ABSTRACT
Computed tomographic angiography (CTA) is a non-inva-
sive tool for the evaluation of the cervical and cerebral vas-
culature. The development and application of this
technique has occurred later than the competing modalities
of digital subtraction angiography (DSA) and magnetic res-
onance angiography (MRA). While CTA is the relative
newcomer, recent advances in CT technology have made it
progressively more competitive with these other modalities.
The current use of CTA, MRA and DSA in the evaluation
of the cervical and cerebral vasculature is in flux, and is
