Prof. Vincent Grégoire graduated with as a Medical Doctor (MD) in 1987 from the Université Catholique de Louvain in Belgium. He was board certified in Radiation Oncology in Belgium in 1994 and obtained his PhD in Radiation Biology in 1996 after a fellowship at the Netherlands Cancer Institute in Amsterdam (The Netherlands) and at MD Anderson Cancer Center in Houston, Texas (USA). Since his return from the USA, Prof. Grégoire was appointed at the Academic Hospital of the Catholic University of Louvain in Brussels, Belgium, where he was the Director of the Center for Molecular Imaging, Oncology and Radiotherapy, Full Professor in Radiation Oncology, and Head of Clinic in the Department of Radiation Oncology. From May 1, 2018, Prof. Grégoire is the Head of the Radiation Oncology Department at the Léon Bérard Cancer Center in Lyon, France. He coordinates the Head and Neck Oncology program where the publication of the consensus guidelines for selection and delineation of the target volumes brought him worldwide recognition. Beside his clinical activities, Vincent Grégoire has been running a translational research program on tumor microenvironment, on the integration of functional and molecular imaging for treatment planning, and on the molecular basis of increased radiosensitivity in HPV-infected cells. Vincent Grégoire has directed or co-directed 15 PhD theses and has authored or co-authored 254 peer-reviewed publications and 16 book chapters. He has delivered close to 850 abstract presentations, lectures or teaching seminars worldwide, including award lectures such as the IFHNOS KK Ang lecture in 2014 and the Blair Hesketh BAHNO Memorial Lecture in 2015. He is a member of the editorial board of Radiotherapy & Oncology and is a member of numerous scientific societies, including ASTRO and ESTRO, on which he serves on various committees. He has been the President of ESTRO from 2007 to 2009. Vincent Grégoire is the past Vice-President of the board of EORTC, past-Chairman of the Radiation Oncology Group of the EORTC and of the Head and Neck group of the EORTC. He was Co-Chairman of the ICRU Report Committee that published Prescribing, Recording, and Reporting Photon-Beam Intensity-Modulated Radiation Therapy (IMRT) (ICRU Report 83, 2010). In 2008 he was awarded the Honorary Fellowship of the British Royal College of Radiology, and in 2016 Honorary Fellow of the Irish College of Radiology. In 2014 he received the Breur Award from ESTRO and in 2015 he was awarded Honorary ESTRO Physicist. He received the Jens Overgaard legacy award from ESTRO. Prof. Grégoire was elected to the Commission in 2012 and was elected Chairman in 2018.

Roger W. Howell is a Professor of Radiology at Rutgers New Jersey Medical School (NJMS) where he serves as Chief of the Division of Radiation Research. Dr. Howell’s laboratory conducts research on dosimetry and radiobiology of internal radionuclides, with emphasis on the microscopic dose distributions encountered in nuclear medicine. He also studies the capacity of vitamins and other natural agents to protect reproductive organs, bone marrow, and the gastrointestinal tract against damage caused by ionizing radiation. These efforts have led to over one hundred publications in peer-reviewed journals. Dr. Howell teaches physics to radiology residents and provides educational lectures for emergency responders in New Jersey. He has served on review panels for federal agencies including NIH, DOE and other organizations. Dr. Howell is a member of the Medical Internal Radiation Dose (MIRD) Committee of the Society of Nuclear Medicine and Molecular Imaging, and he is a member of the US National Council on Radiation Protection and Measurements. He has served on several report committees of the International Commission on Radiation Units and Measurements (ICRU). Howell earned his bachelor and doctoral degrees in Physics from the University of Massachusetts, Amherst. Dr. Howell was elected to the Commission in 2014.

Pawel Olko graduated in physics from AGH University of Science and Technology, Krakow, Poland. Between 1986-1989 he was a fellow at the Institute for Medicine Nuclear Research Centre KFA Juelich, Germany. He received a Ph.D. in physics from the Institute of Nuclear Physics Krakow in 1990, habilitation in 2003 and the Polish state professorship title in 2010. In 1998-1999 he worked at Dosimetry and Medical Physics Section at IAEA in Vienna. Between 2005 and 2016 he was a scientific director at the Institute of Nuclear Physics Polish Academy of Sciences (IFJPAN) and between 2012-2016 director of the Bronowice Cyclotron Centre, the first proton therapy center in Poland. Since 2016 he is the head of the Division of Applied Physics at IFJPAN.

