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Updated: Jun 13, 2026
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
[Diffusion and perfusion magnetic resonance imaging in evaluation of primary glial brain tumors]
T L Stosić-Opinćal1, M V Macvanski, S S Gavrilović
1Centar za radiologiju i magnetnu rezonanciju, KCS, Beograd.
Introduction:
Diffusion (DWI) and perfusion (PWI) imaging can give important data about physiological characteristics of tissue, which complete morphologic findings from conventional MRI. The aim of this study is to estimate the value of these MRI technics in evaluation of primary glial brain tumors.
Materials And Methods:
The significance of DWI and PWI in differentiation of histologically proven low- and high-grade gliomas was estimated in 48 patient with diagnosed brain gliomas. ADC and rCBV values were compared by aplication of Mann-Whitney test, and logistic regression analysis was used to determine which of these two parameters contributed the most in increasing the diagnostic accuracy, ia. its sensitivity, specificity and predictive velues. ROC curves were constructed to determine threshold values for differentiation of low- from high-grade lesions.
Results:
Statistical significance were showed between mean values of rCBV for low-grade (0.82) and high-grade (5.32) gliomas, which was not found for values of ADC parameters. Threshold rCBV value of 1.23 was determinated for discrimination between low- and high-grade gliomas with a sensitivity of 83.2% and a specificity of 77.5%.
Conclusion:
Conventional MRI combined with PWI increases the accuracy in determination of glioma grade.
Insights
Perfusion imaging (PWI) significantly improves the accuracy of differentiating low-grade from high-grade gliomas, outperforming diffusion imaging (DWI) in this diagnostic task.
Area of Science:
- Neuroimaging
- Oncology
- Radiology
Context:
- Conventional MRI provides morphological data, but lacks physiological insights.
- Diffusion-weighted imaging (DWI) and perfusion-weighted imaging (PWI) offer complementary physiological information.
- Primary glial brain tumors require accurate grading for effective treatment planning.
Purpose:
- To evaluate the diagnostic value of DWI and PWI in distinguishing low-grade from high-grade gliomas.
- To compare the efficacy of apparent diffusion coefficient (ADC) and relative cerebral blood volume (rCBV) values.
- To determine the optimal parameters for increasing diagnostic accuracy, sensitivity, and specificity.
Summary:
- A study of 48 glioma patients compared ADC and rCBV values.
- Relative cerebral blood volume (rCBV) showed statistically significant differences between low-grade (0.82) and high-grade (5.32) gliomas.
- A threshold rCBV of 1.23 achieved 83.2% sensitivity and 77.5% specificity in differentiating glioma grades.
Impact:
- Perfusion-weighted imaging (PWI) enhances diagnostic accuracy when combined with conventional MRI for glioma grading.
- This technique aids in more precise tumor characterization and treatment stratification.
- Findings support the integration of PWI into routine brain tumor imaging protocols.
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