Day D L, Letourneau J G, Allan B T, Ascher N L, Lund G
AJR Am J Roentgenol. 1986 Nov;147(5):1027-30. doi: 10.2214/ajr.147.5.1027.
Nine pediatric liver transplant candidates underwent preoperative MR evaluation of the portal vein and the inferior vena cava. Sonographic correlation was available in all patients and angiographic correlation was available in five. Pathologic correlation was obtained in seven cases either at liver transplantation or autopsy. MR demonstrated portal vein patency in three cases when it was not seen by angiography and confirmed portal vein patency in one patient when it was questionably identified on sonography. The portal vein was not seen on MR imaging in two cases when it was seen on sonography and angiography: in one case, it was small and to-and-fro flow was demonstrated angiographically; in the second case, the portal vein was occluded by tumor thrombus. Two vessels in two patients were misidentified by sonography and identified correctly by MR. These were an azygous continuation of the inferior vena cava and a large collateral vein in the portal region. Knowledge of the anatomy and documentation of vascular patency are essential in evaluation of patients before liver transplantation. In patients with complex anatomy or hemodynamics, it may be necessary to obtain this information from several imaging techniques (sonography, angiography, and MR).
九名小儿肝移植候选者接受了门静脉和下腔静脉的术前磁共振（MR）评估。所有患者均有超声检查结果可供对照，五名患者有血管造影检查结果可供对照。七例患者在肝移植或尸检时获得了病理对照。三例患者血管造影未显示门静脉通畅，但MR显示门静脉通畅；一例患者超声检查门静脉显示可疑，MR证实门静脉通畅。两例患者超声检查和血管造影均显示门静脉，但MR成像未显示：一例门静脉细小，血管造影显示有往返血流；另一例门静脉被肿瘤血栓阻塞。两名患者的两条血管超声检查误诊，MR检查正确识别。这两条血管分别是下腔静脉奇静脉延续和门静脉区域的一条大侧支静脉。了解解剖结构并记录血管通畅情况对于肝移植术前患者评估至关重要。对于解剖结构复杂或血流动力学复杂的患者，可能需要从多种成像技术（超声、血管造影和MR）获取这些信息。
