Optimization of high-concentration (400 mgI/mL) contrast media volume for abdominal computed tomography: a comparison between fixed-dose and total body weight-based protocols - Li, Wangjia; Bai, Ling; Ren, Wei; Zhang, Zhiwei; Fu, Binjie; Lv, Fajin; Li, Xinyou (Quantitative Imaging in Medicine and Surgery, 2026)