Sanjiv Sam Gambhir (November 23, 1962 – July 18, 2020) was an American physician-scientist. He was the Virginia and D.K. Ludwig Professor in Cancer Research, Chairman of the Department of Radiology at Stanford University School of Medicine, and a professor by courtesy in the departments of Bioengineering and Materials Science and Engineering at Stanford University. Additionally, he served as the Director of the Molecular Imaging Program at Stanford (MIPS), Canary Center at Stanford for Cancer Early Detection and the Precision Health and Integrated Diagnostics Center (PHIND). He authored 680 publications and had over 40 patents pending or granted. His work was featured on the cover of over 25 journals including the Nature Series, Science, and Science Translational Medicine. He was on the ed