64层螺旋CT对胰周血管的显示研究

目的探讨64层螺旋CT对胰周血管的显示能力。方法将符合研究条件的105例接受腹部64层螺旋CT增强扫描的资料，分动脉期和门脉期薄层重建，使用容积再现（VR）和多平面容积重组（MPVR）进行CT血管成像，观察胰周动脉、静脉的显示情况。结果①腹腔干动脉（CTA）、肝总动脉（CHA）、胃左动脉（LCA）、脾动脉（SA）、胃十二指肠动脉（GDA）、胃网膜右动脉（RGEA）、肠系膜上动脉（SMA）、门静脉（PV）、脾静脉（SV）以及肠系膜上静脉（SMV）的显示率均为100％；②胰十二指肠后上动脉（PSPDA）、胰十二指肠后下动脉（PIPDA）、胰背动脉（PDA）、胰横动脉（PTA）、胰尾动脉（PCA）的显示率为43．3％-97．2％；胰十二指肠后上静脉（PSPDV）和胰十二指肠后下静脉（PIPDV）的显示率分别为71．4％和30．5％；③MPVR和VR对胰腺周围小血管的显示率比较，P〈0．05。结论多层螺旋CT对胰周血管具有可靠、稳定的显示率，MPVR对胰周小血管的显示较VR好。

Peripancreatic vessels imaging by 64 slices spiral CT scan

Objective To discuss the ability of 64 slices CT to display the image of peripancreatic vessels. Methods 105 patients underwent abdomen enhancement scans. The scan data of aterial phase and venous phase were reconstructed respectively, the peripancreatic vessels were displayed by means of volume rendering (VR) and multiplanar volume reconstructions (MPVR). The percentage of successful display of the peripancreatic vessels were calculated. Results ①The display frequency of the peripancreatic big arteries and veins, including celiac trunk artery(CTA), common hepatic artery (CHA), 1eft gastric artery(LGA), splenic artery (SA), gastroduodenal artery (GDA), right gastloepiploic artery(RGEA), superior mesenteric artery (SMA), portal vein(PV), superiormesenteric vein(SMV), spleenic vein (SV)was 100%. ②The display frequency of small arteries including superior pancreaticoduodenal artery (PSPDA), inferior pancreaticoduodenal artery (PIPDA), dorsal pancreatic artery (PDA), transverse pancreatic artery (PTA), pancreaticomegana artery (PMA) and caudal pancreatic artery (PCA) ranged from 43.3% to 97.20%,while of the posteriorsuperior pancreaticoduodenal vein (PSPDV) and posterior-inferior pancreaticoduodenal vein (PIPDV) was 71.4% and 30.5% respectively. ③The display frequency of the peripancreatic small vessels by the multiplanar volume reconstruction (MPVR) was higher than that of the volume rendering (VR)(P＜0.05). Conclusions Multislice CT can display the peripancreatic peripancreatic vessels. Furthermore, there is a significant difference in the display frequency of the peripancreatic small vessels between the MPVR and VR reconstruction methods.