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Table 1: Heterogeneous scanning parameters used for FLAIR sequences in training and validation samples, showing the number of study subjects in each category^{^a}
Summary Training (n = 295) Validation (n = 92)
Field strength 
    1.5T 230 (78.0%) 57 (62.0%)
    3T 65 (22.0%) 35 (38.0%)
Dimension 
    2D 287 (97.3%) 81 (88.0%)
    3D 8 (2.7%) 11 (12.0%)
Manufacturer/model 
    GE Healthcare^{^b} 
        Discovery MR750w 4 (1.4%) 3 (3.3%)
        Genesis Signa 20 (6.8%) 6 (6.5%)
        Optima MR450w 15 (5.1%) 1 (1.1%)
        Signa Excite 20 (6.8%) 7 (7.6%)
        Signa HDxt 14 (4.7%) 7 (7.6%)
    Phillips^{^c} 
        Intera 2 (0.7%) 1 (1.1%)
    Siemens^{^d} 
        Magnetom Aera 15 (5.1%) 2 (2.2%)
        Avanto 39 (13.2%) 8 (8.7%)
        Magnetom Espree 83 (28.1%) 19 (20.1%)
        Magnetom Essenza 9 (3.1%) 1 (1.1%)
        Magnetom Skyra 8 (2.7%) 8 (8.7%)
        Magnetom Symphony 4 (1.4%) 3 (3.3%)
        Magnetom Symphony Tim 5 (1.7%) 1 (1.1%)
        Tim Trio 37 (12.5%) 11 (20.0%)
        Magnetom Verio 16 (5.4%) 13 (14.1%)
Toshiba^{^e} 
        Titan 4 (1.4%) 1 (1.1%)
TE (ms) 
    Minimum 86 82
    Median 136 136
    Maximum 396 398
TR (ms) 
    Minimum 5000 5000
    Median 9000 9000
    Maximum 12,000 12,000
↵a The percentage of the total training or validation sample is in parentheses.
↵b Milwaukee, Wisconsin.
↵c Best, the Netherlands.
↵d Erlangen, Germany.
↵e Toshiba Medical Systems, Tokyo, Japan.