64层CT胰腺直接供血动脉成像研究

目的 探讨64层CT胰腺直接供血动脉成像的价值.资料与方法 应用64层螺旋CT对30例非胰腺病患者行腹主动脉CT造影检查,采用腹部容积扫描程序,应用最大密度投影(MIP)和容积再现(VR)技术,获得胰腺直接供血动脉血管图像.由两名放射科医师观察图像并计算胰腺直接供血动脉显示率,应用SAS统计学软件行卡方检验确切概率法对两种重组技术的血管显示率进行比较.结果 在MIP和VR重组图像上,胰十二指肠上前动脉(ASPDA)显示率分别为100%、73%;胰十二指肠上后动脉(PSPDA)显示率分别为100%、67%;胰十二指肠下前动脉(AIPDA)显示率分别为97%、67%;胰十二指肠下后动脉(PIPDA)显示率分别为93%、63%;胰背动脉(DPA)显示率分别为93%、57%;胰横动脉(TPA)显示率分别为83%、60%;胰大动脉(PMA)显示率分别为90%、67%.应用卡方检验确切概率法,MIP与VR对ASPDA、PSPDA、AIPDA、PIPDA、DPA、TPA、PMA的显示率的差异有统计学意义.结论 64层CT胰腺直接供血动脉成像能为临床提供有价值的信息,MIP显示胰腺直接供血动脉优于VR.

Reserch on Angiography of the Direct Feeding Arteries of Pancreas using 64-slice CT

Objective To explore the clinical value of 64-slice CT in the visualization of the direct feeding arteries of pancreas. Materials and Methods Abdominal aortagraphy with the 64-slice CT was performed for 30 cases meeting the including and excluding criteria. The images of the direct feeding arteries of pancreas were reconstructed by MIP(Maximum intensity projection, MIP) and VR (Volume rendering). Two radiologists evaluated together and recorded degree of visualizaion of direct feeding arteries of pancreas. The results were analyzed using the chi-squared test. Results In MIP and VR visualization rotes of ASPDA were 100%, 73% respectively, PSPDA 100%, 67% ; AIPDA 97%, 67% ; PIPDA 93%,63% ;DPA 93% ,57% ;TPA 83% ,60% ;PMA 90% ,67%. There was significant difference in visualization rates of ASPDA,PSPDA,AIPDA,PIPDA,DPA,TPA,PMA between MIP and VR. Conclusion Angiography of the direct feeding arteries of pancreas with 64-slice CT can provise valuable information for clinician. MIP is superior to VR in the visualization of direct feeding arteries of pancreas.