Related Experiment Video
Updated: Nov 9, 2025
09:33
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
28.8K
Diffusion weighted imaging in high-grade gliomas: A histogram-based analysis of apparent diffusion coefficient
Georg Gihr1, Diana Horvath-Rizea1, Elena Hekeler2
1Clinic for Neuroradiology, Katharinenhospital Stuttgart, Stuttgart, Germany.
Plos One
|April 15, 2021
Summary
Apparent diffusion coefficient (ADC) histogram analysis can differentiate glioblastoma from anaplastic astrocytoma, reflecting tumor heterogeneity and proliferation. This imaging biomarker shows promise for distinguishing these high-grade gliomas.
Area of Science:
- Neuro-oncology
- Radiology
- Medical Imaging Analysis
Background:
- Glioblastoma (GBM) and anaplastic astrocytoma are distinct high-grade gliomas (HGGs) with similar MRI appearances.
- Distinguishing these HGGs is crucial for prognosis and treatment planning.
- Apparent diffusion coefficient (ADC) histogram analysis is an emerging technique for characterizing brain tumors.
Purpose of the Study:
- To investigate if ADC histogram parameters differ between GBM and anaplastic astrocytoma.
- To determine if ADC histogram parameters correlate with Ki-67 proliferation index.
- To assess the association between ADC histogram parameters and MGMT promotor methylation status.
Main Methods:
- Retrospective analysis of pre-surgical ADC volumes from 56 HGG patients.
- Histogram profiling of ADC maps to extract quantitative parameters.
- Comparative and correlative statistical analysis with neuropathological data (WHO grade, Ki-67, MGMT methylation).
Main Results:
- GBM (Grade IV) exhibited greater heterogeneity than anaplastic astrocytoma (Grade III).
- Significant differences in ADCmin, ADCp10, ADCmax, ADC standard deviation, and Skewness were observed between GBM and anaplastic astrocytoma.
- ADC histogram parameters correlated significantly with Ki-67 expression, indicating associations with proliferative activity.
Conclusions:
- ADC histogram profiling demonstrates significant differences between GBM and anaplastic astrocytoma.
- These parameters are associated with tumor proliferative activity (Ki-67).
- ADC histogram analysis is a promising biomarker for differentiating HGGs, warranting further prospective validation.
