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Table 1 MRI protocols for T1 mapping and T2 mapping with turbo spin-echo and sensitivity encoding acceleration, at 1.5, 3, and 7 T

From: Detecting low blood concentrations in joints using T1 and T2 mapping at 1.5, 3, and 7 T: an in vitro study

Field strength

T1 mapping

T2 mapping*

1.5 T

3 T

7 T

1.5 T

3 T

7 T

Number of slices

11

11

11

5

5

5

Number of inversions

11

11

11

32

32

32

Voxel size (mm)

0.8

0.8

0.8

0.8

0.8

0.8

Field of view (mm)

128 × 128

128 × 128

128 × 128

128 × 128

128 × 128

128 × 128

Slice thickness (mm)

5

5

5

5

5

5

Inversion time spacing (ms)

315

315

907

Repetition time (ms)

10,000

10,000

10,000

3000

3000

7800

Echo time (ms)

7.8

7.8

4.33

20–950

20–950

30–960

Flip angle

15°

15°

15°

90°

90°

90°

EPI frequency encoding bandwidth (Hz)

614.6

614.6

1179

Readout bandwidth (Hz/pixel)

77.1

77.1

144.2

227

227

208

EPI factor

5

5

5

Parallel reduction factor in-plane

2

2

2

2

2

2

Scan duration (s)

220

220

220

252

168

632

  1. EPI Echo-planar imaging, *with turbo-spin echo and sensitivity encoding acceleration