This issue of PET Clinics focuses on Radiotracers, and is edited by Drs. Neil Vasdev and Abass Alavi. Articles will include: PET/CT detection of HER2-positive metastases in patients with 89Zr-DFO-trastuzumab; uPAR-PET with 68Ga-NOTA-AE105: first clinical experience with a novel PET ligand; 64Cu-FBP8: A fibrin-targeted probe for imaging of thrombus; Imaging of synaptic density in the brain via synaptic vesicle glycoprotein 2A (SV2A) with a novel biomarker...