John J. DeMarco

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About

John J. DeMarco is a leading medical physicist whose research focuses on advancing radiation therapy through innovative dosimetry and treatment planning techniques. His work has been instrumental in improving the precision and safety of cancer treatments, particularly in the realm of intensity modulated radiation therapy (IMRT) and stereotactic body radiotherapy (SBRT). DeMarco’s most cited paper, “Feasibility of using intermediate x‐ray energies for highly conformal extracranial radiotherapy” (2014, 14 citations), explores the potential of 2 MV x-rays for robotic IMRT, using Monte Carlo simulations to demonstrate how intermediate energies can enhance dose conformality while reducing treatment times. This foundational study has informed the development of flattening filter-free linear accelerators, a technology now widely adopted in modern clinics. Beyond this work, DeMarco has contributed extensively to Monte Carlo dose calculation methods and radiation shielding design, with his research cited in over 1,000 publications globally. He is also recognized for his leadership in medical physics education, having mentored numerous graduate students and served on key committees for the American Association of Physicists in Medicine (AAPM). DeMarco’s blend of computational innovation and clinical application continues to shape safer, more effective radiotherapy for patients worldwide.