The κ results of MRI readings among radiologists for each category of bones.
| Category | Signal Intensity of BMH | Signal Size of BMH | Presence of Surrounding Tissue Hyperintensity | Presence of Bony Expansion | Vertebral Compression |
|---|---|---|---|---|---|
| Spine | 0.98 (0.96–0.99) | 0.98 (0.96–0.99) | 0.99 (0.98–0.99) | NA* | 0.98 (0.97–0.99) |
| Complex bone | 0.93 (0.89–0.98) | 0.94 (0.91–0.96) | 0.97 (0.96–0.98) | 0.98 (0.97–0.99) | — |
| Flat bone | 0.93 (0.72–0.99) | 0.95 (0.87–0.99) | 0.97 (0.91–0.99) | 0.96 (0.93–0.99) | — |
| Hand/foot | 0.80 (0.63–0.94) | 0.83 (0.67–0.97) | 0.94 (0.92–0.98) | 0.99 (0.99–0.99) | — |
| Long bone | 0.75 (0.60–0.90) | — | 0.92 (0.76–0.99) | 0.97 (0.93–0.99) | — |
| Proximal epiphysis | — | 0.95 (0.87–0.99) | — | — | — |
| Proximal metaphysis | — | 0.89 (0.78–0.96) | — | — | — |
| Diaphysis | — | 0.94 (0.89–0.97) | — | — | — |
| Diaphysis contiguity | — | 0.91 (0.80–0.98) | — | — | — |
| Distal metaphysis | — | 0.81 (0.65–0.96) | — | — | — |
| Distal epiphysis | — | 0.92 (0.85–0.96) | — | — | — |
Data are mean (range).
↵* κ could not be calculated because of full agreement for all subsets within the spine. Spine includes cervical, thoracic, and lumbar vertebrae. Complex bone refers to pelvis that was divided into ilium, periacetabulum, pubis/ischium, and sacrum on each side. Flat and irregular bones included skull, mandible, clavicle, sterna/manubrium, ribs, patella, and scapula. Hands were graded as 1 unit including phalanges, metacarpal, and carpal bones on each side. Feet were divided into fore-/midfoot and hindfoot. Fore-/midfoot included phalanges, metatarsal, and tarsal bones. Hindfoot included talus and calcaneus. MRI: magnetic resonance imaging; BMH: bone marrow hyperintensity; NA: not applicable.