Youngho Seo is a Professor and Director of Nuclear Imaging Physics in the Department of Radiology and Biomedical Imaging, Program Director of MS in Biomedical Imaging graduate program, Faculty at the Bakar Computational Health Sciences Institute, Program Member of the Helen Diller Family Comprehensive Cancer Center at University of California, San Francisco (UCSF), Professor in the Department of Nuclear Engineering at UC, Berkeley, Faculty of UC Berkeley – UCSF Bioengineering Graduate Program, and Physicist Faculty Scientist at Lawrence Berkeley National Laboratory. He received his bachelor’s degree in Physics from KAIST where he investigated radiation effects on satellite-borne instruments by cosmic ray as his senior thesis research project. He completed a master’s degree in Physics at University of Alabama in Huntsville, focusing on modeling ion transport by soft-electron precipitation in high-latitude ionosphere. He spent one year at UC, Irvine as a medical physics graduate student before moving to UCLA where he obtained his second master’s degree and PhD in Physics with the dissertation on a dark matter experiment using dual-phase xenon. He spent another year for postdoctoral training at UCLA in experimental neutrino physics using liquid argon. Dr. Seo joined the UCSF Physics Research Laboratory (PRL) in 2003, and was trained in medical imaging physics before joining the faculty in 2006. Dr. Seo has been Director of UCSF PRL since 2008. His primary research focus is to use and develop quantitative ionizing radiation imaging tools for a broad range of biomedical applications. He published over 200 peer-reviewed journal manuscripts, most of which focus on quantitative imaging instrumentation development and applications. He was a recipient of Distinguished Investigator Award by Academy for Radiology & Biomedical Imaging Research in 2016. For IEEE NPSS, he was part of organizing committees of several IEEE NSS/MIC/RTSD conferences, and chair of Nuclear Medical and Imaging Sciences Council (NMISC) (2024-25).