Binding Specificity Test (IMAGE) Society of Nuclear Medicine and Molecular Imaging Caption Binding specificity test. (A) PET/CT axial views, autoradiographs, and corresponding H&E stainings of 10-micron cross-sections prepared from MI nonblocked, blocked, and sham-operated rats. Autoradiographs and H&E stainings from nonblocked hearts show increased Ga-68-FAPI-04 uptake in infarcted area at 7 days after MI, whereas uptake is negligible after sham operation or injection of nonlabeled FAPI-04 (blocked). Infarcted areas in H&E stainings are identified with arrows. (B) PET image-derived infarct-to-noninfarct uptake ratio (derived from 6 nonblocked and 3 blocked rat hearts subjected to coronary ligation). (C) Autoradiography image-derived infarct-to-noninfarct uptake ratio (derived from 3 nonblocked and 3 blocked MI hearts). QL = quantum level. Credit Z Varasteh and S Robu, Department of Nuclear Medicine, Klinikum rechts der Isar der TUM, Munich, Germany. Usage Restrictions Please give appropriate credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.