TABLE 1

Summary of Test and Retest $\text{[math]}$ Estimation

			k′₂ (min⁻¹)^*
Subject no.	Age (y)	Sex	Test	Retest	% difference
1	41	M	0.049	0.052	6.6
2	41	F	0.067	0.073	9.5
3	21	M	0.066	0.066	−0.1
4	20	M	0.055	0.058	5.4
5	22	F	0.082	0.076	−7.1
6	24	F	0.079	0.077	−3.0
7	23	F	0.079	0.079	−0.6
8	19	F	0.051	0.056	9.7
Mean ± SD	26 ± 9		0.066 ± 0.013	0.067 ± 0.011	2.5 ± 6.2

↵* Mean $\text{[math]}$ value estimated with MRTM model on thalamus, striatum, and raphe time–activity curve with cerebellum as a reference region.