tools functioning. This quality control was then compared with the standard quality control.
机译:外部保形放射治疗计划系统软件的质量控制是一个至关重要的问题。治疗质量直接取决于治疗计划系统(TPS)的质量。放射治疗师需要确保软件精确地计算治疗的每个参数。本文重点介绍了治疗计划系统的几何工具的质量控制,即虚拟仿真软件。这些TPS计算治疗的几何部分。它们定义了照射梁的目标和形状。在这项工作中检查了这些TPS完成的四项操作。基于数字测试对象(DTO)的新方法对自动轮廓,自动裕度,ISOcenter计算和准直器构象工具进行了质量控制。从某些物理测试对象(PTO)的开发,已经建立了这种质量控制的标准方法。这些方法是耗时的,不完整和不准确的。结果由PTO的CT扫描仪偏置,并使用TP的图形工具进行错误评估。我们的方法使用DTO并允许自动定性错误评估。 DTOS为TPS质量控制提供了许多优点。它们导致快速,准确,完善,质量自动评估。已经开发了特殊的DTO来控制先前提到的TPS工具以及其自动结果分析方法。通过这些测试对象控制了TPS。质量评估显示了一些错误,并突出了TPS工具功能中的一些特殊性。然后将该质量控制与标准质量控制进行比较。

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