Christian Velten, MSc, DABR

Christian is a practicing medical physicist at Montefiore Medical Center with an appointment at Albert Einstein College of Medicine, both in New York, NY. He studied physics at the RWTH Aachen University and Technical University of Munich with a focus on experimental nuclear and particle physics. After graduating he worked at the research reactor FRM-II in Garching near Munich on Monte Carlo simulations for fast neutron radiography.

After studying Medical Physics at Columbia University, he became a resident physicist at Montefiore Medical Center, where he is now serving as site-lead brachytherapy physicist and radiosurgery physicist. In addition to his clinical duties, he focuses on computational physics for data analysis, radiation interaction simulations and modeling. He is pursuing a part-time PhD in medical physics with the Technical University of Dresden on the simulation of radiation interactions with nanoparticles, focusing on developing new methods to characterize the chemical stage after water radiolysis.

Prof Vladimir Feygelman, PhD

Vladimir M. Feygelman graduated from the Department of Physics at Rostov State University in the former U.S.S.R in 1982 with a degree in Laser Physics. In 1985 he was awarded a PhD in Physical Chemistry at the same university. Since 1990 Dr. Feygelman is involved in Medical Physics, first as a Post Doc at the University of Florida (Gainesville), and then as a clinical radiotherapy physicist in Canada and USA. In 2006 he joined the faculty of Moffitt Cancer Center. Currently he is a Senior Faculty Member at Moffitt and Professor at USF Department of Oncologic Sciences. Dr. Feygelman divides his time between clinical duties, research, and teaching physics PhD students and medical residents. His research interests are primarily focused on quality assurance of complex advanced treatments and precision automated treatment planning for conventional and adaptive therapy.

Dr. Benjamin Clasie, PhD

Dr. Benjamin Clasie joined MGH in 2006 and worked on projects including the installation of the compact and modular Gordon-Browne Proton Therapy Center and pencil beam scanning development.  He is ABR-board certified (2013).    Prior to MGH, he completed his PhD in experimental nuclear physics at the Massachusetts Institute of Technology (2006) and BSc at the University of Wollongong (UOW) (1998).  While at the UOW, he worked on projects including simulations of silicon-on-insulator detectors at the Center for Medical Radiation Physics (CMRP).

Prof Sam Beddar, PhD

Sam Beddar is a tenured full professor at the University of Texas MD Anderson Cancer Center, Houston, Texas in the Division of Radiation Oncology, adjunct professor in the Department of physics, physics engineering and optics at The Université Laval and adjunct professor in the Department of Medical Physics at The University of Wisconsin School of Medicine, Madison, Wisconsin. He is the Director of Clinical Research in the Department of Radiation Physics within the Division of Radiation Oncology.


He has been the clinical chief of the Gastrointestinal (GI) Service from 2005 to 2020, focusing his clinical attention on developing, SPECT, 4D-CT with and without intravenous contrast for the liver, respiratory-gated modalities and SBRT techniques for GI cancers. He has been the Director of the intraoperative radiation therapy program at MDACC since 2005.


Dr. Beddar has served on many National Institutes of Health study section review panels and has been a PI of numerous NIH/NCI grant awards as well as industrial grants. His laboratory research is actively engaged in the rapidly growing field of scintillation dosimetry and the use of scintillating materials to measure radiation dose. His work ranges from basic research on scintillator properties to detector development, clinical applications, and commercialization.  Dr. Beddar’s lab is currently using scintillation detectors to perform in vivo dosimetry external beam radiation therapy, brachytherapy and proton therapy. His research activities contributed to the EXRADIN W1 and W2 commercial systems from Standard Imaging, Inc and the HyperScint commercial systems from Medscint, Inc. Recently his lab is focusing on the 3D dose imaging of proton beams, prompt gamma imaging and proton CT and radiography. He has authored more than 200 peer reviewed publications and 10 patents.

Prof Stefan Both, PhD

Stefan Both received his PhD degree from the Babes-Bolyai University, in 2005. His Physicist career started at the Kiricuta Oncology Institute, Romania, in 1996. He immigrated to the US in 2000 and worked in private and academic radiation oncology. In 2008, Dr Both became a faculty member at the University of Pennsylvania, Philadelphia, where he was able to advance treatment programs in conventional radiotherapy, establish and lead the physics residency programs, and spearhead technical advances, including proton therapy. In 2015, he joined Memorial SloanKettering Cancer Center, New York, as an Associate Attending and Lead Physicist. Currently, Dr. Both is the Professor and Head of Medical Physics and Instrumentation in the Department of Radiation Oncology at the Groningen University Medical Center, Netherlands. He is board certified by the American Board of Radiology in Therapeutic Radiological Physics, a Fellow of the American Association of Physicists in Medicine and an Extraordinary Member of the Dutch Medical Physics Society. He serves on committees of the American Association of Physicists in Medicine, Particle Therapy Co-Operative Group, Commission on Accreditation of Medical Physics Programs and American Board of Radiology. Dr. Both has been an invited speaker and committee member at conferences, published over 70 papers in peer reviewed journals, has more than 140 conference contributions, participates to editorial and advisory boards and edited and coauthored books. His main research interests are advanced treatment planning, motion and range uncertainty management, biological guided adaptive radiotherapy and atomization in proton therapy.

