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Table 1 Sequence parameters for the BH-MRA and FB-TRA sequences

From: Free breathing contrast-enhanced time-resolved magnetic resonance angiography in pediatric and adult congenital heart disease

  BH-MRA FB-TRA
TE/TR (ms) ~0.8/1.9 ~1.5/9.1
Readouts Cartesian Spiral
Spiral interleaves for fully sampled kx-ky - 16 Spiral
Cardiac gating ECG None
Acceleration factor (in kx-ky) 2 (GRAPPA) 4 (SENSE)
Partial-Fourier in ky 75 % -
Matrix size ~144×256 196×196
Image FOV (mm) ~250×435×260 450×450×220
Orientation Sagittal Transverse
Number of slices ~144 96
Slice thickness (mm) ~2.0 2.3
Flip angle 25o 25o
Pixel bandwidth (Hz/pixel) 1500 2170
Acceleration factor (in kz) - 2 (SENSE)
Partial-Fourier in kz 75 % 75 %
Breath-hold duration (s) ~13.5 Free-breathing
Measurements 2 per vasculature of interest(1 pre-contrast, 1 post-contrast) 50
Spatial resolution (mm) ~1.7×1.7×1.8 ~2.3×2.3×2.3
Temporal resolution (s) ~13.5 ~1.3
Total acquisition time (m:s) ~2:30 ~1:25