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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。
Objective To explore the value of 64-slice CT pancreas direct donor arterial imaging. Materials and Methods CT scanning of abdominal aorta was performed in 30 patients with non-pancreatic diseases by using 64-slice spiral CT. Abdominal volume scanning procedure was used to detect the direct blood supply of the pancreas by MIP and VR. image. Two radiologists observed the images and calculated the rates of direct arterial feeding in the pancreas. SAS statistics software was used to compare the rates of vascular display of the two recombinant techniques using the exact probability method. Results The positive rate of pancreaticoduodeneal anastomosis (ASPDA) was 100% and 73% respectively in MIP and VR images. The rates of PSPDA were 100% and 67%, respectively ; The rate of AIPDA was 97% and 67%, respectively; the rate of PIPDA was 93% and 63% respectively; the dorsal artery (DPA) The rates of pancreatic transverse artery (TPA) were 83% and 60%, respectively. The rates of PMA were 90% and 67% respectively. The exact probabilities of Chi square test were used to detect the differences of the display rates of ASPDA, PSPDA, AIPDA, PIPDA, DPA, TPA and PMA between MIP and VR. Conclusion 64-slice CT pancreas direct arterial feeding can provide valuable information for clinic. MIP shows that the pancreas direct feeding artery is better than VR.