3-DIMENSIONAL CONTRAST-ENHANCED MR-ANGIOGRAPHY OF THE EXTRACRANIAL CAROTID ARTERIES - 2 TECHNIQUES

Two methods of contrast-enhanced dynamic 3-D MR angiography of the hea d and neck are demonstrated. In the first, arterial and arteriovenous phases are temporally resolved by timing contrast injection such that maximum arteriovenous signal intensity difference is matched to acquis ition of central k-space. A second, faster sequence allows for tempora l resolution of arterial, early arteriovenous, late arteriovenous, and washout arteriovenous phases without a need for precise injection tim ing.