Table 3.

Between-subjects variation in 18F-DOPA k_i^cer values in extrastriatal brain regions. 18F-DOPA k_i^cer values acquired during test and retest scan are presented as mean±S.D. min⁻¹. Spread or variation between subjects is expressed as percentage coefficient of variation (%CV) = SD/mean ×100.

	Test		Retest

	k_i^cer (mean±SD)	CV (%)	k_i^cer (mean±SD)	CV (%)
White matter	0.00264 ± 0.00023	8.9%	0.00239 ± 0.00024*	9.9%

Pallidum	0.00772 ± 0.00078	10.1%	0.00713 ± 0.00072*	10.1%
Left	0.00549 ± 0.00093	16.9%	0.00494 ± 0.00049	10.0%
Right	0.01010 ± 0.00078	8.3%	0.00929 ± 0.00112	12.1%

Substantia nigra	0.00744 ± 0.00160	19.1%	0.00734 ± 0.00100	13.7%
Left	0.00832 ± 0.00144	17.4%	0.00805 ± 0.00135	16.8%
Right	0.00664 ± 0.00160	24.1%	0.00675 ± 0.00127	18.8%

Thalamus	0.00258 ± 0.00024	9.4%	0.00249 ± 0.00033	13.4%
Left	0.00248 ± 0.00031	12.7%	0.00241 ± 0.00042	17.4%
Right	0.00268 ± 0.00029	10.9%	0.00256 ± 0.00035	13.6%

Hippocampus	0.00394 ± 0.00035	8.8%	0.00375 ± 0.00047	12.4%
Left	0.00396 ± 0.00039	9.8%	0.00374 ± 0.00034	9.0%
Right	0.00388 ± 0.00041	10.5%	0.00399 ± 0.00027	6.8%

Amygdala	0.00607 ± 0.00042	6.9%	0.00575 ± 0.00042	7.2%
Left	0.00602 ± 0.00046	7.7%	0.00561 ± 0.00047	8.5%
Right	0.00610 ± 0.00056	9.1%	0.00590 ± 0.00038	6.5%

Anterior cingulate	0.00316 ± 0.00026	8.4%	0.00290 ± 0.00035*	12.0%
Left	0.00318 ± 0.00031	9.8%	0.00299 ± 0.00032	10.5%
Right	0.00316 ± 0.00026	8.2%	0.00281 ± 0.00041*	14.7%

Posterior cingulate	0.00183 ± 0.00028	15.3%	0.00153 ± 0.00025*	16.3%
Left	0.00168 ± 0.00027	16.0%	0.00140 ± 0.00028*	20.2%
Right	0.00197 ± 0.00033	17.0%	0.00163 ± 0.00027*	16.4%

Medial frontal gyrus	0.00198 ± 0.00040	20.1%	0.00193 ± 0.00028	14.5%
Left	0.00207 ± 0.00036	17.9%	0.00199 ± 0.00033	16.5%
Right	0.00207 ± 0.0024	14.7%	0.00187 ± 0.00025*	13.2%

Anterior orbital gyrus	0.00225 ± 0.00035	15.7%	0.00224 ± 0.00040	17.8%
Left	0.00226 ± 0.00040	17.9%	0.00231 ± 0.00047	20.4%
Right	0.00224 ± 0.00033	14.7%	0.00217 ± 0.00035	16.2%