Non-contrast magnetic resonance venography as a preoperative imaging modality for refractory venous malformation: a case description - Hsu, Yin-Chen; Huang, Yao-Kuang; Tseng, Yuan-Hsi; Chen, Pang-Yen; Wu, Chao-Ming; Chen, Chien-Wei (Quantitative Imaging in Medicine and Surgery, 2021)