The effect of isoflurane on 18 F-FDG uptake in the rat brain: a fully conscious dynamic PET study using motion compensation

In preclinical positron emission tomography (PET) studies an anaesthetic is used to ensure that the animal does not move during the scan. However, anaesthesia may have confounding effects on the drug or tracer kinetics under study, and the nature of these effects is usually not known. We have implem...

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Bibliographic Details
Published inEJNMMI research Vol. 6; no. 1; p. 86
Main Authors Spangler-Bickell, Matthew G, de Laat, Bart, Fulton, Roger, Bormans, Guy, Nuyts, Johan
Format Journal Article
LanguageEnglish
Published Germany 01.12.2016
Subjects
Anaesthesia
FDG
Motion compensation
Preclinical
PET
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Summary:In preclinical positron emission tomography (PET) studies an anaesthetic is used to ensure that the animal does not move during the scan. However, anaesthesia may have confounding effects on the drug or tracer kinetics under study, and the nature of these effects is usually not known. We have implemented a protocol for tracking the rigid motion of the head of a fully conscious rat during a PET scan and performing a motion compensated list-mode reconstruction of the data. Using this technique we have conducted eight rat studies to investigate the effect of isoflurane on the uptake of F-FDG in the brain, by comparing conscious and unconscious scans. Our results indicate that isoflurane significantly decreases the whole brain uptake, as well as decreasing the relative regional FDG uptake in the cortex, diencephalon, and inferior colliculi, while increasing it in the vestibular nuclei. No statistically significant changes in FDG uptake were observed in the cerebellum and striata. The applied event-based motion compensation technique allowed for the investigation of the effect of isoflurane on FDG uptake in the rat brain using fully awake and unrestrained rats, scanned dynamically from the moment of injection. A significant effect of the anaesthesia was observed in various regions of the brain.
ISSN:2191-219X
2191-219X