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Imaging parameters and examination times
Sequence Sagittal T1WI Sagittal T2WI Sagittal T2TIRM Axial T2* GRE
TR (ms) 600 3000 3000 1300
TE (ms) 10 109 32 14
Flip angle 160° 180° 140° 30°
Section thickness (mm) 3 3 3 3
Gap (mm) 3.3 3.3 3.3 3.3
NEX 3 2 1 1
ETL 53 31 7 1
Matrix (reconstruction) 384 × 306 320 × 320 640 × 640 512 × 512
Matrix (acquisition) 384 × 260 320 × 256 320 × 240 256 × 256
FOV 191 × 240 240 × 240 240 × 240 160 × 160
Time (min/sec) 
    Nonaccelerated (original) 03:10 03:06 03:24 08:19
        2 Averages (% reduction) 02:06 (33.7%) 
        1 average 01:03 (67%) 01:30 (54%) 
Acc 2 01:36 (49.5%) 01:31 (53.4%) 01:48 (47%) 04:24 (47%)
Acc 3 01:04 (66.4%) 01:07 (66%) 01:15 (63%) 03:06 (63%)
Acc 4 01:00 (68.8%) 00:55 (67.6%) 00:57 (72%) 02:27 (74.5%)

Note:—ETL indicates echo-train length; Acc, acceleration factor.

Sequence	Sagittal T1WI	Sagittal T2WI	Sagittal T2TIRM	Axial T2* GRE
TR (ms)	600	3000	3000	1300
TE (ms)	10	109	32	14
Flip angle	160°	180°	140°	30°
Section thickness (mm)	3	3	3	3
Gap (mm)	3.3	3.3	3.3	3.3
NEX	3	2	1	1
ETL	53	31	7	1
Matrix (reconstruction)	384 × 306	320 × 320	640 × 640	512 × 512
Matrix (acquisition)	384 × 260	320 × 256	320 × 240	256 × 256
FOV	191 × 240	240 × 240	240 × 240	160 × 160
Time (min/sec)
Nonaccelerated (original)	03:10	03:06	03:24	08:19
2 Averages (% reduction)	02:06 (33.7%)
1 average	01:03 (67%)	01:30 (54%)
Acc 2	01:36 (49.5%)	01:31 (53.4%)	01:48 (47%)	04:24 (47%)
Acc 3	01:04 (66.4%)	01:07 (66%)	01:15 (63%)	03:06 (63%)
Acc 4	01:00 (68.8%)	00:55 (67.6%)	00:57 (72%)	02:27 (74.5%)