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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   
  1. 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.