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Table 3 Relative rCBF grey matter measurements from PET and perfusion CT scanning normalized to white matter

From: Brain perfusion CT compared with15O-H2O-PET in healthy subjects

   PET COV CT COV ΔCBF  
Side ROI Mean ± SD % Mean ± SD % Mean ± SD p Value
Right Caudate nucleus 2.77 ± 0.26 9.4 3.32 ± 0.55 16.6 0.56 ± 0.40 < 0.05
  Putamen 2.90 ± 0.30 10.4 3.39 ± 0.62 18.3 0.44 ± 0.65 NS
  Frontal cortex 2.81 ± 0.30 10.5 3.47 ± 0.60 17.2 0.66 ± 0.52 < 0.05
  Parietal cortex 2.56 ± 0.35 13.6 3.37 ± 0.67 19.8 0.81 ± 0.67 < 0.05
  Occipital cortex 2.58 ± 0.34 13.3 3.17 ± 0.64 20.2 0.59 ± 0.72 NS
Left Caudate nucleus 2.84 ± 0.33 11.6 3.24 ± 0.62 19 0.40 ± 0.45 NS
  Putamen 2.96 ± 0.28 9.4 3.36 ± 0.66 19.7 0.37 ± 0.66 NS
  Frontal cortex 2.94 ± 0.31 10.4 3.41 ± 0.56 16.3 0.48 ± 0.52 NS
  Parietal cortex 2.67 ± 0.34 12.7 3.43 ± 0.64 18.5 0.76 ± 0.70 < 0.05
  Occipital cortex 2.65 ± 0.40 15 3.12 ± 0.77 24.8 0.47 ± 0.69 NS
  Volume weighted grey matter 2.78 ± 0.25 9.1 3.34 ± 0.48 14.3 0.56 ± 0.47 < 0.05
  1. CBF, cerebral blood flow; PET, positron-emission tomography; CT, computed tomography; ROI, region of interest; SD, standard deviation; COV, coefficient of variance; NS, non-significant. N = 12. The p values are Bonferroni-corrected.