AMADEUS feature | Score | Frequency | Percent |
---|---|---|---|
Area measurement | |||
Defect size | |||
No defect | 40 | 0 | 0 |
≤ 1 cm2 | 35 | 8 | 16 |
> 1 to ≤ 2 cm2 | 30 | 18 | 36 |
> 2 to ≤ 4 cm2 | 20 | 21 | 42 |
> 4 to | 10 | 1 | 2 |
≤ 6 cm2 | 0 | 2 | 4 |
Defect depth | |||
(n) No defect | 20 | 0 | 0 |
(a) Signal alteration | 15 | 2 | 4 |
(b) Partial-thickness defect | 10 | 20 | 40 |
(c) Full-thickness defect | 0 | 28 | 56 |
Underlying structures | |||
Subchondral bone defect | |||
A. no defect | 30 | 35 | 70 |
B. bony defect/cyst ≤ 5-mm depth | 20 | 6 | 12 |
C. bony defect/cyst > 5-mm depth | 0 | 9 | 18 |
Addendum—potential fourth digit | |||
No defect-associated BME | 10 | 27 | 54 |
E. defect-associated BME | 0 | 23 | 46 |
AMADEUS total score | 100 | Mean 58.4 (± 20.4) | |
AMADEUS grade | (0 worst, 100 best) | ||
Grade I | > 75 | 9 | 18 |
Grade II | > 50 and ≤ 75 | 25 | 50 |
Grade III | > 25 and ≤ 50 | 11 | 22 |
Grade IV | ≤25 | 5 | 10 |