Experience of synchronous subtraction 64-slice spiral CT angiography in diagnosis of carotid artery stenosis

Objective To evaluate accuracy and image value of 64-slice spiral CT synchronous subtraction angiography in diagnosis of carotid artery stenosis.Methods Thirty-six cases with carotid stenosis were analyzed retrospectively,MPR,VR and MIP were synthesized and various reconstruction technique was used.Results Among 36 cases,48 branchs carotid artery stenosis in total,16 cases with slight degree of stenosis,5 cases with medium degree of stenosis,and 4 cases with serious stenosis in the initiate part of internal and external carotid artery.There were 18 cases with slight degree of stenosis and 6 cases with medium degree of stenosis in carotid artery bifurcation.There were 4 cases with slight degree of stenosis and one case with medium degree of stenosis at the beginning of the common carotid artery.There were 6 cases with slight degree of stenosis and 2 cases with medium degree of stenosis in initiate part of vertebral artery.There were 2 cases with initiate part of internal carotid artery.Conclusion 64slice spiral CT synchronous subtraction angiography can provide a direct-viewing and precise imaging of the carotid stenosis in diagnosis,and have the important value for clinical application.