Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA.
Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA.
Semin Radiat Oncol. 2018 Jun;28(3):185-193. doi: 10.1016/j.semradonc.2018.02.003.
Optical surface imaging is a nonradiographic, noninvasive technology for continuous localization of patients during radiation therapy. Surface-guided radiation therapy (SGRT) has been applied to many treatment sites including breast, intracranial, head and neck, and extremities. SGRT enables a reduction of initial setup variability, provides verification of immobilization continuously during treatment including at noncoplanar linac gantry angles, and provides dynamic surface information for use in gated and breath-hold treatment techniques, all of which can permit reductions in the margins required to account for target localization uncertainty. Ancillary benefits from surface imaging include the ability to use immobilization techniques that confer greater comfort to patients, a reduction in imaging dose through reduced radiographic localization requirements, and improvements to the speed, efficiency, and safety of clinical workflows. This review will describe the objectives of SGRT, review the commercially available surface imaging systems, and provide an overview of SGRT applications by treatment site. Limitations and future applications of surfacing imaging systems are also discussed.
光学表面成像技术是一种无放射性、非侵入性的技术，用于在放射治疗过程中连续定位患者。表面引导放射治疗（SGRT）已应用于许多治疗部位，包括乳房、颅内、头颈部和四肢。SGRT 可减少初始设置的可变性，在治疗过程中连续验证固定，包括在非共面直线加速器机架角度，提供动态表面信息，用于门控和屏气治疗技术，所有这些都可以减少为了考虑目标定位不确定性而需要的边缘。表面成像的辅助益处包括能够使用使患者更舒适的固定技术，通过减少放射定位要求来降低成像剂量，以及提高临床工作流程的速度、效率和安全性。本综述将描述 SGRT 的目标，回顾商业上可用的表面成像系统，并概述按治疗部位划分的 SGRT 应用。还讨论了表面成像系统的局限性和未来应用。
