Abstract
SYNOPSIS Transcranial ultrasound can rapidly and non-invasively image blood flow in the major basal intracranial arteries. Its accuracy makes it acceptable for use in screening for haemodynamically significant intracranial stenoses or vessel occlusions. Although it has a relatively limited field of view and is not technically feasible in approximately 10% of cases, the information obtained is becoming increasingly relevant to therapeutic decision-making in the prevention and management of stroke. Transcranial Doppler ultrasound or transcranial colour-coded duplex have the advantages of relatively low cost, ease of repeatability, and excellent safety and tolerability, but they provide inferior spatial and anatomical detail in comparison to angiographic techniques. Index words: stroke, magnetic resonance angiography, angiography. (Aust Prescr 2001;24:137–40)
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