目的 应用肝“一站式”检查的THRIVE序列采集并重建肝门静脉图像,分析肝门静脉变异。方法 收集648例应用THRIVE序列采集并重建的肝门静脉三维图像,分析肝门静脉解剖变异,并分别测量肝门静脉主干(MPV)、脾静脉(SV)、肠系膜上静脉(SMV)及肠系膜下静脉(IMV)的管径。结果 (1)肝门静脉的肝内变异:正常型79.2%(514/648)、Ⅰ型变异8.3%(54/648)、Ⅱ型变异9.0%(58/648)、Ⅲ型变异3.4%(22/648);(2)肝门静脉的肝外变异:Ⅰ型37.4%(167/447)、Ⅱ型20.4%(91/447)、Ⅲ型36.2%(162/447)、其他6.0%(27/447);(3)管径测量:MPV(14.03±2.44) mm、SV(9.51±2.40) mm、SMV(11.14±1.99) mm、IMV(6.01±0.78) mm。结论 肝“一站式”检查中,应用THRIVE序列采集、重建的血管图像,分析肝门静脉变异是可行的。
Objective To analyze the anatomic variation of the portal vein based on magnetic resonance angiography using THRIVE sequence in "one-stop" examination of the liver.Methods Reconstructed three-dimensional images of 648 cases of hepatic portal vein acquired by THRIVE sequence were analyzed. Anatomic variation of the hepatic portal vein was investigated and the di- ameters of main portal vein (MPV) , splenic vein (SV) , superior mesenteric vein (SMV) and inferior mesenteric vein (IMV) were measured. Results (1 )Four types of different variations of intrahepatic portal vein were observed, with normal type accounting for 79.2% (514/648), type Ⅰ 8.3% (54/648), type Ⅱ 9.0% (58/648) and type Ⅲ 3.4% (22/648), respectively.(2)Four types of dif ferent variations of extrahepatic portal vein were also observed, with type Ⅰ accounting for 37.4% (167/447), type Ⅱ 20.4% (91/ 447), type Ⅲ 36.2% (162/447) and other 6.0% (27/447), respectively.(3}Diameter of MPV, SV, SMV and IMV were (14.03± 2.44) mm, (9.51±2.40) mm, (11.14±1.99) remand (6.01±0.78) mm, respectively.Conclusion It is feasible to analyze anatomic variation in the hepatic portal vein using reconstructed three dimensional images acquired by THRIVE sequence in "one-stop" exami nation of the liver.