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Related Experiment Videos

Neuroimaging in infantile autism

T Schifter1, J M Hoffman, H P Hatten

  • 1Department of Radiology, Duke University Medical Center, Durham, NC 27710.

Journal of Child Neurology
|April 1, 1994
PubMed
Summary

Positron emission tomography (PET) with [18F]fluorodeoxyglucose (FDG) revealed metabolic brain abnormalities in children with autism. These metabolic findings aided in detecting subtle structural anomalies not visible on initial MRI scans.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Pediatrics

Background:

  • Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
  • Neuroimaging plays a crucial role in understanding the underlying pathophysiology of ASD.
  • Previous studies have explored both structural and metabolic brain alterations in autism.

Purpose of the Study:

  • To investigate the utility of [18F]fluorodeoxyglucose (FDG) Positron Emission Tomography (PET) in conjunction with anatomical imaging (CT/MRI) for characterizing brain abnormalities in children with infantile autism.
  • To determine if metabolic findings from FDG-PET can reveal subtle anatomical abnormalities missed by conventional imaging.

Main Methods:

  • Utilized [18F]fluorodeoxyglucose (FDG) Positron Emission Tomography (PET) for metabolic assessment.

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  • Correlated FDG-PET findings with anatomical imaging, including Computed Tomography (CT) and Magnetic Resonance Imaging (MRI).
  • Examined 13 children diagnosed with infantile autism, analyzing 195 brain areas for metabolic abnormalities.

    • Main Results:

    • Four out of 13 patients showed both abnormal FDG-PET and abnormal MRI findings.
    • Seven out of 13 patients had normal findings on both FDG-PET and CT/MRI.
    • FDG-PET identified hypometabolic abnormalities in 16 of 195 brain areas. Three of five abnormal structural imaging studies revealed neuronal migrational anomalies (focal pachygyria).
    • In two cases, anatomical abnormalities were only identified after reviewing the FDG-PET results.

    Conclusions:

    • Both anatomical and metabolic brain abnormalities can be present in children with autistic behavior.
    • FDG-PET imaging can detect metabolic dysfunction, potentially highlighting subtle anatomical abnormalities that may not be apparent on initial MRI scans.
    • Combined metabolic and anatomical imaging offers a more comprehensive approach to understanding brain alterations in infantile autism.