EJNMMI Research

Table 3 Rate constants of H ₂ O parameters for manually drawn gray and white matter ROIs and literature values

From: Cerebral blood flow and glucose metabolism in healthy volunteers measured using a high-resolution PET scanner

	H ₂O parameters
	CBF	V _T	E
Present study
GM	0.43 ± 0.09	0.72 ± 0.06	15
WM	0.13 ± 0.02	0.69 ± 0.10	26
GM/WM	3.3	1.1	0.6
Walker et al. [17]
GM	0.44 ± 0.03
WM	0.15 ± 0.03
GM/WM	2.9

Mean ± SD; data of the present study are obtained by NLR analyses based on BSIFs. CBF, cerebral blood flow (in mL/cm³ per minute); V _T, volume of distribution (unitless); E, FDG extraction fraction (in %); GM, gray matter; WM, white matter.

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