Geoffrey Johnson, MD

Geoffrey B. Johnson, M.D., Ph.D., is a Professor of Radiology, is board-certified in Radiology and Nuclear Medicine and recently rotated out of an 8-year tenure as Chair of Nuclear Medicine at Mayo Clinic. Under his leadership, Mayo Clinic in Rochester MN has become the largest theranostic center in the world, averaging 40 therapies per week for 2023. Dr. Johnson now serves as Associate Director of the Mayo Clinic Comprehensive Cancer Center (MCCCC) and as Chair of Radiopharmaceutical Therapy. Dr. Johnson is founder and Chief Scientific Officer of Nucleus RadioPharma, a CDMO for radiopharmaceutical development, production, and delivery. Dr. Johnson was the top-recruiting physician in the MCCCC in 2022 and has enrolled over 140 patients on radiopharmaceutical cancer therapy trials in the last 3 years, serving as overall PI and local PI. He also serves as Co-PI on multiple active theranostic trials. Dr. Johnson is a co-inventor of Alpha-PET Double-L.E.T. theranostic technologies, the first of which is now licensed to Perspective Therapeutics. Dr. Johnson served as Medical Director of the Nuclear Medicine Technology Program, Program Director of the Nuclear Radiology Fellowship Program and Chair of PET/MR research and development committee. Dr. Johnson earned his B.S. in chemical engineering at the Massachusetts Institute of Technology, receiving Tau Beta Phi academic honors. He completed his M.D./Ph.D. in the Mayo Medical-Scientist Training Program as the Davis Physician-Scientist Scholar. He completed postdoctoral training in immunology and surgery in the Mayo Graduate School. He went on to complete an internship in internal medicine, a residency in diagnostic radiology and a fellowship in nuclear radiology in Mayo School of Graduate Medical Education. In recognition of his work, Dr. Johnson has received awards and honors, including the Roentgen Resident Research Award and the twice the Honored Educator Award, conferred by the Radiological Society of North America; Physician/Scientist of the Year, conferred by Mayo School of Health Sciences; and the Carman Award for Excellence in Clinical Practice, conferred by the Department of Radiology, Mayo Clinic. Dr. Johnson is active in research and education, garnering more than 30 awards with trainees on projects at national and international meetings. Dr. Johnson’s memberships with 13 professional organizations include the AAI, ACR, ABR, ARRS, RSNA, ASNC, SNMMI and STR.

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