Table 1.

MR imaging parameters used in two MR systems

MR sequences		Philips Multiva 1.5 T	Siemens Skyra 3 T
Axial T2-FLAIR		Spin echo; inversion recovery	Spin echo; inversion recovery
	Slice thickness	5 mm	4.5 mm
	Pixel/voxel size	0.89 × 0.89 mm	0.85 × 0.85 mm
	Time echo	140 ms	85 ms
	Time repetition	9000 ms	8000 ms
	Inversion time	2700 ms	2372 ms
	Acquisition matrix	256 × 256	256 × 256
Axial T1-WI		Spin echo	Spin echo
	Slice thickness	5 mm	4.5 mm
	Pixel/voxel size	0.71 × 0.71 mm	0.68 × 0.68 mm
	Time echo	15 ms	11 ms
	Time repetition	678 ms	1800 ms
	Acquisition matrix	320 × 320	320 × 320
Axial T2-WI		Spin echo	Spin echo
	Slice thickness	5 mm	4.5 mm
	Pixel/voxel size	0.34 × 0.34 mm	0.49 × 0.49 mm
	Time echo	120 ms	111 ms
	Time repetition	4000 ms	5000 ms
	Acquisition matrix	672 × 672	448 × 392
Axial 3D T1-WI post-contrast administration		Spin echo volumetric	Spin echo volumetric
	Slice thickness	1.2 mm	0.9 mm
	Pixel/voxel size	0.7 × 0.7 mm	0.89 × 0.89 mm
	Time echo	9.3 ms	11 ms
	Time repetition	400 ms	700 ms
	Acquisition matrix	352 × 352	256 × 256
Axial DWI & ADC		Echo planar imaging	Echo planar imaging
	Slice thickness	5 mm	4 mm
	Pixel/voxel size	0.7 × 0.7 mm	1.72 × 1.72 mm
	Time echo	72 ms	59 ms
	Time repetition	3500 ms	5870 ms
	Acquisition matrix	336 × 336	128 × 128
	b-value	0 & 1000	0 & 1000

FLAIR Fluid-Attenuated Inversion Recovery, T1-WI T1-Weighted Images, T2-WI T2-Weighted Images, DWI Diffusion-Weighted Images, ADC Apparent Diffusion Coefficient