用于PET-MR成像的基于磁共振的心脏和呼吸运动补偿技术
MR-Based Cardiac and Respiratory Motion-Compensation Techniques for PET-MR Imaging.
作者信息
Munoz Camila, Kolbitsch Christoph, Reader Andrew J, Marsden Paul, Schaeffter Tobias, Prieto Claudia
机构信息
Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
出版信息
PET Clin. 2016 Apr;11(2):179-91. doi: 10.1016/j.cpet.2015.09.004. Epub 2016 Jan 26.
Cardiac and respiratory motion cause image quality degradation in PET imaging, affecting diagnostic accuracy of the images. Whole-body simultaneous PET-MR scanners allow for using motion information estimated from MR images to correct PET data and produce motion-compensated PET images. This article reviews methods that have been proposed to estimate motion from MR images and different techniques to include this information in PET reconstruction, in order to overcome the problem of cardiac and respiratory motion in PET-MR imaging. MR-based motion correction techniques significantly increase lesion detectability and contrast, and also improve accuracy of uptake values in PET images.
心脏和呼吸运动导致PET成像中的图像质量下降，影响图像的诊断准确性。全身同步PET-MR扫描仪允许使用从MR图像估计的运动信息来校正PET数据并生成运动补偿的PET图像。本文综述了已提出的从MR图像估计运动的方法，以及将该信息纳入PET重建的不同技术，以克服PET-MR成像中的心脏和呼吸运动问题。基于MR的运动校正技术显著提高了病变的可检测性和对比度，还提高了PET图像中摄取值的准确性。
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