Introduce 4π dynamic spot-scanning proton arc therapy (SPArc-4 π) for pancreatic cancer: a comparative planning study with IMPT
SPArc-4 π provides a promising proton planning strategy for pancreatic SBRT-SIB by preserving robust target coverage while improving gastrointestinal organ sparing and reducing predicted toxicity, and support further investigation of SPArc-4 π for safer dose escalation in LAPC.