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Published on: June 23, 2023
Structural Imaging in Atypical Parkinsonism
Beatrice Heim1, Florian Krismer1, Klaus Seppi2
1Department of Neurology, Medical University Innsbruck, Innsbruck, Austria.
Abstract:
Qualitative and quantitative structural magnetic resonance imaging offer objective measures of the underlying neurodegeneration in atypical parkinsonism. Regional changes in tissue volume, signal changes and increased deposition of iron as assessed with different structural MRI techniques are surrogate markers of underlying neurodegeneration and may reflect cell loss, microglial proliferation and astroglial activation. Structural MRI has been explored as a tool to enhance diagnostic accuracy in differentiating atypical parkinsonian disorders (APDs). Moreover, the longitudinal assessment of serial structural MRI-derived parameters offers the opportunity for robust inferences regarding the progression of APDs. This review summarizes recent research findings as (1) a diagnostic tool for APDs as well as (2) as a tool to assess longitudinal changes of serial MRI-derived parameters in the different APDs.
Insights
Structural MRI provides objective markers for neurodegeneration in atypical parkinsonism. This review explores its use in diagnosing atypical parkinsonian disorders and tracking disease progression over time.
Area of Science:
- Neuroimaging
- Neurology
- Radiology
Background:
- Atypical parkinsonian disorders (APDs) involve neurodegeneration.
- Accurate diagnosis and monitoring of APDs are clinically significant.
- Structural MRI offers objective biomarkers for neurodegenerative processes.
Purpose of the Study:
- To review structural MRI as a diagnostic tool for APDs.
- To assess structural MRI's utility in tracking longitudinal changes in APDs.
Main Methods:
- Review of qualitative and quantitative structural MRI studies in APDs.
- Analysis of MRI-derived parameters reflecting neurodegeneration (e.g., volume, signal, iron deposition).
- Evaluation of MRI for differential diagnosis and progression assessment.
Main Results:
- Structural MRI techniques provide objective measures of neurodegeneration in APDs.
- Regional changes in tissue volume, signal, and iron deposition serve as surrogate markers.
- Serial MRI assessments can infer disease progression.
Conclusions:
- Structural MRI enhances diagnostic accuracy in differentiating APDs.
- Longitudinal MRI-derived parameters offer robust insights into APD progression.
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