Table 5 Datasets description including MR acquisition parameters.

From: Standardization of brain MR images across machines and protocols: bridging the gap for MRI-based radiomics

Parameters

DATASET1

DATASET2a

Sequence

T1w-gd

T2w-flair

T1w-gd

T2w-flair

Manufacturer model

GE Signa HDxt

GE Discovery MR750

GE Signa HDxt

GE Discovery MR750

Philips AchievaSiemens (17)

GE Signa Genesis (52)

GE Signa Excite (71)

GE Signa HDx (3)

GE Signa HDxt (8)

Siemens Magnetom Vision (10)

Hitachi Oasis (1)

Philips Ingenia (6)

Philips Intera (6)

Philips Intera Achieva (1)

Siemens Avanto (9)

Siemens Skyra (1)

Siemens Symphony (10)

Siemens Trio (2)

Siemens TrioTim (3)

Siemens Verio (5)

Undefined (38)

Cohort

    

LGG

HGG

LGG

HGG

Magnetic field strength (T)

1.5

3.0

1.5

3.0

1.16 (N = 1), 1.5 (N = 51), 3.0 (N = 47), undefined (N = 9)

0.5 (N = 2), 1 (N = 1), 1.5 (N = 82), 3.0 (N = 44) undefined (N = 6)

1.16 (N = 1), 1.5 (N = 51), 3.0 (N = 47), undefined (N = 9)

0.5 (N = 2), 1 (N = 1), 1.5 (N = 82), 3.0 (N = 44) undefined (N = 6)

TR (ms)

11

10

9802

8000

1106 [6–5500]

890 [5–3286]

9686 [6000–11,000]

9581 [1000–11,000]

TE (ms)

4

3

157

123

7 [3–17]

9 [2–105]

128 [94–158]

135 [74–355]

Slice thickness (mm)

1.4

1.2

5.0

3.5

2.4 [1.0–5.0]

3.2 [1.0–6.0]

3.8 [2.0–5.0]

4.14 [1.2–6.0]

Pixel spacing (mm)

0.49 × 0.49

0.47 × 0.47

0.47 × 0.47

0.43 × 0.43

0.68 × 0.68 [0.39 × 0.39–1.02 × 1.02]

0.77 × 0.77 [0.43 × 0.43–1.02 × 1.02]

0.74 × 0.74 [0.39 × 0.39–1.01 × 1.01]

0.77 × 0.77 [0.43 × 0.43–1.01 × 1.01]

Matrix dimensions

288 × 288

320 × 288

256 × 192

352 × 192

303 × 2130 [224 × 134–512 × 300]

283 × 204 [224 × 134–512 × 300]

306 × 214 [256 × 112–512 × 256]

283 × 194 [192 × 98–512 × 320]

FOV (mm)

250

240

240

220

244 [200–260]

235 [200–260]

237 [200–260]

228 [200–260]

Pixel bandwidth (Hz/px)

65.12

65.12

122

195

166 [81–250]

162 [61–355]

153 [61–358]

170 [61–750]

Flip angle (°)

17

15

90

90

53 [8–90]

70 [8–90]

100 [90–180]

102 [90–180]

  1. TR repetition time, TE echo time, FOV field of view.
  2. aSome metadata information are missing (< 10% of all patients). For the DATASET2, values representations are: mean [min–max]. The number of patients for each MR system is indicated in brackets. Additional information about DATASET2 are available in Bakas et al. 34,35.
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