Michael Schär1
1Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
1Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
Phase-modulated bSSFP cine imaging with long repetitions times is demonstrated with spiral readouts and spectral-spatial water-only excitation. Signal pileup from blood flowing out of the slice is shown to be reduced with pre-saturation modules.
Figure 3: (Animated gif, please click) Mid-ventricular short-axis cine acquired with phase-modulated bSSFP with BIPS and a long TR of 15ms enabling more efficient spiral readout and water-only excitation pulses. 60 cardiac frames were reconstructed with an in-plane resolution of 2.2mm; images from frequency bins were combined with RMS.
Figure 5: Diastolic cine frames in short-axis orientation (A,C) and orthogonal to right coronary artery (B,D) acquired with conventional Cartesian bSSFP (A,B) or the proposed phase-modulated bSSFP with BIPS method (C,D). Yellow arrows point to dark band artifacts in conventional bSSFP, and green arrows point at the coronary arteries that are obstructed by Indian ink artifacts in conventional bSSFP without fat suppression. Images from frequency bins were combined with complex sum and deblurred.
