Table 1. Tissue parameter sets.
Parameter sets 1–4 were chosen based on parameter values in previous mcDESPOT studies (15, 18, 19) and with varying slow-decaying T1/T2 ratios and exchange rates in order to display different SSFP signal characteristics. Set 5 represents a scenario in which the T1/T2 ratios of each compartment are equal. Sets 6–8 were used with a range of fF values and varying one other parameter within the range provided. Note that set 8 with kFS = 0 represents two pools in slow exchange. Sets 9–11 demonstrate by example different tissue models that result in effectively identical mcDESPOT signals.
| Parameter Set | T1,S (ms) | T1,F (ms) | T2,S (ms) | T2,F (ms) | fF (%) | kFS (s−1) |
|---|---|---|---|---|---|---|
| 1 | 800 | 450 | 100 | 20 | 20 | 10 |
| 2 | 800 | 450 | 100 | 20 | 20 | 2.5 |
| 3 | 1500 | 450 | 100 | 20 | 20 | 10 |
| 4 | 1500 | 450 | 100 | 20 | 20 | 2.5 |
| 5 | 2250 | 450 | 100 | 20 | 20 | 10 |
| 6 | 800 | 450 | 75 – 150 | 20 | 5 – 45 | 10 |
| 7 | 800 | 450 | 100 | 15 – 30 | 5 –45 | 10 |
| 8 | 800 | 450 | 100 | 20 | 5 –45 | 0 – 50 |
| 9 | 970 | 415 | 80.0 | 12 | 15 | 11.1 |
| 10 | 965 | 527 | 83.7 | 16.6 | 23 | 6.7 |
| 11 | 965 | 579 | 86.9 | 19.3 | 28 | 5 |