Proton Arc Therapy among the “Top 10 Breakthroughs” of 2025 according to Physics World

Medical physics and proton therapy in Trento are emerging internationally as leaders in one of the most significant advances in the field of physics applied to oncology. The prestigious journal Physics World has included the first clinical application in Italy of Proton Arc Therapy (PAT) among the Top 10 Breakthroughs of the Year in Physics for 2025 — the list of the ten discoveries or innovations that have contributed most to the development of physics and its applications during the year.

This acknowledgement testifies not only to the clinical and technological excellence achieved at ASUIT’s proton therapy unit, but also to the fundamental role that medical physics and applied research play in transforming cancer care. Being cited among the major breakthroughs of the year goes beyond the boundaries of medicine: it means that a project born in Trento, developed in close collaboration with industrial partners, has a real and measurable impact on public health globally.

The acknowledgement is based on a tangible result: the launch of the world's first clinical treatments using Proton Arc Therapy (PAT), an emerging technique that represents an evolution in proton therapy. The Trento team demonstrated the clinical feasibility of PAT after a thorough dosimetric comparison with the best proton plans currently in use. The characteristics and advantages of this type of treatment for patients with head and neck tumors, a particularly complex area due to the proximity of numerous organs at risk, were published for the first time worldwide in the journal Medical Physics. Unlike conventional techniques, which are limited by a small number of beam directions, Proton Arc Therapy uses a wide variety of irradiation angles, allowing for a more conformal dose distribution and better protection of healthy tissue. This also translates into potential clinical benefits: analyses have shown an estimated reduction in the risk of complications and an improved treatment tolerability profile.

Based on these results, proton therapy in Trento expanded its activities during its first year of clinical use: more than 50 patients have been treated or are currently being treated with Proton Arc Therapy for various types of tumors in various locations. All treatments were performed using existing clinical infrastructure, without modifying standard operating procedures, and with treatment times comparable to those of conventional techniques. Work will continue in the future with the analysis of acute toxicity data and further optimizations to reduce treatment times, confirming Trento as one of the international centers of reference in the clinical development of next-generation proton therapy.

https://physicsworld.com/a/top-10-breakthroughs-of-the-year-in-physics-for-2025-revealed/