Table 1:

Summary of sequence parameters of the 6 MR units used

Equipment	Coil Type	Field Strength, T	Gd-Enhanced T1-Weighted Sequence			T2-Weighted Sequence
Equipment	Coil Type	Field Strength, T	Sequence Type	Section Thickness, mm	In-Plane Resolution, mm × mm	Sequence Type	Section Thickness, mm	In-Plane Resolution, mm × mm
Siemens Magnetom	Birdcage head	1	SE	3	0.80 × 0.80	3D CISS	0.7	0.65 × 0.65
Siemens Magnetom Vision	Birdcage head	1.5	SE	2	0.90 × 0.90	3D CISS	0.7	0.37 × 0.37
Siemens Avanto	Surface coils	1.5	MPRAGE	1	0.45 × 0.45	3D-TSE	0.5	0.53 × 0.53
GE Signa	Surface coils	1.5	FSE	2	0.35 × 0.35	3D-FSE	0.8	0.39 × 0.39
Philips Intera	Surface coils	1.5	3D-FFE	1.2 every 0.6	0.70 × 0.70	DRIVE^25,26	0.7 every 0.35	0.36 × 0.36
Philips Achieva	Surface coils	3	3D-FFE	1.2 every 0.6	0.60 × 0.60	DRIVE	0.6 every 0.3	0.43 × 0.43

Note:—SE indicates spin-echo; MPRAGE, magnetization-prepared rapid acquisition of gradient echo; FFE, fast-field echo; CISS, constructive interference in steady state; TSE, turbo spin-echo; FSE, fast spin-echo; DRIVE, driven equilibrium; Gd, gadolinium.