64层螺旋CT血管成像技术对胃癌血供的显示价值

目的:评价64层螺旋CT血管成像技术对于胃周血管及胃癌血供的显示。方法:40例进展期胃癌,应用容积重建(VR)、最大密度投影(MIP)、多平面重建(MPR)显示胃周血管及肿瘤血管。结果:腹腔干、肝固有动脉、胃左动脉、胃右动脉及胃网膜右动脉在VR上能够很清晰的显示出来,MIP显示细小血管较好,但是它在表现三维空间关系上不如VR。当肿瘤与血管有脂肪间隙,或血管完全或部分被肿瘤包绕时,未见明确的管腔狭窄。有6例患者肿瘤侵犯血管,管腔有破坏。结论:64层CTA多种成像方式能比较好的显示胃周血管,以及肿瘤与血管的毗邻、接触面、包绕程度等相互关系。

Value of 64-slice Spiral CT Angiography for Demonstration of Blood Supply of Gastric Carcinoma

Objective:To discuss the value of 64-slice spiral CT angiography (CTA) in showing perigastric blood vessels of the stomach and the blood supply of gastric cancer.Methods:Forty patients with advanced gastric cancer were involved in the study.Volume reconstruction (VR),maximum intensity projection (MIP) and multiple planar reconstruction (MPR) were used to show the blood vessels.Vascular changes were observed in all the cases and the changes of the vessels were analyzed.Results:Celiac artery,left gastric artery,right gastric artery and right gastroepiploic artery were clearly shown.The blood supply of the gastric cancer could be observed.MIP technique was superior to VR in showing small blood vessels,but VR could show the relationship between the stomach and blood vessels.If the fat layer surrounding the vessels was visualized,or the vessels were completely or partly encased by the tumor,no definite constriction of vessel was observed.Blood vessels in 6 patients were destructed by the tumors.Conclusion:The 64-slice spiral CTA demonstrates sufficiently not only the blood vessels around the stomach,but also the relation of adjacency,contact surface and encasement degree between the tumors and the vessels.