Table 3.
Treadmill performance testing inside and outside of the MRI room. Values represent average ± standard deviation across all 5 subjects. Only minimal differences in speed and elevation performance were observed between operation outside and inside the MRI room.
| Desired | Outside MRI Room | Inside MRI Room | Inside vs. Outside | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Speed | Elevation | Speed | Elevation | Speed | Elevation | Speed | Elevation | |||||
| Actual | Error | Actual | Error | Actual | Error | Actual | Error | Difference | ||||
| Stage | (MPH) | (deg) | (MPH) | (%) | (deg) | (%) | (MPH) | (%) | (deg) | (%) | (%) | |
| 1 | 1.7 | 5.7 | 1.7 ± 0.0 | 2.2 | 5.8 ± 0.1 | 1.5 | 1.8 ± 0.0 | 4.1 | 5.8 ± 0.1 | 2.3 | 1.9 | 0.8 |
| 2 | 2.5 | 6.8 | 2.5 ± 0.1 | 2.2 | 6.9 ± 0.0 | 1.3 | 2.5 ± 0.1 | 2.3 | 6.9 ± 0.2 | 1.6 | 2.4 | -0.5 |
| 3 | 3.4 | 8.0 | 3.4 ± 0.1 | 1.8 | 8.0 ± 0.1 | 1.0 | 3.4 ± 0.1 | 1.7 | 8.1 ± 0.1 | 0.9 | 1.3 | 0.7 |
| 4 | 4.2 | 9.1 | 4.1 ± 0.1 | 1.7 | 9.2 ± 0.1 | 1.0 | 4.2 ± 0.1 | 1.6 | 9.2 ± 0.1 | 1.2 | 1.8 | 0.0 |
| 5 | 5.0 | 10.2 | 5.0 ± 0.1 | 1.1 | 10.2 ± 0.1 | 0.6 | 5.0 ± 0.1 | 1.6 | 10.2 ± 0.1 | 1.0 | 0.6 | -0.1 |
| 6 | 5.5 | 11.3 | 5.4 ± 0.1 | 1.6 | 11.0 ± 0.0 | 2.6 | 5.5 ± 0.1 | 1.7 | 11.0 ± 0.1 | 2.8 | 1.6 | -0.2 |