【正文】 5C — 57yearold woman with cholangitis and nonsectorial transient hepatic intensity differences in hepatic dome. Axial gradientecho T1weighted gadoliniumenhanced arterial phase MR images (146/2) show further appearance of arterializations with biliary vessel disease: peribiliary (arrows, B), distributed along dilated biliary vessels, and pseudoglobular, mimicking a focal lesion (arrowhead, C). ? 先天性的肝動脈門靜脈瘺 先天性肝動脈 門靜脈分流 congenital arterioportal shunt. ? — 63yearold man with sectorial transient hepatic intensity difference in right hepatic lobe caused by congenital arterioportal shunt. Axial gradientecho T1weighted gadoliniumenhanced arterial phase MR images (TR/TE, 146/2) show arterial phenomenon (arrowheads) caused by arterioportal shunt (arrow, A). ? segment VIII ? 男性 65患者，活檢后持續(xù)存在局部楔形灌注改變。 低密度灌注異常 CT表現 ： 增強掃描時表現為動脈期一過性肝實質內楔形、三角形低密度影，密度均勻，邊界銳利或與周圍組織之間無明確邊界，門靜脈期恢復等密度；異常低灌注多出現于鐮狀韌帶、靜脈韌帶、膽囊窩附近以及肝淺表部位等 。 參考文獻 參考文獻 定義： 肝臟一過性灌注異常， THPD。 ? 門靜脈分支癌栓 （白色箭頭）導致楔形動脈期一過性強化灶， ? 癌栓并在 T2圖像上得到證實。癌灶和子灶。大多數的 THPD不會引起臨床癥狀。 ? THPD的影像學表現 CT表現 高密度灌注異常 CT表現 ： 增強掃描時表現為動脈期一過性肝實質楔形、三角形、類圓形以及不規(guī)則高密度影，密度均勻，邊緣清晰，與周邊肝組織之間有清楚的窄移行帶，脈管系統(tǒng)無移位，在高密度灌注異常影中可見血管影，門靜脈期恢復等密度，可單發(fā)或多發(fā)。 ? 腫瘤外側的楔形動脈期一過性強化灶； ? Fig. 10C — 59yearold man with large hepatic intraparenchymal metastasis from colon carcinoma and correlated sectorial fanshaped transient hepatic intensity difference. Axial gradientecho fatsuppressed T1weighted unenhanced (146/2) (B) and axial gradientecho fatsup