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Diagnostic image-quality ratings by static field strength of scanner and overall^{^a}
Diagnostic Quality^{^b} 1.5T Scanner 3T Scanner Overall (1.5T + 3T)
Syn (N = 392) Con (N = 392) Syn (N = 371) Con (N = 371) Syn (N = 763) Con (N = 763)
Acceptable for diagnostic use (3,4,5) 380 (97%) 387 (99%) 354 (95%) 358 (96%) 734 (96%) 745 (98%)
    Excellent (rated 5) 64 (16%) 183 (47%) 37 (10%) 103 (28%) 101 (13%) 286 (37%)
    Good (rated 4) 266 (68%) 170 (43%) 230 (62%) 199 (54%) 496 (65%) 369 (48%)
    Acceptable (rated 3) 50 (13%) 34 (9%) 87 (23%) 56 (15%) 137 (18%) 90 (12%)
Unacceptable for diagnostic use (1,2) 12 (3%) 5 (1%) 17 (5%) 13 (4%) 29 (4%) 18 (2%)
Poor (rated 2) 10 (3%) 5 (1%) 16 (4%) 12 (3%) 26 (3%) 17 (2%)
Unacceptable (rated 1) 2 (1%) 0 1 (0.3%) 1 (0.3%) 3 (0.4%) 1 (0.1%)
Note:—Syn indicates synthetic MR imaging; Con = conventional MR imaging (control).
↵a All data are shown as n (n/N%), where n is the count and N is the total reads per category (defined in the upper row of this table).
↵b Five-point scale.