Non-Standard Use of TomoTherapy Exit Imaging Detectors for Quality Assurance Procedures
Non-Standard Use of TomoTherapy Exit Imaging Detectors for Quality Assurance Procedures
复制标题
非标准使用 TomoTherapy 出口成像探测器进行质量保证程序
DOI：
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发表时间：
2021
影响因子：
0.3
通讯作者：
A. Nechesnyuk
中科院分区：
文献类型：
--
作者：
D. Tovmasian;A. Loginova;A. Chernyaev;A. Nechesnyuk
断层治疗设备上的放射治疗计划的验证通常通过将体模中的测量剂量分布与断层治疗计划系统的计算剂量进行比较来执行。然而，可以测量的点的数量是有限的，并且验证过程的时间超过了患者治疗的时间。同时，机器的出口检测器具有在整个辐照时间内测量输出辐射通量的能力，它们具有高空间分辨率，并且不需要额外的安装工作。本文开发了一种方法，用于处理断层治疗出口探测器的数据，并将其与计划系统的数据进行比较。在MATLAB中创建了一个应用程序，可处理2种类型的数据：计划系统中DICOM格式的放射治疗计划和出口探测器的原始数据。通过考虑校正因素，如背景辐射，探测器的形状，相邻叶片的影响，和叶通道的关系，开发了一种方法，用于产生的数据到一个单一的视图。可以使用二维伽马指数来比较两组数据。创建的方法将使放射治疗计划的验证更加准确和容易，并且在未来，它可以帮助评估剂量输送的准确性和治疗期间患者定位的准确性。
Verification of radiation therapy plans on the TomoTherapy device is generally performed by comparing the measured dose distribution in the phantom with the calculated dose from the TomoTherapy planning system. However, the number of points at which measurement is possible is limited, and the time of the verification procedure exceeds the time of the patient treatment. At the same time, the exit detectors of the machine have the ability to measure the output radiation fluence throughout the entire irradiation time, they have a high spatial resolution, and do not require additional installation efforts. The article develops a method for processing data from the exit detectors of TomoTherapy and for comparing them with data from the planning system. An application has been created in the MATLAB that processes 2 types of data: a radiation therapy plan in DICOM format from the planning system and raw data from the exit detectors. A method for resulting the data to a single view is developed by taking into account correction factors, such as background radiation, the shape of the detector, the influence of neighboring leaves, and the leaf-channel relationship. It is possible to compare two sets of data using a two-dimensional gamma index. The created method will make the verification of radiation therapy plans more accurate and easier, and in the future, it can help evaluate the accuracy of dose delivery and the accuracy of patient positioning during treatment.
影响因子：
3.8
作者：
MACKIE, TR;HOLMES, T;KINSELLA, T
通讯作者：
KINSELLA, T