Rakvongthai Yothin, El Fakhri Georges
Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand.
Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
PET Clin. 2017 Jul;12(3):321-327. doi: 10.1016/j.cpet.2017.02.004.
Motion degrades image quality and quantitation of PET images, and is an obstacle to quantitative PET imaging. Simultaneous PET-MR offers a tool that can be used for correcting the motion in PET images by using anatomic information from MR imaging acquired concurrently. Motion correction can be performed by transforming a set of reconstructed PET images into the same frame or by incorporating the transformation into the system model and reconstructing the motion-corrected image. Several phantom and patient studies have validated that MR-based motion correction strategies have great promise for quantitative PET imaging in simultaneous PET-MR.
运动降低了PET图像的质量和定量分析能力，是定量PET成像的一个障碍。同时进行的PET-MR提供了一种工具，可通过使用同时采集的MR成像的解剖学信息来校正PET图像中的运动。运动校正可以通过将一组重建的PET图像变换到同一帧来实现，或者通过将该变换纳入系统模型并重建运动校正图像来实现。多项体模和患者研究已经证实，基于MR的运动校正策略在同时进行的PET-MR定量PET成像中具有很大的前景。
