Intracranial aneurysms, also called cerebral aneurysms, are aneurysms of intracranial arteries. Most intracranial aneurysms occur in 5-6% of the general population. Patients with intracranial aneurysms either present catastrophically with rupture of the aneurysm or have aneurysms that are incidentally discovered. The prognosis is drastically different in each case, with a greater than 50% incidence of death if the aneurysm ruptures. On the other hand, the surgical or endovascular mortality following treatment of an unruptured aneurysm is minimal. In the appropriate clinical setting, it is important to find a screening study to detect a cerebral aneurysm so that definitive cerebral angiography can be performed. Magnetic resonance imaging (MRI) and magnetic resonance angiogram (MRA) can detect an aneurysm in 60-85% of cases. Magnetic resonance angiography techniques continue to improve with better gradients, enhanced sequences to detect flow and reduce flow-related artefacts, shorter echo times with possible use of echo-planar (short scanning time) techniques, and improved imaging matrix, and they may, in conjunction with computed tomographic angiography (CTA), become a reliable noninvasive technique for detection of intracranial aneurysm.