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Lesion Explorer: A Video-guided, Standardized Protocol for Accurate and Reliable MRI-derived Volumetrics in Alzheimer's Disease and Normal Elderly
Published on: April 14, 2014
Quantitative MRI assessment of leukoencephalopathy
Wilburn E Reddick1, John O Glass, James W Langston
1Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-2794, USA. gene.reddick@stjude.org
Magnetic Resonance in Medicine
|April 30, 2002
Summary
This study introduces an automated MRI method to accurately measure leukoencephalopathy, overcoming challenges in distinguishing it from normal brain tissue. This technique aids in understanding and managing therapy-induced neurotoxicity in patients.
Area of Science:
- Neuroimaging
- Radiology
- Medical Physics
Background:
- Quantitative magnetic resonance imaging (MRI) for leukoencephalopathy is challenging due to overlapping tissue properties.
- Accurate assessment is crucial for managing therapy-induced neurotoxicity.
Purpose of the Study:
- To develop and validate an automated MRI procedure for quantifying leukoencephalopathy.
- To assess the clinical utility of this method in patients undergoing treatment for acute lymphoblastic leukemia (ALL).
Main Methods:
- An automated procedure was developed for longitudinal measurement of tissue volume and relaxation times.
- Reproducibility was tested in healthy volunteers (n=5, 25 examinations).
- Automated results were compared against manual segmentation by two radiologists using Kappa analysis.
Main Results:
- The automated method demonstrated high reproducibility with coefficients of variation <2% for gray and white matter.
- Radiologist agreement was concordant (kappa = 0.70).
- Automated procedure showed good agreement with radiologists (kappa = 0.57 and 0.55).
Conclusions:
- The automated MRI procedure reliably quantifies leukoencephalopathy.
- This method shows clinical potential for monitoring therapy-induced neurotoxicity in ALL patients.
- Quantitative MRI measures can inform interventions to mitigate neurotoxicity.
