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Neuro-Behçet's disease: analysis of apparent diffusion coefficients
1Department of Radiology, Graduate School of Medicine, Tokyo University, 7-3-1 Hongo, Bunkyo-Ku 113-8655, Tokyo, Japan. akrk-tky@umin.ac.jp
Neuroradiology
|July 25, 2003
Summary
Diffusion MRI reveals increased diffusivity in neuro-Behçet's disease (NBD) brain lesions. This finding in both active and chronic NBD lesions may help differentiate them from ischemic infarcts.
Area of Science:
- Neuroimaging
- Neurology
- Diffusion MRI
Background:
- Neuro-Behçet's disease (NBD) is a neurological condition with poorly understood brain lesion characteristics.
- Diffusion-weighted imaging (DWI) is a valuable MRI technique for characterizing brain tissue properties.
Purpose of the Study:
- To investigate the diffusion properties of brain lesions in patients with NBD using DWI.
- To compare the diffusion characteristics of active and chronic NBD lesions with normal brain tissue.
Main Methods:
- Diffusion-weighted MRI (DWI) was performed on six patients with NBD, examining 19 lesions (13 active, 6 chronic).
- Apparent diffusion coefficients (ADC) were calculated for NBD lesions and normalized to contralateral normal brain tissue, yielding relative ADC (rADC).
Main Results:
- Both active (rADC=1.29+/-0.33) and chronic (rADC=1.44+/-0.47) NBD lesions showed significantly higher rADC values compared to normal brain regions.
- The observed increased diffusivity in NBD lesions differs from the pattern seen in ischemic infarcts.
Conclusions:
- Diffusion MRI reveals increased diffusivity in both active and chronic brain lesions associated with NBD.
- ADC analysis holds potential as a tool to distinguish NBD lesions from ischemic infarcts in the brain.