Table 3.

Kinetic parameters estimates from gray and white matter

	2TCM (short window)								Patlak (validation window)		Relative error (%) in ${\mathit{K}}_i$ (short window against validation window)
	${\mathit{K}}_1$(ml/g/min)		${\mathit{k}}_2$(1/min)		${\mathit{k}}_3$(1/min)		${\mathit{K}}_i$(ml/g/min)		${\mathit{K}}_i$(ml/g/min)
	GM	WM	GM	WM	GM	WM	GM	WM	GM	WM	GM	WM
P1	0.07	0.04	0.10	0.06	0.05	0.03	0.025	0.014	0.024	0.015	3.1	− 4.4
P2	0.06	0.03	0.08	0.05	0.03	0.02	0.015	0.007	0.016	0.010	− 1.1	− 26.0
P3	0.09	0.05	0.13	0.07	0.05	0.01	0.022	0.006	0.021	0.011	6.4	− 44.3
P4	0.07	0.04	0.10	0.06	0.05	0.03	0.025	0.014	0.024	0.015	3.1	− 4.4
P5	0.06	0.05	0.12	0.07	0.02	0.04	0.010	0.016	0.011	0.018	− 7.2	− 11.0
P6	0.10	0.06	0.15	0.10	0.04	0.02	0.021	0.012	0.020	0.014	7.0	− 13.6
Mean ± SD	0.08  ± 0.02	0.05  ± 0.01	0.11  ± 0.03	0.07  ± 0.02	0.04  ± 0.01	0.03  ± 0.01	0.020  ± 0.006	0.012  ± 0.004	0.019  ± 0.005	0.014  ± 0.003	1.9  ± 5.3	− 17.3  ± 15.4