基于光学摆位系统的放疗定摆位体姿体态质控

Optical positioning system-based quality control for posture and body contour in radiotherapy positioning and setup

摘要

体姿体态的变化是放疗定摆位过程常见的误差来源，但是当前放疗定摆位设备种类繁多，原理各不相同，对于该过程精准性的判断较为困难。因此，采用联合定摆位的方式进行比较，并利用相应的质控平台对其准确性进行判断，对可能的误差原因进行溯源分析，对临床治疗具有重要意义。利用光学摆位系统可以实时获取摆位偏差的特点，本研究设计了一种放疗定摆位体姿体态质控方法，通过收集临床定摆位过程中的光学摆位系统数据，结合CT和CBCT图像，可以快速判断该过程的精准性以及体姿体态是否发生变化、辨别分析出误差产生的原因。在不同部位的病例情况下，本文方法都展现出良好的分析能力，能准确地发现问题，提升放疗质量。

Abstract

Variations in posture and body contour constitute common error sources during radiotherapy positioning and setup. However, there are various types of radiotherapy positioning and setup devices operating on different principles, making it difficult to accurately assess the positioning and setup precision. Therefore, it is of great significance for clinical treatment to compare combined positioning and setup methods, validate their accuracy using the corresponding quality control platforms, and trace the root causes of possible errors. By leveraging the capability of an optical positioning system to acquire positioning deviations in real time, a quality control method for posture and body contour in radiotherapy positioning and setup is proposed. Through the analysis of optical positioning system data collected during the clinical positioning and setup, and combined with CT and CBCT images, the proposed method can quickly assess positioning and setup precision, detect postural and contour variations, and identify and analyze the underlying causes of errors. The method exhibits strong analytical performance across various clinical cases and can accurately detect positioning and setup abnormalities, thereby improving radiotherapy quality.

关键词

放射治疗 / 定摆位 / 光学摆位系统 / 体姿 / 体态 / 质控

Key words

radiotherapy / positioning and setup / optical positioning system / posture / body contour / quality control

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基金资助

苏州市“科教兴卫”青年科技项目(KJXW2022029)

苏州市临床重点病种诊疗技术专项(LCZX202209)