GEMA-Score: Granular Explainable Multi-Agent Score for Radiology Report Evaluation. - Zhenxuan Zhang; Kinhei Lee; Weihang Deng; Huichi Zhou; Zihao Jin; Jiahao Huang; Zhifan Gao; Dominic C. Marshall; Yingying Fang; Guang Yang 006 (CoRR, 2025)