Single breath-hold real-time cine MR imaging: improved temporal resolution using generalized autocalibrating partially parallel acquisition (GRAPPA) algorithm.
The purpose of this study was to test parallel imaging techniques for improvement of temporal resolution in multislice single breath-hold real-time cine steady-state free precession (SSFP) in comparison with standard segmented single-slice SSFP techniques. Eighteen subjects were examined on a 1.5-T scanner using a multislice real-time cine SSFP technique using the GRAPPA algorithm. Global left ventricular parameters (EDV, ESV, SV, EF) were evaluated and results compared with a standard segmented single-slice SSFP technique. Results for EDV ( r=0.93), ESV ( r=0.99), SV ( r=0.83), and EF ( r=0.99) of real-time multislice SSFP imaging showed a high correlation with results of segmented SSFP acquisitions. Systematic differences between both techniques were statistically non-significant. Single breath-hold multislice techniques using GRAPPA allow for improvement of temporal resolution and for accurate assessment of global left ventricular functional parameters.
Wintersperger
Bernd J
BJ
Department of Clinical Radiology, University of Munich, Klinikum Grosshadern, Marchioninistrasse 15, 81377 Munich, Germany. wintersperger@ikra.med.uni-muenchen.de
Nikolaou
Konstantin
K
Dietrich
Olaf
O
Rieber
Johannes
J
Nittka
Matthias
M
Reiser
Maximilian F
MF
Schoenberg
Stefan O
SO
D000465:Algorithms; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods; D016277:Ventricular Function, Left