Related Experiment Videos
Carotid bifurcation: evaluation of time-resolved three-dimensional contrast-enhanced MR angiography
T J Carroll1, F R Korosec, G M Petermann
1Department 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
Abstract:
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).