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Related Experiment Video

Updated: Dec 25, 2025

Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
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Mean apparent propagator-MRI: A new diffusion model which improves temporal lobe epilepsy lateralization.

Keran Ma1, Xiaonan Zhang1, Huiting Zhang2

  • 1Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, China.

European Journal of Radiology
|March 21, 2020
PubMed
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Mean Apparent Propagator MRI (MAP-MRI) shows promise for non-invasively lateralizing temporal lobe epilepsy (TLE) foci. Specific MAP-MRI measures strongly differentiate affected hippocampi and correlate with cognitive function.

Area of Science:

  • Neuroimaging
  • Epilepsy Research
  • Radiology

Background:

  • Temporal lobe epilepsy (TLE) is a common neurological disorder often requiring accurate lateralization of the epileptogenic focus for effective treatment.
  • Current methods for lateralization can be invasive or lack sufficient precision.
  • Advanced MRI techniques offer potential for non-invasive assessment of brain structures like the hippocampus.

Purpose of the Study:

  • To compare Mean Apparent Propagator MRI (MAP-MRI) and Diffusion Tensor Imaging (DTI) parameters against traditional MRI measures for non-invasive lateralization of TLE.
  • To investigate the correlation between DTI and MAP-MRI metrics and cognitive function in TLE patients.

Main Methods:

  • Retrospective analysis of unilateral TLE patients and matched controls.
Keywords:
Diffusion propagatorNon-gaussianTemporal lobe epilepsy

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  • Acquisition of T1-weighted MPRAGE, FLAIR, DTI, and MAP-MRI data from bilateral hippocampi.
  • Calculation of sensitivity, specificity, lateralization ratios, effect sizes, and Pearson correlations.

    • Main Results:

    • MAP-MRI parameter 'return to the plane probability' (RTPP) demonstrated the strongest effect size for lateralizing the epileptogenic hippocampus (86.36% ratio).
    • Diffusion metrics including Mean Diffusivity (MD), Radial Diffusivity (RD), and Mean Square Displacement (MSD) negatively correlated with delayed recall.
    • Other DTI/MAP-MRI parameters like RTAP, RTOP, and Fractional Anisotropy (FA) showed positive correlations with cognitive measures.

    Conclusions:

    • MAP-MRI parameters are effective radiologic biomarkers for non-invasive lateralization of epileptogenic foci in TLE.
    • These advanced MRI techniques provide valuable insights into the relationship between microstructural brain changes and cognitive deficits in TLE.