title: Test bolus examination in the carotid artery at dynamic gadolinium-enhanced MR angiography.
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.
authors.affiliation: Department of Imaging Research, Sunnybrook Health Science Center, Toronto, Ontario, Canada.
authors.forename: J K
authors.initials: JK
authors.lastname: Kim
authors.forename: R I
authors.initials: RI
authors.lastname: Farb
authors.forename: G A
authors.initials: GA
authors.lastname: Wright
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001783:Blood Flow Velocity; D002339:Carotid Arteries / Q000473:pathology; D016893:Carotid Stenosis / Q000175:diagnosis*; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D019786:Gadolinium DTPA / Q000008:administration & dosage; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D013997:Time Factors
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA