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Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...

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Updated: Jun 14, 2026

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
09:33

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

29.2K

Diffusion tensor imaging in Chediak Higashi Disease.

Connor J Lewis1,2,3, Selby I Chipman1,2,3, Cynthia J Tifft1,2,3

  • 1National Institutes of Health Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH, Bethesda, MD, USA.

Medrxiv : the Preprint Server for Health Sciences
|September 19, 2025
PubMed
Summary
This summary is machine-generated.

Diffusion Tensor Imaging (DTI) reveals progressive neurodegeneration in Chediak-Higashi Disease (CHD). DTI metrics show significant white matter changes, suggesting its potential as a neuroimaging biomarker for CHD progression.

Keywords:
Chediak-Higashi DiseaseCorrelational Fiber TractographyDiffusion Tensor ImagingImaging BiomarkersLysosomal DiseaseMagnetic Resonance Imaging

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Diffusion Tensor Magnetic Resonance Imaging in Chronic Spinal Cord Compression
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Area of Science:

  • Neuroimaging
  • Neurology
  • Biomarkers

Background:

  • Chediak-Higashi Disease (CHD) is a rare genetic disorder with significant neurological implications.
  • Understanding the natural history of neurodegeneration in CHD is crucial for patient management.
  • Diffusion Tensor Imaging (DTI) offers insights into white matter integrity.

Purpose of the Study:

  • To characterize the natural history of DTI metrics in pediatric patients with CHD.
  • To compare DTI findings in CHD participants with neurotypical controls (NC).
  • To evaluate DTI as a potential neuroimaging biomarker for CHD.

Main Methods:

  • Acquired DTI scans from 15 CHD participants and 100 NC.
  • Analyzed DTI metrics: fractional anisotropy (FA), mean, axial, and radial diffusivity (MD, AD, RD).
  • Utilized correlational tractography to identify group differences in white matter pathways.

Main Results:

  • Pediatric CHD participants showed similar baseline DTI metrics to NC.
  • Progressive increases in MD, AD, and RD were observed in CHD participants compared to NC.
  • Correlational tractography revealed decreased FA and increased MD, AD, and RD in specific fiber tracts in CHD.

Conclusions:

  • Progressive DTI metric deviations in CHD indicate ongoing neurodegeneration.
  • Cerebellar white matter aberrations correlate with clinical symptoms like cerebellar dysfunction and cognitive decline.
  • DTI shows promise as a neuroimaging marker for tracking CHD progression and neurodegeneration.