TABLE 1.
Summary of key acquisition parameters and the range of manually traced WMH lesion load in the three cohorts.
| Dataset | Institute | Scanner | T1‐weighted voxel size (TR/TE/TI) | FLAIR voxel size (TR/TE/TI) | Train | Test | WMH load range in ml |
|---|---|---|---|---|---|---|---|
| MRi‐Share | Bordeaux University | 3 T Siemens Prisma | 1.00 × 1.00 × 1.00 mm3 (2000/2.0/880 ms) | 1.00 × 1.00 × 1.00 mm3 (5000/394/1800 ms) | 40 | 10 | 0–1.8 |
| MWC | UMC Utrecht | 3 T Philips Achieva | 1.00 × 1.00 × 1.00 mm3 (7.9/4.5/—ms) | 0.96 × 0.95 × 3.00 mm3 (11,000/125/2800 ms) | 17 | 3 | 0.8–75.0 |
| VU Amsterdam | 3 T GE Signa HDxt | 0.94 × 0.94 × 1.00 mm3 (7.8/3.0/−−ms) | 0.98 × 0.98 × .20 mm3 (8000/126/2340 ms) | 17 | 3 | ||
| NUHS Singapore | 3 T Siemens TrioTim | 1.00 × 1.00 × 1.00 mm3 (2300/1.9/900 ms) | 1.00 × 1.00 × 3.00 mm3 (9000/82/2500 ms) | 16 | 4 | ||
| UKB | UKB Imaging Centre | 3 T Siemens Skyra | 1.00 × 1.00 × 1.00 mm3 (2000/2.01/800 ms) | 1.05 × 1.00 × 1.00 mm3 (5000/395/1800 ms) | — | 11 | 0.1–22.5 |
| Total | 90 | 31 |
Abbreviations: MWC, MICCAI 2017 WMH segmentation challenge dataset; NUHS, the National University Health System; TE, echo time; TI, inversion time; TR, repetition time; UKB, UK Biobank; UMC, the University Medical Center; VU, Vrije Universiteit University Medical Centre.