von Schulthess Gustav K, Veit-Haibach Patrick
Department of Medical Radiology, University Hospital, Zurich, Switzerland.
Department of Medical Radiology, University Hospital, Zurich, Switzerland
J Nucl Med. 2014 Jun 1;55(Supplement 2):19S-24S. doi: 10.2967/jnumed.113.129239. Epub 2014 May 1.
Many groups attempt to optimize imaging protocols on PET/MR imaging systems. Although research protocols may take as long as 60-90 min, much more efficient clinical workflows are needed to achieve cost-effective examination times of less than 1 h. Considering these difficulties, simultaneous PET/MR imaging is an intriguing research tool, but its clinical applications are uncertain or just beginning to emerge. However, unlike PET/CT, in which the options for various CT protocols are limited, the MR imaging portion of PET/MR imaging can be extended arbitrarily depending on the MR pulse sequences chosen. For PET/MR imaging to be complementary, feasible, and somewhat competitive with PET/CT, image acquisition times should ideally be limited to 30 min. The purposes of this article are to help the reader to understand the critical workflow issues in simultaneous PET/MR imaging in comparison with sequential PET/MR imaging and to learn how to optimize an imaging examination. Current knowledge toward this goal is summarized.
许多研究团队致力于优化PET/MR成像系统的成像方案。尽管研究方案可能耗时60 - 90分钟，但为了实现成本效益高且检查时间少于1小时的目标，需要更高效的临床工作流程。考虑到这些困难，同时进行的PET/MR成像是一种引人关注的研究工具，但其临床应用尚不确定或刚刚开始出现。然而，与PET/CT不同，PET/CT中各种CT方案的选择有限，而PET/MR成像的磁共振成像部分可以根据所选的磁共振脉冲序列任意扩展。为了使PET/MR成像具有互补性、可行性，并在一定程度上与PET/CT竞争，理想情况下图像采集时间应限制在30分钟以内。本文的目的是帮助读者理解与序贯PET/MR成像相比，同时进行PET/MR成像中的关键工作流程问题，并学习如何优化成像检查。总结了目前在这一目标方面的知识。
