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Apparent relative hypermetabolism of selective brain areas in Huntington disease and importance of reference region for analysis

Authors
Lee, SJ; Lee, WY; Kim, YK; An, YS; Cho, JW; Choi, JY; Kim, BT; Lee, KH
Citation
Clinical nuclear medicine, 37(7):663-668, 2012
Journal Title
Clinical nuclear medicine
ISSN
0363-97621536-0229
Abstract
PURPOSE: We investigated the pattern of reduced and increased metabolism in symptomatic Huntington chorea (HD) patients and assessed the influence of intensity normalization method.



PATIENTS AND METHODS: FDG brain PET was performed in 11 manifest HD patients and 11 age-matched controls. Images underwent statistical parametric mapping analysis after global normalization or with white matter or pons as reference region. Region of interest analysis of FDG uptake ratios was also performed using total region or white matter as reference. Correlation between regional uptake ratios to that of the caudate was evaluated by linear regression analysis.



RESULTS: Although statistical parametric mapping analysis identified striatal hypometabolism and thalamic hypermetabolism in HD patients with all methods, substantially different FDG uptake patterns were shown depending on the method of intensity normalization. Global normalization displayed large areas of relative normalized hypermetabolism across the cerebral cortex and cerebellum. With white matter as reference, relative normalized hypermetabolism was observed in the thalamus and a much more limited area of the cortex. With pons as reference, relative normalized hypermetabolism was largely confined to the thalamus and a small area of the cerebellum.



CONCLUSION: These results demonstrate apparent relative normalized hypermetabolism in selective brain regions in manifest HD patients. Furthermore, the choice of reference region for intensity normalization is critical for accurate monitoring of this metabolic change with FDG PET.
MeSH terms
Brain/*metabolism/radionuclide imaging*Brain MappingFemaleFluorodeoxyglucose F18/diagnostic useHumansHuntington Disease/*metabolism/radionuclide imagingMaleMiddle AgedPositron-Emission TomographyReference Standards
DOI
10.1097/RLU.0b013e3182478bf2
PMID
22691507
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Nuclear Medicine & Molecular Imaging
AJOU Authors
이, 수진안, 영실
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