Table. 3.
Visual grading characteristic analysis, comparing ratings between 7T and 3T MR. An AUCVGC of 0.5 shows that the image quality on average is graded equally at 7T and 3T. An AUCVGC of > 0.5 shows that the image quality is superior at 7T. An AUCVGC of < 0.5 shows that the image quality is superior at 3T. If there is a statistically significant difference between grading, the confidence interval does not contain 0.5. The table also includes the median and average grades for each parameter
| VGC Analysis | AUCVGC (95 % CI) | p value |
|---|---|---|
|
TFCC, radial attachment (3D) TFCC, radial attachment (2D) |
0.70 (0.61–0.78) 0.62 (0.53–0.71) |
< 0.0000001 0.011 |
|
TFCC, ulnar styloid attachment (3D) TFCC, ulnar styloid attachment (2D) |
0.74 (0.67–0.81) 0.68 (0.60–0.76) |
< 0.0000001 < 0.0000001 |
|
TFCC, foveal attachment (3D) TFCC, foveal attachment (2D) |
0.75 (0.69–0.81) 0.67 (0.58–0.76) |
< 0.0000001 0.0025 |
|
SLL dorsal portion (3D) SLL dorsal portion (2D) |
0.73 (0.68–0.78) 0.76 (0.66–0.85) |
< 0.0000001 < 0.0000001 |
|
SLL palmar portion (3D) SLL palmar portion (2D) |
0.65 (0.56–0.72) 0.72 (0.62–0.81) |
0.0075 0.0025 |
|
LTL dorsal portion (3D) LTL dorsal portion (2D) |
0.66 (0.60–0.72) 0.71 (0.61–0.81) |
0.0005 0.0005 |
|
LTL palmar portion (3D) LTL palmar portion (2D) Trabeculae of the capitate bone Cartilage (triquetrum/hamatum) (3D) Cartilage (triquetrum/hamatum) (2D) Tendon (ECU) (3D) Tendon (ECU) (2D) Median nerve (3D) Median nerve (2D) Ulnar nerve (3D) Ulnar nerve (2D) |
0.65 (0.55–0.74) 0.65 (0.59–0.72) 0.87 (0.81–0.91) 0.84 (0.79–0.88) 0.73 (0.65–0.81) 0.73 (0.63–0.83) 0.78 (0.67–0.87) 0.80 (0.72–0.87) 0.82 (0.72–0.91) 0.80 (0.72–0.86) 0.88 (0.78–0.94) |
0.022 0.001 < 0.0000001 < 0.0000001 < 0.0000001 0.0005 < 0.0000001 < 0.0000001 < 0.0000001 < 0.0000001 < 0.0000001 |
| Edge sharpness (image quality) | 0.74 (0.68–0.80) | < 0.0000001 |
| Perceived tissue contrast (image quality) | 0.73 (0.67–0.78) | < 0.0000001 |
| Artefacts (image quality) | 0.52 (0.42–0.60) | 0.714 |
2D, two-dimensional; 3D, three-dimensional; AUC, area under the curve; ECU, extensor carpi ulnaris; LTL, lunotriquetral ligament; SLL, scapholunate ligament; TFCC, triangular fibrocartilage complex; VGC, visual grading characteristics