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Parameters of MR imaging acquisitions
3D FLAIR MPRAGE
Standard Fast Ultrafast Shortest
TR (ms) 7000 5000 4000 3000 6.3
TE (ms)/effective TE (ms) 445.5/145.0 445.5/145.0 445.5/145.0 445.5/145.0 2.8
TI (ms) 2070 1580 1270 910 950
BW (Hz) 558 558 558 558 279
Echo space (ms) 4.5 4.5 4.5 4.5 
FOV (mm) 230 × 230 230 × 230 230 × 230 230 × 230 230 × 230
Matrix 224 × 224 224 × 224 224 × 224 224 × 224 224 × 224
Thickness (mm) 1 1 1 1 1
Parallel imaging 2.0 × 3.0 2.0 × 3.0 2.0 × 3.0 2.0 × 3.0 1.8 × 1.5
Frequency oversampling 1.4 1.2 1.2 1.2 1.2
Half Fourier 85% 70% 70% 
Flip angle 90° 90° 90° 90° 9°
Refocus angle VFA VFA VFA VFA 
Shot interval (ms) 2500
Recovery time (ms) 744
Scan time (minute : second) 4:54 2:35 1:40 1:15 6:18
Note:—VFA indicates variable flip angle; BW, Bandwidth.

	3D FLAIR				MPRAGE
	Standard	Fast	Ultrafast	Shortest	MPRAGE
TR (ms)	7000	5000	4000	3000	6.3
TE (ms)/effective TE (ms)	445.5/145.0	445.5/145.0	445.5/145.0	445.5/145.0	2.8
TI (ms)	2070	1580	1270	910	950
BW (Hz)	558	558	558	558	279
Echo space (ms)	4.5	4.5	4.5	4.5
FOV (mm)	230 × 230	230 × 230	230 × 230	230 × 230	230 × 230
Matrix	224 × 224	224 × 224	224 × 224	224 × 224	224 × 224
Thickness (mm)	1	1	1	1	1
Parallel imaging	2.0 × 3.0	2.0 × 3.0	2.0 × 3.0	2.0 × 3.0	1.8 × 1.5
Frequency oversampling	1.4	1.2	1.2	1.2	1.2
Half Fourier		85%	70%	70%
Flip angle	90°	90°	90°	90°	9°
Refocus angle	VFA	VFA	VFA	VFA
Shot interval (ms)					2500
Recovery time (ms)					744
Scan time (minute : second)	4:54	2:35	1:40	1:15	6:18