Table 2.
Fractional blood volume (vb, in %) as estimated with the two-tissue compartment model
| Full TAC | 50% TAC | Smooth IF | Smooth TAC | Smooth IF and TAC | ||
|---|---|---|---|---|---|---|
| Cortex |
Min. χ2 a |
3.8 ± 4.0 |
4.6 ± 3.4 |
3.7 ± 3.9 |
7.8 ± 6.2 |
6.3 ± 1.9 |
| Model fitb |
7.2 ± 4.0 |
9.7 ± 7.2 |
3.7 ± 3.8 |
15.1 ± 7.1 |
6.3 ± 1.8 |
|
| Hypothalamus | Min. χ2 |
12.7 ± 2.7c |
Not fitted | Not fitted | Not fitted | 11.1 ± 5.0 |
| Model fit | 11.7 ± 1.1c | 11.5 ± 4.1c |
aMin. χ2, vb was varied manually to yield the best goodness of fit (minimal χ2). bModel fit, vb was included as model parameter to be fitted. cSignificant difference to respective value for the cortex but unrealistically high.