|
Signal intensity, echo duration and interval between signals at each site for each grade of cartilage from 20 knees |
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| Grade 0 |
Grade 1 |
Grade 2 |
Grade 3 |
|
|
|
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| Signal intensity (relative value, arbitrary units) |
||||
| Site A |
1.51 ± 0.863 |
1.33 ± 0.775 |
1.05 ± 0.807 |
-- |
| Site B |
2.60 ± 1.945 |
0.96 ± 0.433 |
0.73 ± 0.502 |
-- |
| Site C |
-- |
-- |
0.82 |
0.57 ± 0.456 |
| Site D |
1.30 |
0.72 ± 0.751 |
0.52 ± 0.483 |
0.14 |
| Site E |
1.30 ± 0.788 |
0.37 ± 0.230 |
0.46 |
-- |
| Site F |
-- |
-- |
0.84 ± 0.329 |
0.54 ± 0.402 |
| Site G |
-- |
1.18 ± 0.218 |
0.63 ± 0.420 |
0.40 ± 0.169 |
| Echo duration (μs) |
||||
| Site A |
1.05 ± 0.136 |
1.23 ± 0.224 |
1.34 ± 0.438 |
-- |
| Site B |
1.08 ± 0.201 |
1.28 ± 0.279 |
1.29 ± 0.392 |
-- |
| Site C |
-- |
-- |
1.10 |
1.11 ± 0.336 |
| Site D |
1.37 |
1.08 ± 0.301 |
1.29 ± 0.490 |
1.17 |
| Site E |
1.12 ± 0.220 |
1.34 ± 0.376 |
0.97 |
-- |
| Site F |
-- |
-- |
1.08 ± 0.083 |
1.04 ± 0.201 |
| Site G |
-- |
1.25 ± 0.220 |
1.09 ± 0.235 |
1.20 ± 0.389 |
| Interval between signals (μs) |
||||
| Site A |
2.60 ± 0.694 |
3.07 ± 0.597 |
3.04 ± 0.672 |
-- |
| Site B |
2.79 ± 0.441 |
2.82 ± 0.428 |
2.72 ± 0.562 |
-- |
| Site C |
-- |
-- |
3.05 |
1.64 ± 0.504 |
| Site D |
3.90 |
3.27 ± 0.525 |
3.34 ± 0.681 |
2.39 |
| Site E |
2.77 ± 0.794 |
3.09 ± 0.747 |
3.68 |
-- |
| Site F |
-- |
-- |
2.71 ± 0.787 |
1.87 ± 0.647 |
| Site G |
-- |
1.79 ± 0.398 |
2.67 ± 0.619 |
2.49 ± 0.553 |
|
Data presented as mean ± standard deviation. For International Cartilage Repair Society grades, see Introduction. For anatomical location of sites, see Figure 1. The number of knees is shown in Additional file 1. | ||||
Kuroki et al. Arthritis Research & Therapy 2008 10:R78 doi:10.1186/ar2452 |
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