Diagnostic and Economic Evaluation of [ 18 F]FDG PET/CT Versus MRI for Lymph Node Staging in Nasopharyngeal Carcinoma: Implications for Individualized Upper-Neck-Only Irradiation. - Zhao, Ya-Nan; Lan, Xiao-Wen; He, Yun; Wang, Xiao-Hui; Chen, Chun-Yan; Zhang, Xu; Ouyang, Pu-Yun; Xie, Fang-Yun (Journal of Clinical Medicine, 2026)