Objective To research the clinical value for demonstrating collateral pathways in aortoiliac occlusive disease with 64-detector CT.Methods 57 patients of aortoiliac occlusive disease underwent computed tomographic angiography,who were classified clinically according to the location and extent of lesions,and recorded for the collateral patheways.Results There were 5 cases of type Ⅰ,22 cases type Ⅱ,and 30 cases type Ⅲ.Two dominant collateral pathways were found.The systemic-systemic collateral pathways includ...