Using axial images with reconstruction capabilities weather CT or MRI proved extremely useful in the assessment of stroke with high diagnostic efficiency that reasonably reduced the need for conventional catheter angiography with its possible side effects. Non-invasive techniques such as CTA and MRA have proved to be accurate in vessels (stenosis or occlusion) & aneurysm detection which is the most common causes of stroke. Combined evaluation of the source images with the reconstructed (MIP-MPR-SSD) further improves veesels (stenosis or 0cclusion) & aneurysm detection. To sum up, CTA and MRA provide several advantages over DSA, these include reduced the possibility of arterial injury. 3D-CTA/MRA remains superior in anatomical depiction of the surrounding structures. Both methods have their own weakness that may cause problems during the evaluation of the cause of stroke but they also have their strengths that may prove beneficial to us if used in combination. Moreover, considering the continuous improvement upgrading of the technology; the future will definitely overcome the current shortages in both techniques and provide us with an easy, rapid and highly accurate radiological techniques hopefully in the nearby future.