Table 4 MRI sequence parameters

Voxel resolution (mm³)

1.1 × 1.1 × 1.1

1.1 × 1.1 × 1.1

1.1 × 1.1 × 1.1

3 × 3 × 4

0.86 × 0.86 × 1.5

2.5 × 2.5 × 2.5

3 × 3 × 3

3.75 × 3.75 × 4

Matrix size

256 × 256 × 208

256 × 256 × 176

256 × 256 × 176

64 × 64 × 36

256 × 192 × 96

96 × 96 × 58

64 × 64 × 55

64 × 56 × 36

FoV (read x PE) (mm)

282 × 282

282 × 282

282 × 282

192 × 192

220 × 165

240 × 240

192 × 192

240 × 210

Slice coverage (mm)

229

194

194

144

144

145

165

144

Orientation

Sagittal

Sagittal

Sagittal

Transverse obl

Transverse obl

Transverse obl

Transverse obl

Transverse obl

PE direction

A > > P

A > > P

A > > P

A > > P

R > > L

A > > P

R > > L

A > > P

TE (ms)

2.92

409

402

30

4.92; 9.84; 19.2

103

4.92; 7.38

20.26

TR (ms)

2000

3200

5000

2020

27

8000

688

4000

Flip angle (°)

8

Variable

Variable

75

15

90/180/180

60

90/160/160/160...

Acq bandwidth (Hz/pix)

240

751

751

2112

400/400/140

1578

260

2298

Parallel imaging

×2

×2

×2

×2

×2

×2

None

None

Total scan time

5 min 06 s

4 min 43 s

6 min 27 s

9 min 27 s

3 min 48 s

10 min 16 s; 5 min 28 s

1 min 31 s

5 min 20s

Other sequence-specific parameters

Water selective excitation pulse

TI = 870 ms

Water selective excitation pulse

Turbo factor 141

Slice TF 2

Water selective excitation pulse

Turbo factor 141

Slice TF 2

T2 sel IR

TI = 1800 ms

Fat saturation

277 volumes

\( \raisebox{1ex}{$7$}\!\left/ \!\raisebox{-1ex}{$8$}\right. \) partial Fourier along PE1/2

Flow comp for first TE

Monopolar read gradient

2 non-zero b- values:

b = 2000 s/mm² 64 dir

b = 700 s/mm² 32 dir

12 x b = 0 s/mm² interspersed

¾ partial Fourier

2D multi-slice dual gradient echo

10 averages

pCASL labeling

4-shot 3D GRASE

Turbo Factor 14

EPI Factor 28

Labeling duration 1.8 s

Post-labeling delay 1.8 s

Background suppression