Table 2.
Descriptive and reproducibility data for DTI data in eight human thigh muscles. For each variable, the mean and SD are given in the top row; significant differences are indicated in the middle row; and the absolute and relative RC values are given in the bottom row. The units of the diffusivities are 10-3 mm2/s and the units of SD(v1) are degrees. A hyphen (-) indicates lack of significance.
| RF | VL | VI | VM | BF | ST | SM | AD | ||
|---|---|---|---|---|---|---|---|---|---|
| λ1 | Mean (SD) | 2.11 (0.08) | 2.18 (0.10) | 2.21 (0.09) | 2.08 (0.07) | 2.10 (0.06) | 2.15 (0.07) | 2.11 (0.06) | 2.07 (0.06) |
| Significance: | - | >VM, BF, AD | >VM, BF, AD | <VL, VI | <VL, VI | >AD | >AD | <VL, VI, ST, SM | |
| RC (% of Mean) | 0.17 (8.1%) | 0.24 (11%) | 0.2 (9.3%) | 0.18 (8.8%) | 0.19 (9.2%) | 0.14 (6.6%) | 0.21 (10%) | 0.11 (5.5%) | |
| λ2 | Mean (SD) | 1.67 (0.08) | 1.90 (0.14) | 1.83 (0.12) | 1.73 (0.09) | 1.57 (0.07) | 1.55 (0.08) | 1.64 (0.09) | 1.69 (0.07) |
| Significance: | >BF, ST<VL, VI | >RF, VM, BF, ST, SM, AD | >RF, BF, ST, SM, AD | >BF, ST, SM | >AD; <RF, VL, VI, VM | <RF, VL, VI, VM, AD; >SM | <VL, VI, VM; <ST | >ST; <VL, VI, BF | |
| RC (% of Mean) | 0.13 (7.8%) | 0.42 (22.1%) | 0.2 (11.2%) | 0.13 (7.7%) | 0.16 (10.3%) | 0.16 (10.5%) | 0.18 (11.1%) | 0.08 (4.9%) | |
| λ3 | Mean (SD) | 1.51 (0.05) | 1.64 (0.08) | 1.64 (0.09) | 1.56 (0.06) | 1.42 (0.07) | 1.40 (0.07) | 1.48 (0.06) | 1.54 (0.06) |
| Significance: | >BF, ST<VL, VI | >RF, VM, BF, ST, SM, AD | >RF, BF, ST, SM, AD | >BF, ST | <RF, VL, VI, VM | <RF, VL, VI, VM, AD | <VL, VI | >ST<VL, VI | |
| RC (% of Mean) | 0.11 (7.3%) | 0.22 (13.3%) | 0.14 (8.8%) | 0.08 (5.2%) | 0.15 (10.6%) | 0.16 (11.6%) | 0.13 (8.8%) | 0.10 (6.7%) | |
| ADC | Mean (SD) | 1.76 (0.07) | 1.91 (0.10) | 1.89 (0.10) | 1.79 (0.07) | 1.70 (0.07) | 1.70 (0.06) | 1.75 (0.07) | 1.77 (0.06) |
| Significance: | >ST<VL, VI | >RF, VM, BF, ST, SM, AD | >RF, VM, BF, ST, SM, AD | >BF, ST, SM; <VI | >AD; <VL, VI, VM | <RF, VL, VI, VM; >SM | <VL, VI, VM; <ST | <VL, VI, BF | |
| RC (% of Mean) | 0.13 (7.4%) | 0.28 (14.7%) | 0.17 (9.2%) | 0.12 (6.8%) | 0.14 (8.4%) | 0.14 (8.3%) | 0.16 (9.2%) | 0.08 (4.7%) | |
| FA | Mean (SD) | 0.18 (0.01) | 0.14 (0.02) | 0.16 (0.02) | 0.15 (0.01) | 0.21 (0.02) | 0.23 (0.02) | 0.19 (0.01) | 0.16 (0.01) |
| Significance: | >VL, VI, VM, AD; <BF, ST | <RF, BF, ST, SM | <RF | <RF, BF, ST, SM | >RF, VL, VM, AD; <ST | >RF, VL, VM, BF, SM, AD | >VL, VM, AD; <ST | <RF, BF, SM; <ST | |
| RC (% of Mean) | 0.03 (16.7%) | 0.04 (28.6%) | 0.03 (18.8%) | 0.03 (20.0%) | 0.06 (30.0%) | 0.05 (21.7%) | 0.02 (10.5%) | 0.03 (18.8%) | |
| SD(v1) | Mean (SD) | 8.1 (2.0) | 14.9 (5.2) | 10.2 (4.0) | 9.2 (2.9) | 4.7 (1.8) | 3.5 (0.1) | 5.4 (2.9) | 9.5 (3.5) |
| RC (% of Mean) | 10.8 (133%) | 17.1 (114%) | 6.1 (59.8%) | 9.2 (100%) | 2.7 (57.5%) | 2.1 (60.0%) | 3.7 (68.5%) | 11.3 (119%) |