3D time-resolved contrast-enhanced MR DSA: advantages and tradeoffs.
The 3D TRICKS method for contrast-enhanced, time-resolved MR DSA has been recently described. In this paper, computer simulations are used to investigate the relative frame rate, temporal window, artery-vein temporal separation, contrast-to-noise ratio, and spatial resolution of TRICKS and conventional scans for breath-hold and non-breath-hold applications. For non-breath-hold applications, TRICKS can be configured to provide increased CNR or spatial resolution at an increased frame rate, but with a longer temporal window when compared with a series of conventional scans in which the central portion of k-space is sampled at the same rate as for the TRICKS scans. For breath-hold applications, TRICKS typically provides three images with 75% of the conventional single acquisition spatial resolution and is more tolerant of variations in contrast curve shape within the field of view.
Department of Medical Physics, The University of Wisconsin-Madison, USA.
C A
CA
Mistretta
T M
TM
Grist
F R
FR
Korosec
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R
Frayne
D C
DC
Peters
Y
Y
Mazaheri
T J
TJ
Carrol
D003198:Computer Simulation; D003287:Contrast Media; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008955:Models, Cardiovascular; D013997:Time Factors
D003287:Contrast Media