Table 2 Acquisition parameters for MR imaging

TE

2.670 ms

33.580 ms

1.435 ms

TR

100 ms

5551.773 ms

2.870 ms

Flip angle

30.0°

-

30.0°

Spatial resolution

0.43 × 0.43

0.3 × 0.3 mm²

0.6 × 0.6 mm²

Matrix size

256 × 256

128 × 128

64 × 64

FOV

110 × 100 mm²

38.4 × 38.4 mm²

38.4 × 38.4 mm²

Slice thickness

1 mm

1 mm

1 mm

Slice orientation

Coronal

Axial

Axial

Number of averages

1

1

1

Number of repetitions

1

1

Number of CEST spectra

-

-

4 preinjection, 6 postinjection

Saturation power

-

-

3 µT

Saturation pulses (pulse duration)

-

-

60 (100 ms)

Number of saturation frequencies

-

-

40

Saturation frequency range (increments), Hz

-

-

-30000

-4500 to -3600 (900)

-3600 to 0 (600)

0 to 2100 (75)

2100 to 2700 (600)

2700 to 4500 (900)

Total acquisition time

12 s 800 ms

1 min 28 s 828 ms

44 min 22 s