A review by Rakesh Jalali and Dayananda Sharma The 6th Annual Conference of the Particle Therapy Co-Operative Group – Asia-Oceania (PTCOG-AO 2026) was held from 4–6 September 2026 at the Taj Fisherman’s Cove Resort & Spa in Chennai, India. Hosted by the Apollo Proton Cancer Centre, the meeting brought together the particle therapy community from […]
PTCOG-AO 2026 in Chennai: A Great Success and a New Chapter for Particle Therapy in Asia-Oceania
Message from the President Tatsuya Ohno The 6th Annual Conference of the Particle Therapy Co-Operative Group Asia-Oceania (PTCOG-AO 2026) was successfully held in Chennai, India, from September 4 to 6, 2026. As President of PTCOG-AO, I am delighted to share the highlights of this memorable meeting and express my sincere gratitude to everyone who contributed […]
Join us in Washington, D.C. for the PTCOG-NA 12th Annual Meeting!
Join us in Washington, D.C. for the PTCOG-NA 12th Annual Meeting! The 12th Annual PTCOG-NA Meeting will be held in Washington, DC from November 6–8, 2026! The meeting will take place at the Johns Hopkins Bloomberg Center. Physicians, physicists, radiobiologists, dosimetrists, radiation therapists, and radiotherapy professionals will meet for three days of scientific exchange, education, […]
International Journal of Proton Therapy (IJPT)
Volume 21 features research spanning clinical outcomes, treatment planning, artificial intelligence, FLASH therapy, and proton therapy utilization, and IJPT’s AI in Particle Therapy special issue is bringing together emerging work in AI-driven treatment planning, dose calculation, beam delivery, and related applications. In addition, IJPT continues to expand its reach and engagement within the particle therapy […]
Radiobiology at PTCOG64: Highlights & Horizons
Dear PTCOG community, Attending PTCOG64 was, for me, a great reminder of why this meeting is so unique. While the scientific standards were remarkable, as always, its true value is the environment it creates for building meaningful relationships and initiating cross-border research initiatives. What is clear to me, and I think to all of us, […]
Message from the President
Dear colleagues and friends, As we look back at PTCOG64 in Deauville, I would like to thank once again the Local Organizing Committee, our Scientific Program and Educational Subcommittees, our partners, and, most importantly, all members of the PTCOG community who contributed to making the meeting such a success. With more than 1,300 participants from […]
Inequitable Access to Proton Beam Therapy in Europe: Efficiency, Equity, and Strategic Infrastructure Planning to 2030
Dominik Wawrzuta et al. This study assessed the geographic accessibility and capacity of proton beam therapy (PBT) across 31 European countries and modelled how infrastructure expansion could influence equity by 2030. The authors analysed 69,918 administrative subregions using the enhanced two-step floating catchment area (E2SFCA) method, integrating travel time, treatment capacity, and competing regional demand. […]
Proton Bragg Peak FLASH Stereotactic Radiosurgery for Recurrent Glioblastoma Reirradiation
Yangguang Ma et al. This retrospective dosimetric study investigated single-energy Bragg peak proton FLASH radiotherapy (SEBP-FLASH) as a potential alternative to robotic stereotactic radiosurgery (CyberKnife) for reirradiation of recurrent glioblastoma (rGBM). Ten patients with solitary intracranial recurrences, previously treated with radiotherapy at least 12 months earlier, were included. Their clinical CyberKnife plans were reoptimized using […]
Validation of Automated Script-Based Proton Therapy Optimisation for Comparative Head and Neck Planning
Marte Kåstad Høiskar et al. This retrospective study evaluated an automated, rule-based intensity-modulated proton therapy (IMPT) optimisation script developed within a commercial treatment planning system for comparative planning in head and neck cancer (HNC). Twenty patients previously treated with manually optimised IMPT plans were included, predominantly with oropharyngeal cancer. For each patient, two automated IMPT […]
Modelling Dose and Dose-Averaged Linear Energy Transfer to Predict High-Grade Temporal Lobe Necrosis Following Skull-Base Proton Therapy
Giulia Fontana et al. This retrospective study investigated whether combining physical dose and dose-averaged linear energy transfer (LETd) could improve prediction of high-grade temporal lobe necrosis (G2-TLN) after proton therapy (PT) for skull-base tumors. The cohort included 79 patients with chordomas (n=61) and chondrosarcomas (n=18) treated at the CNAO National Center for Oncological Hadrontherapy between […]