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Related Experiment Videos

[Cerebral blood flow pattern in progressive supranuclear palsy].

K Okada1, S Kobayashi, K Yamashita

  • 1Third Division of Internal Medicine, Shimane Medical University.

Rinsho Shinkeigaku = Clinical Neurology
|June 1, 1991
PubMed
Summary

Diagnosing progressive supranuclear palsy (PSP) is challenging due to its similarity to parkinsonian syndrome. Cerebral blood flow (CBF) studies using SPECT can aid in PSP diagnosis by revealing characteristic frontal hypoperfusion.

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Area of Science:

  • Neurology
  • Neuroimaging
  • Nuclear Medicine

Background:

  • Progressive supranuclear palsy (PSP) presents as subcortical dementia, often mimicking parkinsonian syndrome, complicating diagnosis.
  • Previous Positron Emission Tomography (PET) studies have indicated frontal hypo-metabolism in PSP patients.

Purpose of the Study:

  • To investigate the cerebral blood flow (CBF) pattern in PSP patients using single-photon-emission-computed tomography (SPECT).
  • To assess the utility of SPECT-based CBF studies in confirming PSP diagnosis and differentiating it from other neurological disorders.

Main Methods:

  • Utilized 123I-isopropyl-iodoamphetamine (IMP) SPECT to measure CBF in 5 PSP patients and compared findings with normal controls, Parkinson's disease (PD), olive-pontocerebellar atrophy (OPCA), and dementia of Alzheimer's type (DAT) patients.

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  • Employed semi-quantitative methods with Regions of Interest (ROIs) at cerebellar, basal ganglion, and lateral ventricle levels, normalizing counts to the occipital ROI.

    • Main Results:

    • All PSP patients exhibited marked reductions in relative blood flow in frontal (66.6%) and fronto-temporal (65.5%) regions compared to the occipital lobe.
    • These reductions were statistically significant when compared to other degenerative neurological diseases.
    • Frontal hypoperfusion demonstrated a progression correlating with the advancing clinical stage of PSP.

    Conclusions:

    • CBF studies using SPECT are a valuable tool for confirming the diagnosis of PSP.
    • The findings align with previous PET studies showing frontal hypo-metabolism in PSP.
    • Further research is needed to elucidate the role of basal ganglia damage in the observed frontal hypometabolic pattern.