Tim Schakel1, Tom Bruijnen1,2, and Marielle Philippens1
1Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, 2Computational Imaging Group for MRI diagnostics and therapy, Centre for Image Science, Utrecht, Netherlands
1Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, 2Computational Imaging Group for MRI diagnostics and therapy, Centre for Image Science, Utrecht, Netherlands
This work demonstrates the feasibility of a multishot 3D diffusion weighted
TSE sequence with a redundant cartesian spiral sampling pattern and data
rejection to improve robustness against phase inconsistencies between different
shots.
Figure
5: In-vivo results,
acquired at 2 mm3 isotropic resolution, different transverse slices; a) b=0
s/mm2, b) b=500 s/mm2 (iso), c) b=1000 s/mm2 (iso), d) ADC map (10-3 mm2/s).
Figure
3: Low resolution
reconstructions for a 19-shot acquisition for a single direction of b=500 s/mm2.
Top left: magnitude images, top right: phase images, bottom: nRMSE and weights
for each shot. Shot 9 was determined to be the reference shot. Shot 6 (red
square) showed most corruption in both magnitude and phase, resulting in a high
error.
