Carotid bifurcation: evaluation of time-resolved three-dimensional contrast-enhanced MR angiography.
A magnetic resonance (MR) angiographic protocol was evaluated in the carotid bifurcation with use of a pulse sequence for time-resolved three-dimensional imaging of contrast material kinetics. The enhancement ratio, a quantitative measure of contrast enhancement, indicated that all studies included an image obtained near the peak of the intraarterial concentration of contrast agent (enhancement ratio, 90% +/- 9 [standard deviation]). Studies acquired at a higher frame rate (4.1-4.9 seconds) exhibited less venous enhancement (enhancement ratio, 25% +/- 16) than studies acquired with slower (6.0-9.6-second) frame rates (enhancement ratio, 46% +/- 25).
Carroll
T J
TJ
Department of Medical Physics, University of Wisconsin-Madison, E3/311 Clinical Science Center, 600 Highland Ave, Madison, WI 53792-3252, USA. carrollt@master.radiology.wisc.edu
Korosec
F R
FR
Petermann
G M
GM
Grist
T M
TM
Turski
P A
PA
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002339:Carotid Arteries / Q000000981:diagnostic imaging*; D003287:Contrast Media; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D011859:Radiography
D003287:Contrast Media