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+Evaluation
'''[[MRI of the head]]''' is a better imaging modality for TIA than a '''[[CT of the head]]''', as it is better able to pick up both new and old ischemic lesions than CT. [[CT of the head]], however, is more widely available and can be used particularly to rule out intracranial hemorrhage.<ref name="Simmons2012">{{cite journal | author = Simmons B, Cirignano B, Gadegbeku A | date = Sep 2012 | title = Transient Ischemic Attack: Part I. Diagnosis and Evaluation | url = | journal = Am Fam Physician | volume = 86 | issue = 6| pages = 521–526 }}</ref> MRI should include diffusion sequences”,<ref name="Easton6"/>, since these can help further localize the area of ischemia and can serve as prognostic indicators.<ref name="Adams">{{cite journal | author = Adams HP Jr, del Zoppo G, Alberts MJ ''et al.'' | year = 2007 | title = "Guidelines for the early management of adults with ischemic stroke " a guideline from the American Heart Association/American Stroke Association Stroke Council, Clinical Cardiology Council, Cardiovascular Radiology and Intervention Council, and the Atherosclerotic Peripheral Vascular Disease and Quality of Care Outcomes in Research Interdisciplinary Working Groups: the American Academy of Neurology affirms the value of this guideline as an educational tool for neurologists [published corrections appear in ''Stroke''. 2007;38(9) e96, and ''Stroke''. 2007;38(6) e38] | url = | journal = Stroke | volume = 38 | issue = 5| pages = 1655–1711 | doi=10.1161/strokeaha.107.181486}}</ref>
==Evaluation==The main purpose of the investigation is to rule out [[stroke]]. ==Further evaluationimaging==Vessels Once a diagnosis of transient ischemic attack has been made, vessels in the head and neck may be evaluated to look for atherosclerotic lesions that may benefit from interventions such as carotid endarterectomy. The vasculature can be evaluated through the following imaging modalities: [[magnetic resonance angiography]] (MRA), [[CT angiography]] (CTA), and [[carotid ultrasonography]]/transcranial doppler ultrasonography.<ref name="Easton6" /> Carotid ultrasonography is often used to screen for carotid artery stenosis, as it is more readily available. Since these imaging methods have variable sensitivities and specificities, more than one may be needed to help confirm the diagnosis (for example: screen for the disease with ultrasonography, and confirm with CTA).<ref name="USpreventive">{{Cite web|url=https://www.uspreventiveservicestaskforce.org/Page/Document/RecommendationStatementFinal/carotid-artery-stenosis-screening|title=Final Recommendation Statement: Carotid Artery Stenosis: Screening - US Preventive Services Task Force|website=www.uspreventiveservicestaskforce.org|language=en|access-date=2017-12-13}}</ref>
==References==
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