Dr. Olko’s main scientific interests and competence are microdosimetry, dosimetry, solid state detectors, radiation protection, medical physics and proton radiotherapy. He’s published more than 150 publications in international scientific journals. He was involved in activities of numerous national and international committees and organizations. Between 2004-2007 he was the Chair of the International Solid State Dosimetry Organization (ISSDO). Since 2002 he is a member of the EURADOS Council and since 2005 a member of the Article 31 Group of Experts, EC, Luxemburg. Dr. Olko was elected to the Commission in 2016.

Professor, Director of the Division of Biostatistics and Bioinformatics, Department of Epidemiology and Public Health, University of Maryland, and Director of the Biostatistics Shared Service, University of Maryland Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD

Søren M. Bentzen received a M.Sc. in physics and mathematics (1981), a Ph.D. in medical imaging (1986), and a D.M.Sc. in clinical radiobiology (1994), all from Aarhus University, Denmark. He has published more than 370 papers and book chapters, and has presented more than 300 invited lectures. He currently serves on 10 international cancer journal editorial boards. His research has been recognized by 24 awards and honors, including the ESTRO Breuer Gold Medal (2003), the MD Anderson Distinguished Alumnus Award (2008), and Honorary Life Memberships of the Association of Radiation Oncologists of India (2008) and the Belgian Society for Therapeutic Radiology and Oncology (2009). He held an Honorary Professorship at University College London (2000-2005); he is currently the Varian Visiting Professor to the Radiation Therapy Oncology Group (RTOG) and an Adjunct Professor of Radiobiology and Medical Physics, University of Copenhagen. His previous appointments include MD Anderson Cancer Center (1987-1988), Danish Cancer Society/Aarhus University (1988-1997), Gray Laboratory/Mount Vernon Hospital, London (1998-2004), and University of Wisconsin School of Medicine and Public Health (2005-2013). His main research interests include late effects of radiotherapy; clinical radiobiology; integration of data from genomics, proteomics, and molecular imaging into novel radiation-therapy strategies; bioeffect modeling; biomathematics; biostatistics; clinical trial design; and evidence-based medicine. He was elected to the Commission in 2010 and to the Board of Directors in 2013.

Prof. Hiroki Shirato graduated from Hokkaido University School of Medicine in Sapporo Japan in 1981. He was board certified in Radiation Oncology in Japan in 1989. After receiving a fellowship for pion therapy at the Cancer Control Agency of British Columbia and TRIUMF, Vancouver, Canada in 1986, he trained at Department of Clinical Oncology, Christie Hospital conducting biomedical research with Paterson Institute, Manchester, United Kingdom in 1987. He obtained his PhD in 1988 from Hokkaido University for biophysical research in pion therapy. Prof. Shirato’s interest in high-precision radiotherapy led him to invent the real-time tumor-tracking radiotherapy system in 1999 and the real-time-image gated proton therapy in 2013, and he collaborates with biologist, physicists, engineers, and industry in translational research globally. Scientific papers regarding stereotactic radiotherapy, image-guidance, internal organ motion, biophysical model, and four-dimensional radiotherapy have been cited worldwide. He received the Japan Academy Prize and the JASTRO Gold Medal in 2022, the Japan Medical Research and Development Award in 2021, the Imperial Invention Award in 2017, and Research Front (Thomson Reuters) in 2007. He has been full professor at Hokkaido University Faculty of Medicine since 2006 until now, had been Chairman of Department of Radiation Oncology from 2006 to 2019. He is the first director of Proton Beam Therapy Center, the first director of Global Center for Biomedical Science and Engineering, and the first Dean of Graduate School of Biomedical Science and Engineering in Hokkaido University. He has been the Vice-Chairman of Japanese Organization of Radiotherapy Quality Management since 2019. He had been a member of the board of JASTRO from 2010 to 2018, is also the former Chairman of the JASTRO Particle Beam Therapy Committee, and the former Representative Director of Japanese Board for Medical Physicist Qualification. He worked as the program leader in the IEC TC62/SC62C to publish TR 62926:2019, guidelines for safe integration and operation of adaptive external-beam radiotherapy systems for real-time adaptive radiotherapy. He has been a member of the committee for the new ICRU report on Prescribing, Recording, and Reporting Proton-Beam Therapy since 2022. Prof. Shirato was elected to the Commission in 2023.

