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Test bolus examination in the carotid artery at dynamic gadolinium-enhanced MR angiography
J K Kim1, R I Farb, G A Wright
1Department of Imaging Research, Sunnybrook Health Science Center, Toronto, Ontario, Canada.
Radiology
|January 10, 1998
Abstract:
At magnetic resonance angiography in nine patients, a test bolus of gadopentetate dimeglumine was injected to determine transit time from venous injection to arrival in the carotid arteries. Mean times to onset of enhancement were calculated (arterial, 15.7 seconds [range, 10-22 seconds]; venous, 23.4 seconds [range, 16-30 seconds]; optimal imaging time, 7.78 seconds [range, 6-10 seconds]). Transit time was calculated correctly with a test bolus examination.