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Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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May 2026
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Nuclear Science and Engineering
June 2026
Nuclear Technology
Fusion Science and Technology
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Reimagining nuclear materials for the future of medicine
Nuclear medicine has come a long way since Henri Becquerel first observed the penetrating energy of radioactive materials in 1896. Today, technetium-99m alone is used in more than 40 million diagnostic procedures every year—from cardiovascular imaging and bone scans to cancer detection—making it the undisputed workhorse of nuclear medicine. That single statistic tells you something important: An enormous portion of modern diagnostic medicine rests on a surprisingly narrow foundation, one built around a small number of aging research reactors that were never originally designed for continuous isotope production.
Director of Fusion Energy Technologies
General Atomics
Brian Grierson serves as the Director of Fusion Energy Technologies at General Atomics, where he oversees Fusion Systems Integration, RF Systems, Diagnostics Development, and Engineering Research & Innovation within the Energy Group. In this role, he leads multidisciplinary teams advancing the critical technologies and integrated systems needed to support the development of practical fusion energy solutions and related applications.
Prior to joining General Atomics, Dr. Grierson spent more than a decade at the Princeton Plasma Physics Laboratory, where he held leadership positions including Division Head and Principal Research Physicist, contributing to domestic and international magnetic fusion energy research. He earned his Ph.D. in Applied Physics and Applied Mathematics with Distinction from Columbia University.
Dr. Grierson’s work focuses on advancing fusion energy through system integration, technology development, and the translation of scientific innovation into real-world energy applications.