Thomas (Rock) Mackie is a medical physicist. He grew up in Saskatoon and received his undergraduate degree in Physics from the University of Saskatchewan in 1980. He went on to earn his doctorate in Physics at the University of Alberta in 1984. His expertise is in radiation therapy treatment planning, intensity modulated radiation therapy, medical devices including medical imaging systems and microscopy. He is a primary inventor and algorithm designer of the helical tomotherapy concept. Dr. Mackie is an emeritus professor in the departments of Medical Physics, Human Oncology, and Engineering Physics, and an affiliate of the Biomedical Engineering Department at the University of Wisconsin–Madison. He is the former Director of Medical Engineering at the Morgridge Institute for Research, a private not-for-profit medical research institute based in Madison. He has over 180 peer-reviewed publications, over 40 patents, and has been the supervisor for dozens of Ph.D. students. Dr. Mackie is a Fellow of the American Association of Physicists in Medicine and the AAPM William D. Coolidge Award recipient Dr. Mackie was a founder of Geometrics Corporation (now owned by Philips Medical Systems), which developed the Pinnacle treatment planning system and still operates its R&D facility near Madison. He was a founder and Chairman of the Board of TomoTherapy, Incorporated, a public company now owned by Accuray but still based out of Madison. He is a co-founder of Madison-based HealthMyne an integrated cancer information system for use in radiology and oncology. He is on the boards of Shine Medical Technologies, a medical isotope production company and BioIonix a company dedicated to water purification in food production and processing. In 2002, Mackie was one of six Wisconsin regional winners of the Ernst & Young Entrepreneur of the Year awards. Dr. Mackie has been a member of the board of the BioForward an organization supporting Wisconsin biomedical and medical device industries. He was a co-manager of Wisconsin Investment Partners, Wisconsin’s largest angel venture group. Mackie is the Chairman of the Board of the Center for the Assessment of Radiological Sciences, a not-for-profit promoting quality and safety in radiology and radiation oncology. He is the Vice-Chairman of WiSolve, not-for-profit organization promoting graduate student and post-doctoral entrepreneurship at the UW-Madison. Dr. Mackie was elected to the Commission in 2014 and elected as Vice-Chairman of the Commission in 2018.

1. Chairman, Department of Radiation Oncology & Proton and Radiation Therapy Center, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan

2. Associate Professor, Department of Radiation Oncology & Proton

and Radiation Therapy Center, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan

Honor &/or Awards：

1. Outstanding Clinical Educator, Kaohsiung Chang Gung Memorial Hospital, 2014

2. Best Clinical Research Award, The 20th Taiwan Joint Cancer Conference & 14th Cross-Strait Academic Conference on Oncology. 2015

3. Full-funding Scholarship, Stanford-Taiwan Biomedical Program, Stanford University & Stanford Medical Center, Stanford, CA, USA. 2015-2016.

4. Best Clinical Educator, Kaohsiung Chang Gung Memorial Hospital, 2018

5. Best Clinical Research Award, The 24th Taiwan Joint Cancer Conference 2019

6. Outstanding Alumni, National Yang-Ming University Alumni, Kaohsiung Chapter, 2021

1. Medical Physicist Dept. of Proton and Radiation Therapy Center, Chang-Gung Memorial Hospital, Lin-Kou

2. Adjunct Assistant Professor Dept. of Medical Imaging and Radiological Sciences, Chang-Gung University

ProfessionalCertificatio

1. Certificatedof Radiological Technologists, Taiwan (2005)
2. Certificatedof Senior Radiation Protection Officer, Taiwan (2007)
3. Certificated of Medical Physicist, Taiwan (2017)