Department of Radiation Oncology, Miami Cancer Institute, 8900 North Kendall Drive, Miami, FL 33176, USA.
Department of Radiation Oncology, Moffitt Cancer Center, 12902 USF Magnolia Drive, Tampa, FL 33612, USA.
Surg Oncol Clin N Am. 2023 Jul;32(3):599-615. doi: 10.1016/j.soc.2023.02.008. Epub 2023 Apr 4.
Image guidance for radiation therapy (RT) has evolved over the last few decades and now is routinely performed using cone-beam computerized tomography (CBCT). Conventional linear accelerators (LINACs) that use CBCT have limited soft tissue contrast, are not able to image the patient's internal anatomy during treatment delivery, and most are not capable of online adaptive replanning. RT delivery systems that use MRI have become available within the last several years and address many of the imaging limitations of conventional LINACs. Herein, the authors review the technical characteristics and advantages of MRI-guided RT as well as emerging clinical outcomes.
图像引导放射治疗（RT）在过去几十年中不断发展，现在通常使用锥形束计算机断层扫描（CBCT）进行。使用 CBCT 的传统直线加速器（LINAC）软组织对比度有限，无法在治疗过程中对患者的内部解剖结构进行成像，而且大多数 LINAC 都不具备在线自适应重新规划的能力。在过去几年中，出现了一些使用 MRI 的 RT 输送系统，这些系统解决了传统 LINAC 成像方面的许多限制。本文作者综述了 MRI 引导 RT 的技术特点和优势以及新出现的临床结果。