Prof Valentin Djonov, MD

After several years in neuro- and general surgery, in 1992 V. Djonov entered a research position in the Department of Clinical Research at the University of Bern, Switzerland.
In 1996 he became a research assistant in the Division of Developmental Biology within the Institute of Anatomy, Bern. This was followed by his habilitation (assistant professorship) in 2002 followed by associate professor in 2006 at the same institute.
In September 2007, V. Djonov was promoted to full professor and became co-director of the Institute of Anatomy in Fribourg, Switzerland. After a period of 3 years, he returned to Berne where he is currently the director of the Institute of Anatomy.

The main scientific interest of his group is the radio-biological effects induced by Microbeam Radiation Therapy (MRT). MRT is a preclinical radiotherapy technique using spatially fractionated X-rays to produce alternating regions of high and low dose deposition in the target tissue. This results in unique radiation/tissue interactions that expands the therapeutic index of radiation therapy by increasing tumor control, including that of radioresistant malignancies, while simultaneously exhibiting remarkable normal tissue sparing even when delivering peak doses of hundreds of Grays.

This “MRT effect” appears to be governed by a new radiobiological paradigm characterized by several novel mechanisms that contribute to treatment success: (i) MRT acts as a very potent angiodisruptive and anti-angiogenic agent resulting in reduced blood supply to irradiated tumors (ii) these disrupted tumor vessels serve as a gateway for circulating immune cells to invade MRT-irradiated tumor tissue, and enhance anti-tumor immune responses (iii) this MRT-induced immune effect is characterized by a specific gene signature that implicates myeloid cell recruitment and interferon responses as key mediators of this anti-tumor response.

These unique features support the clinical translation of MRT as a novel therapeutic approach for the treatment of inoperable, radioresistant lesions.

Prof Katia Parodi, PhD

Katia Parodi received her Ph.D. in Physics from the University of Dresden, Germany, in 2004. She then worked as postdoctoral fellow at Massachusetts General Hospital and Harvard Medical School in Boston, USA. In 2006 she returned to Germany as tenured scientist and group leader at the Heidelberg Ion Therapy Center, obtaining in 2009 her Habilitation from the Heidelberg University. Since 2012 she is full professor and Chair of Medical Physics at the Physics Faculty of the Ludwig-MaximiliansUniversity (LMU) in Munich, where she initiated a dedicated curriculum for Medical Physics within the Physics MSc. She also retained a secondary affiliation with the Heidelberg Ion Therapy Center. Her main research interests are in high precision image-guided radiotherapy with a special focus on ion beams, from advanced computational modeling to experimental developments and clinical evaluation of novel methods for in-vivo ion range monitoring. Katia Parodi has been invited speaker and committee member at many conferences, and contributed to over 90 publications in peer reviewed journals, more than 150 conference contributions, 5 book chapters and a couple of patents. For her work she received several national and international recognitions, including the Behnken Berger Award in 2006, the IEEE Bruce Hasegawa Young Investigator Medical Imaging Science Award in 2009 and the AAPM John S. Laughlin Young Scientist in 2015. Since 2015 she is also vice president of the German Society for Medical Physics (DGMP).

Dr Francesco Romano, PhD

Dr Francesco Romano is Researcher at the Italian National Institute for Nuclear Physics (INFN). His expertise is on radiation dosimetry and Monte Carlo simulations for medical applications.

He received from University of Catania (Italy) his PhD in Physics in 2010 and his Medical Physics Certification in 2015. He has been working for about ten years at the INFN Southern Laboratory in Catania, coordinating the research activities of two research beam lines, respectively dedicated to proton and ion therapy experimental investigations, also supporting the User’s experiments. He was also responsible for the design and realization of the in-air final section of a laser-driven proton beam line for medical applications and the installed dosimetric systems.

He moved in 2017 to the United Kingdom, working for almost three years as a Senior Researcher at the National Physical Laboratory in London, which is the UK National Metrology Institute. He have been working here on novel dosimetry developments for proton therapy and FLASH radiotherapy. He came back to Italy three years later working at INFN Catania Division, where he is currently carrying on his research activity on ion beam microdosimetry and dosimetry for hadron therapy and FLASH radiotherapy. He is Honorary Lecturer at the Queen’s University of Belfast and University of Surrey in the UK. He is member of the International Geant4 Collaboration and of the Editorial Board of the Applied Physics Journal. He is Reviewer for different Journals in the Medical Physics field and member of the Scientific Committee of several Conferences and International Schools. He is among the proponents of the “UHDpulse” EMPIR joint research project, for dosimetry of ultra-high pulse dose rate beams, and of the INFN FRIDA project for FLASH radiotherapy.



Prof Paul Sellin, PhD

Paul Sellin is a Professor of Physics at the University of Surrey in the UK, and a visiting Professor at the University of Wollongong. His research interests are in the development and characterisation of radiation detectors and detector materials for applications in medical physics, radiation imaging, and nuclear security. His research group focuses on the characterisation and development of new detector materials, with a particular emphasis on the application of perovskite and organic materials for radiation detection and dosimetry.

Dr Nicolas Depauw, PhD

Born in France, Nicolas completed a Master-equivalent program in general engineering and computer sciences at the E.S.E.O. in Angers. During his final year of studies, he completed a double-diploma program and obtained his master’s degree in Medical Radiation Physics at the University of Wollongong (UoW), Australia. In 2008, Nicolas moved to Boston, MA, USA where he joined the Massachusetts General Hospital (MGH) to work in proton therapy. In 2011, he re-enrolled in parallel at UoW in a Ph.D program which he completed in 2015. ABR-board certified in 2013, Nicolas is now a clinical medical physicist, lead in proton treatment planning at MGH.