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Brain diffusion tensor imaging in children with tuberous sclerosis
1Erciyes University, Faculty of Medicine, Department of Radiology, Kayseri, Turkey.
Insights
Diffusion tensor imaging (DTI) reveals distinct diffusion characteristics in tubers and white matter lesions in children with tuberous sclerosis (TS). These findings offer insights into cytoarchitectural changes beyond standard MRI.
Area of Science:
- Neuroimaging
- Biophysics
- Pediatric Neurology
Background:
- Tuberous sclerosis (TS) is a genetic disorder causing benign tumors in multiple organs.
- Neuroimaging is crucial for diagnosing and monitoring TS-related brain abnormalities.
- Diffusion Tensor Imaging (DTI) offers advanced insights into tissue microstructure.
Purpose of the Study:
- To assess diffusion characteristics of tubers and white matter lesions in pediatric TS patients.
- To utilize DTI metrics to understand cytoarchitectural changes in TS lesions.
- To compare DTI findings in TS lesions with contralateral normal brain regions.
Main Methods:
- Eighteen pediatric patients with confirmed TS underwent DTI.
- Apparent diffusion coefficient (ADC), fractional anisotropy (FA), radial diffusivity (RD), and axial diffusivity (AD) were measured.
- DTI metrics from 89 tubers and 37 white matter lesions were compared to normal tissue.
Main Results:
- Tubers showed significantly higher ADC, AD, and RD, and lower FA compared to normal tissue (P<0.001).
- White matter lesions exhibited significantly higher RD and lower FA (P<0.05).
- RD increase was significantly greater than AD increase in both tubers and white matter lesions.
Conclusions:
- DTI provides valuable information on cytoarchitectural changes in TS lesions.
- DTI enhances understanding of TS brain pathology beyond conventional MRI.
- Diffusion metrics can help characterize the microstructural environment of TS lesions.
Purpose:
To evaluate diffusion characteristics of tubers and white matter lesions in children with tuberous sclerosis (TS) using diffusion tensor imaging (DTI).
Materials And Methods:
Eighteen children (11 male, 7 female; mean age 9.3years, age range 1-16years) with a definite diagnosis of TS were recruited in this study. Apparent diffusion coefficient (ADC), fractional anisotropy (FA), radial diffusivity (RD), and axial diffusivity (AD) values in 89 tubers and 37 white matter lesions were measured and compared with those of contralateral normal regions.
Results:
ADC, AD, and RD values were significantly higher and FA values were lower in lesions, than the ones measured in contralateral normal regions for tubers (P<0.001). Similarly RD values were significantly higher and FA values were lower in white matter lesions (P<0.05). ADC and AD measures were detected to increase in white matter lesions, however no statistically significant difference was observed. The increase in the mean values of RD was significantly greater than the increase in the AD values for tubers and white matter lesions (P<0.05).
Conclusion:
DTI can provide valuable information about the cytoarchitectural changes in TS lesions beyond morphologic MRI findings alone.
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