Table 1.
Signal contribution at each b-values of the slow and fast compartments using bi-exponential decay model and averaged 50 scans of 18 young healthy volunteers
| b-value (s/mm2) | Average measured SI (± SD) | Predicted signal by full Fitting | Predicted signal by Segmented Fitting | ||||
|---|---|---|---|---|---|---|---|
|
|
|
||||||
| TSI | Cslow/TSI | Cfast/TSI | TSI | Cslow/TSI | Cfast/TSI | ||
| 0 | 100.0 ± 0.0 | 100.0 | 83.1 | 16.92 | 100.0 | 76.7 | 23.26 |
| 3 | 90.5 ± 2.7 | 92.3 | 89.7 | 10.26 | 96.4 | 78.9 | 21.13 |
| 10 | 86.3 ± 3.3 | 84.6 | 97.1 | 2.89 | 89.9 | 83.3 | 16.72 |
| 25 | 82.7 ± 4.2 | 80.9 | 99.8 | 0.17 | 81.8 | 90.2 | 9.76 |
| 30 | 81.4 ± 4.0 | 80.3 | 99.9 | 0.06 | 80.1 | 91.9 | 8.08 |
| 40 | 79.8 ± 3.5 | 79.4 | 100.0 | 0.01 | 77.6 | 94.5 | 5.50 |
| 45 | 78.9 ± 3.9 | 78.9 | 100.0 | 0.00 | 76.7 | 95.5 | 4.52 |
| 50 | 78.2 ± 4.0 | 78.5 | 100.0 | 0.00 | 75.9 | 96.3 | 3.71 |
| 80 | 74.6 ± 4.1 | 75.8 | 100.0 | 0.00 | 72.6 | 98.9 | 1.11 |
| 200 | 63.6 ± 3.9 | 66.1 | 100.0 | 0.00 | 64.0 | 100.0 | 0.01 |
| 300 | 57.3 ± 3.6 | 59.0 | 100.0 | 0.00 | 57.8 | 100.0 | 0.00 |
| 400 | 51.3 ± 3.0 | 52.6 | 100.0 | 0.00 | 52.1 | 100.0 | 0.00 |
| 500 | 46.6 ± 3.4 | 46.9 | 100.0 | 0.00 | 47.1 | 100.0 | 0.00 |
| 600 | 42.3 ± 2.9 | 41.9 | 100.0 | 0.00 | 42.5 | 100.0 | 0.00 |
| 700 | 38.7 ± 2.7 | 37.3 | 100.0 | 0.00 | 38.3 | 100.0 | 0.00 |
| 800 | 35.2 ± 2.4 | 33.3 | 100.0 | 0.00 | 34.6 | 100.0 | 0.00 |
Average measured signal intensity (SI): average of the normalized measured liver signal of 50 scans. TSI: Total diffusion weighted imaging signal predicted by the model. Cslow and Cfast are related to the true diffusion compartment signal [(1-PF) × exp (-b × Dslow)] and the pseudo-diffusion compartment signal [PF × exp (-b × Dfast)] respectively. Ci/TSI: Signal contribution of the compartment i in the total signal predicted signal, in %. [reproduced with permission from reference [67].