Table 1 MR imaging protocol
|  | Hospital_1 (N = 332) | Hospital_3 (N = 63) | Hospital_4 (N = 85) | Overall (N = 480) |
|---|---|---|---|---|
Manufacture, n (%) | ||||
GE | 177 (53.3) | 43 (68.3) | 51 (60.0) | 271 (56.5) |
Philips | 45 (13.6) | 10 (15.9) | 6 (7.1) | 61 (12.7) |
SIEMENS | 107 (32.2) | 7 (11.1) | 28 (32.9) | 142 (29.6) |
UIH | 3(0.9) | 3 (4.8) | 0 (0) | 6 (1.3) |
Magnetic field, n (%) | ||||
1.5Â T | 15 (4.5) | 7 (11.1) | 3 (3.5) | 25 (5.2) |
3.0Â T | 317 (95.5) | 56 (88.9) | 82 (96.5) | 455 (94.8) |
Model name, n (%) | ||||
Achieva | 8 (2.4) | 2 (3.2) | 3 (3.5) | 13 (2.7) |
Aera | 15 (4.5) | 7 (11.1) | 0 (0) | 22 (4.6) |
DISCOVERY MR750 | 158 (47.6) | 43 (68.3) | 42 (49.4) | 243 (50.6) |
DISCOVERY MR750w | 19 (5.7) | 0 (0) | 9 (10.6) | 28 (5.8) |
Ingenia | 37 (11.1) | 8 (12.7) | 0 (0) | 45 (9.4) |
Multiva | 0 (0) | 0 (0) | 3 (3.5) | 3 (0.6) |
Prisma | 10 (3.0) | 0 (0) | 3 (3.5) | 13 (2.7) |
Skyra | 14 (4.2) | 0 (0) | 5 (5.9) | 19 (4.0) |
TrioTim | 49 (14.8) | 0 (0) | 19 (22.4) | 68 (14.2) |
uMR 790 | 3 (0.9) | 3 (4.8) | 0 (0) | 6 (1.3) |
Verio | 19 (5.7) | 0 (0) | 1 (1.2) | 20 (4.2) |
Scanning sequence, n (%) | ||||
EP | 76 (22.9) | 3 (4.8) | 27 (31.8) | 106 (22.1) |
EP/SE | 177 (53.3) | 43 (68.3) | 51 (60.0) | 271 (56.5) |
RM | 15 (4.5) | 7 (11.1) | 0 (0) | 22 (4.6) |
SE | 45 (13.6) | 10 (15.9) | 6 (7.1) | 61 (12.7) |
Missing | 19 (5.7) | 0 (0) | 1 (1.2) | 20 (4.2) |
B value, n (%) | ||||
800 | 3 (0.9) | 2 (3.2) | 1 (1.2) | 6 (1.3) |
1000 | 0 (0) | 28 (44.4) | 3 (3.5) | 31 (6.5) |
1200 | 0 (0) | 14 (22.2) | 2 (2.4) | 16 (3.3) |
1400 | 329 (99.1) | 6 (9.5) | 0 (0) | 335 (69.8) |
1500 | 0 (0) | 13 (20.6) | 67 (78.8) | 80 (16.7) |
2000 | 0 (0) | 0 (0) | 12 (14.1) | 12 (2.5) |
Slice thickness, mm | 4.0 [3.0, 5.0] | 4.0 [3.0, 5.0] | 4.0 [3.0, 5.0] | 4.0 [3.0, 5.0] |
Slice spacing, mm | 4.0 [3.0, 6.5] | 4.0 [3.3, 5.0] | 4.0 [3.0, 5.5] | 4.0 [3.0, 6.5] |
Pixel spacing, mm | 0.9 [0.8, 4.2] | 0.9 [0.8, 2.1] | 0.9 [0.6, 3.6] | 0.9 [0.6, 4.2] |
Matrix size—rows | 256 [59, 283] | 256 [96, 256] | 256 [53, 256] | 256 [53, 283] |
Matrix size—columns | 256 [96, 256] | 256 [96, 256] | 256 [136, 256] | 256 [96, 256] |
FOV 1, mm | 225 [55, 533] | 240 [90, 533] | 240 [52, 533] | 240 [52, 533] |
FOV2, mm | 225 [75, 533] | 240 [90, 533] | 240 [134, 533] | 240 [75, 533] |
TR, ms | 2669 [2000, 6759] | 4077 [2200, 6100] | 2500 [2500, 5300] | 2671 [2000, 6759] |
TE, ms | 61 [51, 90] | 73 [62, 93] | 91 [57, 91] | 61 [51, 93] |