钆贝葡胺增强磁共振血管成像对肝移植术后血管并发症的诊断价值

目的：研究钆贝葡胺增强磁共振血管成像对肝移植术后血管并发症的诊断价值。方法：46例肝移植患者术后行MRI扫描;利用testbolus测出循环时间后行3D-FLASH扫描,获得各期血管图像。将MRA图像质量确定为5级,诊断血管并发症。结果：MRA对于血管的显示质量均较好。MRA发现肝动脉狭窄6例,肝动脉迂曲3例;门静脉狭窄12例,门静脉栓塞3例;肝静脉变窄4例,均经临床证实。结论：钆贝葡胺增强磁共振血管成像安全无创,对肝动脉、门静脉、肝静脉显示清楚,诊断血管并发症准确度高,有可能成为肝移植术后血管评价首选的影像学检查手段。

Evaluation of Vascular Complications after Liver Transplantation Using Gadobenate Dimeglumine DCE MRA

Objective To determine whether gadobenate dimeglumine DCE MRA can provide an effective evaluation of vascular complications after liver transplantation.Methods 46 consecutive patients were examined with MRI after orthotopic liver transplantation.3D-FLASH scan was performed in the coronal plane after testbolus.Two radiographers categorized vessel visualization on a five-point scale and recorded vascular complications.Results 6 patients suffered from hepatic artery stenosis,and 3 patients had elongation and kinking of hepatic artery.Portal vein stenosis was detected in 12 patients;portal vein thrombosis was found in 3 patients.Hepatic veins stenosis was detected in 4 patients.All diagnoses were confirmed clinically.Conclusion Gadobenate dimeglumine DCE MRA is a highly accurate,noninvasive tool for the evaluation of vascular complications after liver transplantation,which may be a first choice modality in postoperative evaluation.