This issue of MRI Clinics of North America focuses on Imaging of the PET/MR Imaging, and articles will include: Principles of PET/MR Imaging; Attenuation Correction of PET/MR Imaging; MR-Derived Improvements in PET Imaging; Neurological Applications of PET/MR; Oncological Applications of PET/MR Imaging on the Head and Neck; Oncological Applications of PET/MR Imaging on GYN/GU; PET/MR Imaging of Multiple Myeloma; Pediatric Nuances of PET/MR Imaging; Cardiac Applications of PET/MR Imaging; Logistics and Practical Considerations of MR Coils for PET/MR; Integration of PET/MR Hybrid Imaging into Radiation Therapy Treatment; Practical Clinical Considerations of PET/MR; Incremental value of FDG PET/MR in Assessment of Rectal Cancer, and more