Peter G. Maxim
Biography
Peter G. Maxim, Ph.D., is Professor and Vice Chair of Medical Physics in the Department of Radiation Oncology at the University of California, Irvine School of Medicine, where he also serves as Director of the Medical Physics Residency Program and holds a faculty appointment at the Chao Family Comprehensive Cancer Center. He received his Ph.D. in Biophysics from Humboldt University in Berlin, Germany, completed postdoctoral training at Stanford University School of Medicine, and is board certified in Therapeutic Radiological Physics by the American Board of Radiology. Prior to joining UCI, he held faculty appointments at Stanford University School of Medicine for over a decade and at Indiana University School of Medicine.
Maxim's research focuses on two areas: FLASH radiotherapy—the delivery of radiation at ultra-high dose rates—and novel radiotherapy delivery systems. He is a co-inventor on patents for the Pluridirectional High-energy Agile Scanning Electron Radiotherapy (PHASER) system, a platform designed to translate FLASH radiotherapy into clinical practice. He has served as principal investigator or co-investigator on multiple extramural grants from the National Institutes of Health, the Department of Defense, and private foundations supporting this research. He is a member of the NCI-organized Grid, Lattice, and FLASH work group and the AAPM Task Group 359 on FLASH ultra-high dose rate radiation dosimetry. His work has resulted in more than 113 peer-reviewed publications and two book chapters.
Maxim has been an active contributor to the professional community, serving on the Investment Advisory Board of the American Association of Physicists in Medicine (AAPM) since 2012 and as Medical Physics Co-Chair for Radiation Therapy Oncology Group (RTOG) trial 1008. He has been a frequent invited speaker at national and international conferences, including the annual meetings of ASTRO, AAPM, and the Radiation Research Society, addressing topics in FLASH radiotherapy and advanced treatment delivery. He received the Henry S. Kaplan Memorial Prize for Teaching in Radiation Oncology from Stanford University in 2013.
Return to topEducation
- B.S. in Physics, Technical University, Berlin, Germany, 1994
- M.Sc. in Physics, Technical University, Berlin, Germany, 1997
- Ph.D. (Dr. rer. nat.) in Biophysics, Humboldt University, Berlin, Germany, 2003
Distinctions
- Teacher of the Year Award – Association of Residents in Radiation Oncology (ARRO), 2009
- Best in Physics – Therapy Award, AAPM 56th Annual Meeting, 2014
- NaFöG (Nachwuchs Förderungs Gesetz, Germany) Young Investigator Fellowship, 1998
- DAAD (German Academic Exchange Program) Fellowship, 2000
- Henry S. Kaplan Memorial Prize for Teaching in Radiation Oncology, 2013
- Society of Molecular Imaging - Young Investigator Travel Scholarship, 2004
- Stanford Cancer Center – Orsak Innovation Fund, 2006
Areas of Expertise
- Radiation Oncology Medical Physics
- Stereotactic Ablative Radiotherapy
- 4D CT Motion Management
- PET Metabolic Tumor Imaging
- FLASH Ultra-High Dose Rate Therapy
- Very High Energy Electron Beams
- Pulmonary Nodule Ventilation Imaging
Recent Publications
- Wang J, Melemenidis S, Manjappa R, Viswanathan V, Ashraf RM, Levy K, Skinner LB, Soto LA, Chow S, Lau B, Ko RB, Graves EE, Yu AS, Bush KK, Surucu M, Rankin EB, Loo BW Jr., Schüler E, Maxim PG, “Dosimetric calibration of anatomy-specific ultra-high dose rate electron irradiation platform for preclinical FLASH radiobiology experiments” (opens in new tab), Medical Physics, vol. 51, pp. 9166-9178, 2024.
- Gutkin PM, Skinner L, Jiang A, Donaldson SS, Loo BW Jr., Oh J, Maxim PG, “Feasibility of the Audio-Visual Assisted Therapeutic Ambience in Radiotherapy (AVATAR) System for Anesthesia Avoidance in Pediatric Patients: A Multicenter Trial” (opens in new tab), International Journal of Radiation Oncology Biology Physics, vol. 117, no. 1, pp. 96-104, 2023.
