Simultaneous positron emission tomography and MRI (PET/MRI) is a technology that combines the anatomic and quantitative strengths of MR imaging with physiologic information obtained from PET. PET and computed tomography (PET/CT) performed in a single scanning session is an established technology already in widespread and accepted use worldwide. Given the higher cost and complexity of operating and interpreting the studies obtained on a PET/MRI system, there has been question as to which patients would benefit most from imaging with PET/MRI versus PET/CT. In this article, we compare PET/MRI with PET/CT, detail the applications for which PET/MRI has shown promise and discuss impediments to future adoption. It is our hope that future work will prove the benefit of PET/MRI to specific groups of patients, initially those in which PET/CT and MRI are already performed, leveraging simultaneity and allowing for greater degrees of multiparametric evaluation. LEVEL OF EVIDENCE 5 Technical Efficacy: Stage 5 J. Magn. Reson. Imaging 2017;46:1247-1262.

中文翻译：

---

PET / MRI：在哪里可以代替PET / CT？

同时进行正电子发射断层扫描和MRI（PET / MRI）是一项将MR成像的解剖学和定量强度与从PET获得的生理信息相结合的技术。在一次扫描中执行的PET和计算机断层扫描（PET / CT）是一项已确立的技术，已在全球范围内广泛使用。鉴于操作和解释在PET / MRI系统上获得的研究需要较高的成本和复杂性，因此存在一个问题，即哪些患者将从PET / MRI成像中受益最大，而与PET / CT相比则受益最大。在本文中，我们将PET / MRI与PET / CT进行了比较，详细介绍了PET / MRI已显示出希望的应用，并讨论了未来采用的障碍。我们希望未来的工作将证明PET / MRI对特定患者群体的益处，最初，那些已经执行了PET / CT和MRI的程序，同时利用了同步性并允许进行更大程度的多参数评估。证据级别5技术效力：第5阶段。雷森 成像2017; 46：1247-1262。