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Related Experiment Video

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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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Differentiating high-grade glioma recurrence from pseudoprogression: Comparing diffusion kurtosis imaging and

Xiao-Feng Wu1, Xiao Liang2, Xiao-Chun Wang1

  • 1Department of Radiology, First Clinical Medical College, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China; College of Medical Imaging, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China.

European Journal of Radiology
|December 20, 2020
PubMed
Summary

Diffusion kurtosis imaging (DKI) better distinguishes high-grade glioma recurrence from pseudoprogression (PsP) than diffusion tensor imaging (DTI). Relative mean kurtosis (rMK) is the most effective predictor for differentiating these conditions.

Keywords:
Diffusion kurtosis imagingHigh-grade gliomaPseudoprogressionRecurrence

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Area of Science:

  • Neuroimaging
  • Oncology
  • Radiology

Background:

  • Differentiating high-grade glioma recurrence from pseudoprogression (PsP) is critical for treatment planning.
  • Conventional MRI can be limited in distinguishing these conditions.
  • Advanced diffusion MRI techniques offer potential for improved diagnostic accuracy.

Purpose of the Study:

  • To compare the diagnostic performance of DKI and DTI in differentiating high-grade glioma recurrence from PsP.
  • To evaluate specific DKI and DTI parameters for their ability to distinguish between recurrence and PsP.

Main Methods:

  • Forty patients with high-grade gliomas and new enhancing lesions underwent routine MRI, DKI, and DTI.
  • DKI parameters (mean kurtosis [MK], axial kurtosis [Ka], radial kurtosis [Kr]) and DTI parameters (mean diffusivity [MD], fractional anisotropy [FA]) were measured in enhancing lesions and perilesional edema.
  • Statistical analysis included Mann-Whitney U test, ROC curve analysis, and Z-scores for parameter comparison.

Main Results:

  • Relative MK (rMK) was significantly higher in high-grade glioma recurrence compared to PsP in both enhancing lesions and perilesional edema.
  • Relative MD (rMD) was significantly lower in high-grade glioma recurrence compared to PsP in both regions.
  • DKI, specifically rMK, demonstrated superior diagnostic efficacy (AUC 0.914) compared to DTI (rMD AUC 0.760) in differentiating recurrence from PsP.

Conclusions:

  • DKI exhibits superior performance over DTI in differentiating high-grade glioma recurrence from PsP.
  • Relative mean kurtosis (rMK) is identified as the most effective independent predictor for this differentiation.
  • These findings suggest DKI can improve diagnostic accuracy in post-treatment glioma management.