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Related Experiment Videos

Optimizing experimental protocols for quantitative behavioral imaging with 18F-FDG in rodents.

Wynne K Schiffer1, Martine M Mirrione, Stephen L Dewey

  • 1Medical Department, Brookhaven National Laboratory, Upton, New York, New York 11973, USA. wynne@bnl.gov

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|February 3, 2007
PubMed
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Simplify small-animal PET imaging for brain activation studies. Intraperitoneal injection and standardized uptake value (SUV) reduce scan time and improve animal throughput without losing accuracy.

Area of Science:

  • Neuroscience
  • Medical Imaging
  • Radiochemistry

Background:

  • Small-animal PET enables brain imaging in animal models of human neurological conditions.
  • Current procedures can be complex, involving cannulation and anesthesia, potentially impacting behavior and throughput.

Purpose of the Study:

  • To simplify small-animal PET imaging protocols for behavioral studies.
  • To evaluate the use of intraperitoneal injection and standardized uptake value (SUV) for reduced scan duration and improved quantitation.

Main Methods:

  • 18F-FDG PET imaging was performed in 16 animals, with some anesthetized and others awake.
  • Both intravenous and intraperitoneal injection routes were compared.
  • Arterial blood sampling and plasma glucose levels were obtained for quantitative analysis.

Related Experiment Videos

  • A Patlak kinetic model was used to compare SUVs with metabolic rates derived from full input functions.

    • Main Results:

    • A single plasma glucose measurement at 60 minutes post-intraperitoneal injection or 45 minutes post-intravenous injection correlated well with quantitative metabolic rates.
    • This simplified approach using SUV provided a sensitive index of glucose metabolism.

    Conclusions:

    • Intraperitoneal 18F-FDG injection, administered away from the scanner, is feasible for small-animal PET.
    • This method minimizes behavioral impact and allows for shorter scan durations (10-30 min).
    • The simplified protocol enhances animal throughput in neuroimaging studies.