Per-Pulse Collection-Efficiency Correction for the FFF Era | Andy Murray | ASTRO 2026

Presented at ASTRO 2026, Andy Murray, R&D Product Physicist at Sun Nuclear, gives a clinical science overview of per-pulse collection-efficiency correction in SunDOSE. Ion recombination isn’t a single number. It varies with dose-per-pulse along every scan, and that matters more in FFF and other high-dose-per-pulse beams. Andy explains how SunDOSE corrects each measured point from its own local dose-per-pulse rather than applying one factor everywhere. He then shows measured data from a clinical campaign using SunSCAN 3D and SunDOSE with a prototype Accela* system. The talk compares the results to an independent two-voltage measurement and covers what the correction means for commissioning data and for support of Accela. https://www.sunnuclear.com/products/s... *510(k) pending. Not available for sale in any market and no guarantee of commercialization or feature availability. Accela is a product of Varian Medical Systems, Inc., a Siemens Healthineers Company. #MedicalPhysics #RadiationOncology #IonRecombination