PURPOSE: To assess the impact of parallel imaging algorithms on image quality and volumetric accuracy of CINE magnetic resonance imaging (MRI) with high temporal and spatial resolution using a new 32-channel dedicated cardiac phased array coil. MATERIALS AND METHODS: Fourteen individuals underwent steady-state free precession (SSFP) CINE MRI using a 32-element phased-array coil and parallel imaging acceleration using spatiotemporal sensitivity encoding (TSENSE). Acquisition acceleration ranged from R = 2 to 7. In conjunction with data extracted from phantom measurements, contrast-to-noise ratio (CNR) performance was evaluated for each acceleration factor and subjective image quality was evaluated by two independent readers. In addition, volumetric assessment was performed for each acceleration factor based on a single breath-hold multi-slice data acquisition. Results were compared to nonTSENSE measurements. RESULTS: CNR for non-accelerated CINE (R = 1) was 45.7 +/- 12.8 and showed a constant decrease with increase in acceleration of 51% at R = 4 and 86% at R = 7. CNR losses accompanied reductions in subjective image quality. Volumetric evaluation was accurate for R <or= 4, with significant underestimation of ejection fraction (EF) at higher accelerations. CONCLUSION: This study shows that one-dimensional acceleration factors up to R = 4 allow accurate SSFP CINE MRI even though CNR is significantly reduced. This allows for a marked reduction in scan time and allows for multi-slice CINE imaging with high spatial and temporal resolution. (c) 2005 Wiley-Liss, Inc.
PURPOSE: To assess the impact of parallel imaging algorithms on image quality and volumetric accuracy of CINE magnetic resonance imaging (MRI) with high temporal and spatial resolution using a new 32-channel dedicated cardiac phased array coil. MATERIALS AND METHODS: Fourteen individuals underwent steady-state free precession (SSFP) CINE MRI using a 32-element phased-array coil and parallel imaging acceleration using spatiotemporal sensitivity encoding (TSENSE). Acquisition acceleration ranged from R = 2 to 7. In conjunction with data extracted from phantom measurements, contrast-to-noise ratio (CNR) performance was evaluated for each acceleration factor and subjective image quality was evaluated by two independent readers. In addition, volumetric assessment was performed for each acceleration factor based on a single breath-hold multi-slice data acquisition. Results were compared to nonTSENSE measurements. RESULTS: CNR for non-accelerated CINE (R = 1) was 45.7 +/- 12.8 and showed a constant decrease with increase in acceleration of 51% at R = 4 and 86% at R = 7. CNR losses accompanied reductions in subjective image quality. Volumetric evaluation was accurate for R <or= 4, with significant underestimation of ejection fraction (EF) at higher accelerations. CONCLUSION: This study shows that one-dimensional acceleration factors up to R = 4 allow accurate SSFP CINE MRI even though CNR is significantly reduced. This allows for a marked reduction in scan time and allows for multi-slice CINE imaging with high spatial and temporal resolution. (c) 2005 Wiley-Liss, Inc.
Authors: Kai Nassenstein; Holger Eberle; Stefan Maderwald; Christoph J Jensen; Christina Heilmaier; Thomas Schlosser; Oliver Bruder Journal: Eur Radiol Date: 2010-06-09 Impact factor: 5.315
Authors: P T Parikh; G S Sandhu; K A Blackham; M D Coffey; D Hsu; K Liu; J Jesberger; M Griswold; J L Sunshine Journal: AJNR Am J Neuroradiol Date: 2010-12-16 Impact factor: 3.825
Authors: Richard Winkelmann; Peter Börnert; Jan De Becker; Romhild Hoogeveen; Peter Mazurkewitz; Olaf Dössel Journal: MAGMA Date: 2006-11-24 Impact factor: 2.310
Authors: Anderson N Nnewihe; Thomas Grafendorfer; Bruce L Daniel; Paul Calderon; Marcus T Alley; Fraser Robb; Brian A Hargreaves Journal: Magn Reson Med Date: 2011-02-01 Impact factor: 4.668
Authors: Melanie Schmitt; Andreas Potthast; David E Sosnovik; Jonathan R Polimeni; Graham C Wiggins; Christina Triantafyllou; Lawrence L Wald Journal: Magn Reson Med Date: 2008-06 Impact factor: 4.668