- Barghouth G, Melemenidis S, Montay-Gruel P, Ollivier J, Viswanathan V, Jorge PJ, Maxim PG, “FLASH-RT does not affect chromosome translocations and junction structures beyond that of CONV-RT dose-rates” (opens in new tab), Radiotherapy and Oncology, vol. 188, pp. 109906, 2023.
- Wang J, Wang L, Maxim PG, Loo BW Jr, “An automated optimization strategy to design collimator geometry for small field radiation therapy systems” (opens in new tab), Physics in Medicine and Biology, vol. 66, no. 7, 2021.
Most Cited Publications
- Schüler E, Trovati S, King G, Lartey F, Rafat M, Villegas M, Praxel J, Loo BW, Maxim PG, “Experimental platform for ultra-high dose rate FLASH irradiation of small animals using a clinical linear accelerator” (opens in new tab), International Journal of Radiation Oncology Biology Physics, vol. 1, pp. 19516-203, 2016.
- Maxim PG, Tantawi SG, Loo BW Jr., “PHASER: A Platform for clinical translation of FLASH cancer radiotherapy” (opens in new tab), Radiotherapy and Oncology, vol. 139, pp. S0167-8140(19)30404-9, 2019.
- Schuler E, Acharya M, Montay-Gruel P, Loo BW Jr., Vozenin MC, Maxim PG, “Ultra-high dose rate electron beams and the FLASH effect: From preclinical evidence to a new radiotherapy paradigm” (opens in new tab), Medical Physics, vol. 49, no. 3, pp. 2082-2095, 2022.
- Schüler E, Eriksson K, Hynning E, Hancock SL, Hiniker SM, Bazalova-Carter M, Wong T, Le QT, Loo BW, Maxim PG, “Very high-energy electron (VHEE) beams in radiation therapy; Treatment plan comparison between VHEE, VMAT, and PBS” (opens in new tab), Medical Physics, vol. 44, no. 6, pp. 2544-2555, 2017.
- E. M. Cherry, P. G. Maxim, J. K. Eaton, “Particle size, magnetic field, and blood velocity effects on particle retention in magnetic drug targeting” (opens in new tab), Medical Physics, vol. 37, no. 1, pp. 175-182, 2010.
- Khan S, Maxime B, Wang J, Mnjappa R, Melemendis S, Breitkreutz D, Maxim PG, Xing L, Loo BW Jr., Pratx G, “Multicellular Spheroids as In Vitro Models of Oxygen Depletion During FLASH Irradiation” (opens in new tab), International Journal of Radiation Oncology Biology Physics, vol. 110, no. 3, pp. 833-844, 2021.
- Palma B, Bazalova-Carter M, Hårdemark B, Hynning E, Qu B, Loo BW, Maxim PG, “Assessment of the quality of very high-energy electron radiotherapy planning” (opens in new tab), Radiotherapy and Oncology, vol. 119, no. 1, pp. 154-8, 2016.
- Maxim PG, Keall P, Cai J, “FLASH Radiotherapy: Newsflash of FLASH in The Pan” (opens in new tab), Medical Physics, vol. 46, pp. 4287-4290, 2019.
- P. G. Maxim, H. Shirazi, B. Thorndyke, B. W. Loo, G. Luxton, Q. Le, “Quantification of Motion for Different Thoracic Locations using 4DCT; Implications for Radiation Treatment Planning” (opens in new tab), International Journal of Radiation Oncology Biology Physics, vol. 69, no. 5, pp. 1395-1401, 2007.
- C. R. King, P. G. Maxim, A. Hsu, D. S. Kapp, “Incidental Testicular Irradiation from Prostate IMRT: It All Adds Up” (opens in new tab), International Journal of Radiation Oncology Biology Physics, vol. 77, no. 2, pp. 484-489, 2010.
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Last updated on 9/10/2026.