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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Diffusion tensor imaging and tractography of Rasmussen encephalitis.
Keith A Cauley1, Heather N Burbank, Christopher G Filippi
1Department of Radiology, Fletcher Allen Hospital, The University of Vermont, 111 Colchester Ave., Burlington, VT 05401, USA. keithcauley@hotmail.com
Pediatric Radiology
|April 25, 2009
Summary
Rasmussen encephalitis, a rare brain condition, was diagnosed in a child using advanced MRI techniques. Diffusion tensor imaging aids in diagnosing and monitoring this neurological disorder.
Area of Science:
- Neurology
- Neuroimaging
- Pediatric Neurology
Background:
- Rasmussen encephalitis is a rare, chronic inflammatory neurological disease affecting one cerebral hemisphere.
- It typically presents in childhood with intractable seizures and progressive neurological deficits.
- Diagnosis can be challenging, often relying on clinical presentation and neuroimaging findings.
Observation:
- A 5-year-old girl presented with severe seizures and EEG abnormalities.
- Brain MRI revealed significant volume loss in the left cerebral hemisphere.
- Standard laboratory tests were unremarkable.
Findings:
- Diffusion tensor imaging (DTI) showed increased apparent diffusion coefficient (ADC) values and reduced fractional anisotropy (FA) in the affected left hemisphere.
- Tractography demonstrated fewer white matter tracts in the affected hemisphere compared to controls.
- These DTI findings correlate with the observed hemispheric atrophy and dysfunction.
Implications:
- Diffusion tensor imaging serves as a valuable tool for diagnosing Rasmussen encephalitis.
- DTI can help monitor disease progression and treatment response.
- Advanced neuroimaging techniques like DTI improve understanding and management of rare neurological conditions.
