Non-enhanced Pattern on Contrast-Enhanced Ultrasound in the Local Efficacy Assessment of Irreversible Electroporation Ablation of Pancreatic Adenocarcinoma. - Lin, Manxia; Xie, Xiaoyan; Xu, Ming; Feng, Shiting; Tian, Wenshuo; Zhuang, Bowen; Su, Liya; Ye, Jieyi; Lin, Jinhua; Liang, Ping; Yu, Jie; Kuang, Ming (Ultrasound in Medicine & Biology, 2018)