Table 2.

MRI acquisition parameters for each center participating in the INNI initiative

	Center A	Group B	Group C	Group D
Scanner	Philips Intera	GE Signa HDxt	Siemens Verio	Philips Achieva
Coil	8-channel coil	8-channel coil	12-channel coil	32-channel coil
3D-T1 weighted
Sequence	[FFE–TFE]	IR-FSPGR	MPRAGE	TFE
Imaging plane	[Axial–Sagittal]	Sagittal	Sagittal	Axial
Spatial resolution [mm3]	[0.9 × 0.9 × 1.6–1 × 1 × 1]	1 × 1 × 1.2	0.5 × 0.5 × 1	1 × 1 × 2
Acquisition matrix	[256 × 256–256 × 256]	256 × 256	256 × 256	256 × 256
Slices	[220–204]	166	176	192
TR [ms]	[25–7]	6.9	1900	10
TE [ms]	[4.6–3.1]	2.8	2.9	4
TI [ms]	–	650	900	–
Flip angle [°]	[30–9]	8	[8–9]	8
RS-fMRI
Sequence	EPI	EPI	EPI	EPI
Imaging plane	Axial	Axial	Axial	Axial
Spatial resolution [mm3]	1.875 × 1.875 × 4	4 × 4 × 4	3 × 3 × 3	1.875 × 1.875 × 4
Acquisition matrix	128 × 128	64 × 64	64 × 64	128 × 128
Slices	30	29	50	30
TR [ms]	3000	1500	3000	3000
TE [ms]	35	32	30	35
Flip angle [°]	90	90	89	90
Volumes	200	240	140	200