Table 2.
Bi-exponential fit slope constants for probe-derived, image-derived and manually sampled input functions
| Subject | Mean | SD | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||
| Slope 1 | ||||||||||
| Probe IF | 4.609 | 4.181 | 3.646 | 3.470 | 4.989 | 3.552 | 3.181 | 3.658 | 3.911 | 0.582 |
| Manual IF | 7.627 | 4.847 | 3.646 | 7.746 | 5.582 | 6.038 | 3.215 | 4.591 | 5.411 | 1.570 |
| Image-derived IF | 11.626 | 7.983 | 8.705 | 10.502 | 9.327 | 6.343 | 5.888 | 8.149 | 8.565 | 1.815 |
| Slope 2 | ||||||||||
| Probe IF | 0.048 | 0.038 | 0.046 | 0.028 | 0.047 | 0.025 | 0.039 | 0.038 | 0.039 | 0.008 |
| Manual IF | 0.042 | 0.018 | 0.050 | 0.043 | 0.039 | 0.031 | 0.008 | 0.026 | 0.032 | 0.013 |
| Image-derived IF | 0.095 | 0.068 | 0.051 | 0.056 | 0.082 | 0.040 | 0.059 | 0.072 | 0.065 | 0.017 |
IF, input function; SD, standard deviation.