David Tischfield is a Nuclear Radiology Fellow at the University of Pennsylvania, soon to transition into the role of Assistant Professor in the Department of Radiology's Nuclear Medicine Division in July 2024. Having completed his MD/PhD, diagnostic radiology residency, and nuclear radiology fellowship at the same institution, David has been a valuable member of the PIGI lab since 2017. His contributions include the development of patient-derived xenograft (PDX) models of hepatocellular carcinoma (HCC), the characterization of the tumor immune microenvironment following locoregional therapy, and the use of metabolic imaging to explore metabolic vulnerabilities in HCC for improved diagnostic imaging paradigms.