Objective: Comparative study the principles and applications of 320 Slice, 64 Slice CTA and rotation 3D DSA in diagnosis of intracranial aneurysms in order to choose the most appropriate inspection ways. Methods: The 86 patients who were highly suspected with intracranial aneurysms were examined by 320 slice CTA, 64 slice spiral CTA and had 3D DSA inspection at the same time. To conduct a comparative study of the characteristics of CTA and 3D DSA image. Results: 86 cases had been confirmed by operation and ...