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目的应用64层螺旋CT血管成像(64-MSCTA)探讨活体右半肝肝动脉在肝内分布情况,为右半肝肝脏疾病的诊疗提供形态学资料。资料与方法采集120例受试者肝脏CT图像,经容积再现(VR)技术重组肝动脉。测量右半肝肝动脉相关数据进行统计分析。结果肝右动脉起源变异发生率为13.3%,变异的肝右动脉可起自肠系膜上动脉、胃十二指肠动脉或腹腔干;肝右动脉主干长度为(57.19±24.61)mm;肝右动脉主干起始处、中点(1/2处)、分叉处内径分别为(3.61±0.77)mm、(3.33±0.72)mm、(3.21±0.65)mm;肝右动脉发出左内叶支的出现率为35.0%,其起始处距肝右动脉主干起点处的长度为(22.18±13.63)mm;在肝右叶实质内肝右动脉主干分为2支型、3支型、4支型、5支型的出现率分别为75.8%、3.3%、13.3%、1.7%;肝右动脉右前叶支与右后叶支主干的夹角为(72.70±20.28)°,二者主干长度和起点处内径分别为(27.31±16.13)mm、(2.41±0.67)mm和(33.41±26.48)mm、(2.20±0.64)mm。结论 64-MSCTA可真实、准确地提供活体肝右动脉的形态学资料;肝右动脉在肝内的分支分布较为复杂,在右半肝内以二分支(右前叶支和右后叶支)为主,肝右动脉右前叶支和右后叶支主干的夹角以锐角为主。
Objective To investigate the intrahepatic distribution of the right hepatic artery in vivo using 64-slice spiral CT angiography (64-MSCTA), and to provide morphological data for the diagnosis and treatment of right hepatic disease. Materials and Methods Liver CT images of 120 subjects were collected and the hepatic artery was reconstructed by volumetric reconstruction (VR) technique. Measurement of right hepatic artery data for statistical analysis. Results The incidence of the right hepatic artery origin mutation was 13.3%. The variation of the right hepatic artery could originate from the superior mesenteric artery, the gastroduodenal artery or the celiac trunk. The length of the trunk of the right hepatic artery was (57.19 ± 24.61) mm. (3.61 ± 0.77) mm, (3.33 ± 0.72) mm and (3.21 ± 0.65) mm respectively at the beginning and the middle of the trunk (1/2) and at the bifurcation. The left hepatic artery The incidence rate was 35.0%. The length of the right hepatic artery was (22.18 ± 13.63) mm from the starting point of the trunk. The main artery of the right hepatic artery was divided into 2 branches, 3 branches and 4 branches , And the incidence of the 5 branches was 75.8%, 3.3%, 13.3% and 1.7% respectively. The angle between the right anterior branch of the right hepatic artery and the trunk of the right posterior branch was (72.70 ± 20.28) °. The trunk length and starting point The internal diameters were (27.31 ± 16.13) mm, (2.41 ± 0.67) mm and (33.41 ± 26.48) mm, (2.20 ± 0.64) mm, respectively. Conclusion 64-MSCTA can provide real and accurate morphological data of the right hepatic artery. The distribution of the right hepatic artery in the liver is more complicated. The two branches (right anterior lobe and right posterior lobe branch) The main, right hepatic artery right anterior branch and right posterior branch of the angle between the main angle to the acute angle.