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Clinical Application of CT Virtual Endoscopy in Vascular Diseases

LIU Wan-hua,CHEN Feng,CHU Cheng-feng,ZHENG Kai-er Department of Radiology,Affiliated Hospital,Nanjing Railway Medical College,Nanjing 210009  
Objective:To evaluate clinical dignostic efficiency and limitation of CT virtual intravascular endoscopy in assessment of vascular diseases.Methods:Contrast enhanced spiral CT of the vessels was performed in 25 patients including abdominal aneurysm(6 cases),aortic dissection(7 cases),compression of vesssels by lymphadenovarix(5 cases),abnormal drainage of partial pulmonary venus(1 case),right middle cerebral artery aneurysm(1 case) and normal vessels(5 cases).All cases were scaned by using collimation of 3~7 mm,pitch of 1.5~2.5,reconstruction of 1.5~2 mm.CT virtual intravascular endoscopy,two-dimensional images,MPVR,SSD and MIP were created in workstation.Results:CT virtual intravascular endoscopy can dimonstrate the inner lumen of vessels,normal and abnormal orifice,intimal flap and site of rupture and ture or false lumen of aortic dissection.Conclusion:As a noninvasive method CT virtual intravascular endoscopy combined with other three-dimensional postprocessing techniques will provide more information for the diagnosis of vascular diseases. [
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