@article{1262576,
  abstract     = {{The aim of this study was to investigate whether normoglycemic glucose concentrations interfere with cerebral F-18 FDG uptake.
The analysis was based on 2 sets of paired PET scans in 94 patients who were in complete metabolic remission after the successful completion of treatment for lymphoma. For these 188 PET scans, 2 subgroups were defined according to the plasma glucose level at the time of scanning. Group 1 contained the PET images that were associated with the lower of both normoglycemic plasma glucose levels, whereas group 2 contained the PET images that were associated with the higher of both plasma glucose levels. SUVs (standard uptake values) in the cerebellum between both groups were compared using paired sample T test. Subsequently, SUVs were normalized to a standard glucose concentration and normalized SUVs were again compared. Further, we calculated the coefficient of variation of SUVs in group 1 and 2 both before and after the normalization step.
Mean plasma glucose level was 86 mg/dL (SD of 9 mg/dL) in group 1 and 97 mg/dL (SD of 10 mg/dL) in group 2. Mean SUV was 3.8 (SD of 1.1) for group 1 and 3.5 (SD of 1.1) for group 2. Mean SUV in group 1 was slightly but statistically significantly higher than the mean SUV in group 2 (p < 0.01). Mean normalized SUV was 3.6 (SD of 1.1) in group 1 and 3.7 (SD of 1.3) in group 2. A paired comparison between normalized SUVs in both groups indicated that there was no statistically significant difference (p < 0.31). The coefficient of variation for the SUVs in group 1 and 2 before normalization was 29 and 30%, respectively. The coefficient of variation for the normalized SUVs in group 1 and 2 was 30 and 34%, respectively.
Our results indicated that plasma glucose levels that are within the normoglycemic range have a small but systematic effect on F-18 FDG uptake in the brain (following an inverse relationship). Normalizing plasma glucose levels to a standard glucose concentration successfully reduced the intra-subject variability of SUV measures. Inter-subject variability, however, remained high suggesting that other factors have an influence as well.}},
  author       = {{Claeys, Jonas and Mertens, Koen and D'Asseler, Yves and Goethals, Ingeborg}},
  issn         = {{0914-7187}},
  journal      = {{ANNALS OF NUCLEAR MEDICINE}},
  keywords     = {{STANDARDIZED UPTAKE VALUES,SUV,CEREBRAL-BLOOD-FLOW,METABOLIC MEASUREMENTS,PET,HYPERGLYCEMIA,VARIABILITY,Brain metabolism,Normoglycemia,QUANTIFICATION,INSULIN,ANXIETY,TUMORS}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{501--505}},
  title        = {{Normoglycemic plasma glucose levels affect F-18 FDG uptake in the brain}},
  url          = {{http://dx.doi.org/10.1007/s12149-010-0359-9}},
  volume       = {{24}},
  year         = {{2010}},
}

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