MSCT在正常人肝门静脉系统研究中的应用

THE USE OF MSCT IN STUDYING NORMAL HEPATIC PORTAL VEINS

目的利用MSCT对正常人的肝门静脉和脾静脉进行研究与测量,求得其解剖学数据,供临床参考。方法在106例成人MSCT上腹部连续冠状多平面重建(MPR)图像上,选取肝门静脉主干和肠系膜上静脉层面,对肝门静脉、肠系膜上静脉和脾静脉进行了研究。结果经肠系膜上静脉的断层上,测得肝门静脉角的大小为(105.51±36.41)°,脾静脉近端口直径为(8.14±0.38)mm,肠系膜上静脉近端口直径为(9.52±1.77)mm。经肝门静脉主干的冠状断面,可以清晰显示肝门静脉的主干,自肠系膜上静脉与脾静脉的汇合点至肝门处分支前,其长度最长为71 mm,最短44 mm,平均(56.85±2.55)mm;近肝端口直径为(12.87±1.50)mm,远肝端口直径为(12.78±0.73)mm,二者相比无统计学意义(t=0.305,P>0.05)。结论经肠系膜上静脉及肝门静脉主干的冠状断面上,测得的肝门静脉近肝端口、脾静脉近端口、肠系膜上静脉近端口直径及肝门静脉角的大小可为了解胰腺周围静脉回流状态及压力提供影像学依据。

Objective To study normal hepatic portal veins by means of multi-slice CT （MSCT） so as to provide anatomical data for clinical reference. Methods Cross-sections of the hepatic portal vein and the superior mesenteric vein from the MSCT and MPR coronary images of the superior abdomen of 106 adults were ,selected to study hepatic portal vein, superior memnteric vein and splenic vein. Results The degree of the angle of hepatic portalvein was （105.51 ± 36, 41 ）°. The diameter of the proximal end of splenic vein was （8.14 ±0.38） mm. The diameter of the proximal end of superior mesenteric vein was （9.52± 1.77） mm. From the portal area of superior mesenteric vein and splenic vein to the hepatic port ranged from 44 mm to 71 mm（average of 56.85 mm ± 2.55 mm）. The diameters of the proximal end and the distal end of the hepctic portal vein were （ 12.87 ±1.50） mm and （12.78±0.73） mm. Conclusion The diameters of the proximal ends of hepatic portal vein, splenivein and superior mesenteric vein and the angle of hepatic protal vein measured from the coronary cross-sections of superior mesenteric vein and hepatic protal vein can be used to provide data of venous return around panerea and the pressure distribution according to the MSCT images.