Inclusion Criteria- Men and Women age greater than 18 year old
- Symptoms suggestive of an acute TIA
Exclusion Criteria- Patients with contraindication to brain imaging: MRI and CT.
- Patient with persistent major deficit (NIHSS> or = 4)
- Informed consent could not be obtained either directly from the patient or from legally authorized representative.
- Severe coexisting or terminal systemic disease with like expectancy below 90 days or that may interfere with the conduct of the study.