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Related Concept Videos

Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Imaging neuroinflammation in multiple sclerosis using TSPO-PET.

Laura Airas1, Eero Rissanen1, Juha O Rinne1

  • 1Division of Clinical Neurosciences, Turku University Hospital, Kiinamyllynkatu 4-8, 20521 Turku, Finland ; Turku PET Centre, Turku University Hospital and University of Turku, Turku, Finland.

Clinical and Translational Imaging
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PubMed
Summary

Positron emission tomography (PET) with TSPO radioligands detects diffuse inflammation in multiple sclerosis (MS) undetectable by conventional MRI. This molecular imaging tool aids in tracking disease progression and evaluating new treatments for neuroinflammation.

Keywords:
ImagingMicrogliaMultiple sclerosisProgressive disease

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Area of Science:

  • Neuroimaging
  • Neurology
  • Molecular Imaging

Background:

  • Conventional MRI is standard for multiple sclerosis (MS) diagnostics, detecting focal lesions and atrophy.
  • Diffuse pathology, microglial activation, and neurodegeneration in progressive MS are often missed by conventional MRI.
  • Microglial activation correlates with MS disease severity.

Approach:

  • Positron emission tomography (PET) using 18-kDa translocator protein (TSPO) binding radioligands offers in vivo detection of diffuse pathology.
  • TSPO-PET allows longitudinal monitoring of diffuse inflammation and neurodegeneration.
  • This molecular imaging approach visualizes MS pathology at the cellular level.

Key Points:

  • TSPO-PET shows promise for detecting diffuse inflammation in MS.
  • It enables in vivo monitoring of microglial activation, a marker of neuroinflammation.
  • PET imaging can potentially measure the efficacy of novel disease-modifying drugs in clinical trials.

Conclusions:

  • TSPO-PET is a valuable tool for exploring diffuse inflammation in MS.
  • It has potential applications in future clinical trials for progressive MS.
  • Further standardization of TSPO radioligands and post-processing is needed for multi-center comparisons.