Table 1

MRI sequence parameters

SequenceRepetitiontime (TR) (ms)Echo time (TE) (ms)Flip angleAcquired voxel size (mm)Reconstructed voxel size (mm)Other parameters
September 2014 to November 2015 (n=18, 26%), adult 32-channel head coil
T1-weighted (magnetisation prepared rapid acquisition gradient echo)174.613°0.82×0.97×10.82×0.82×0.5TI: 1465 ms
T2-weighted (fast-spin echo)14 47316090°1.15×1.18×20.86×0.86×2
Diffusion-weighted imaging75364990°2×2×21.75×1.75×232 directions, b=0, 750 s/mm2
Susceptibility-weighted imaging (spoiled gradient-recalled echo)322512°0.45×0.45×1.80.4×0.4×1.8
Venogram186.710°0.9×0.9×20.44×0.44×1Phase contrast velocity 15 cm/s
November 2015 to November 2017 (n=52, 74%), neonatal 32-channel head coil and positioning device20
T1-weighted (magnetisation prepared rapid acquisition gradient echo)114.60.81×0.8×0.80.76×0.76×0.8TI: 714 ms
T2-weighted multislice turbo spin echo, sagittal and axial, combined in reconstruction1215690°0.81×0.82×1.60.8×0.8×0.8
Diffusion-weighted imaging72 38009090°1.5×1.5×3, slice gap −1.5 mm1.17×1.17×3, slice gap −1.5 mm300 directions, b=0, 400, 1000, 2600
Susceptibility-weighted imaging (spoiled gradient-recalled echo)322512°0.45×0.45×1.80.4×0.4×1.8
Venogram186.710°0.9×0.9×20.44×0.44×1Phase contrast velocity 15 cm/s