X-linked adrenoleukodystrophy: correlation between Loes score and diffusion tensor imaging parameters

Area of Science:

• Neuroimaging
• Neurology
• Biomedical Engineering

Background:

• X-linked adrenoleukodystrophy (X-ALD) is a progressive neurological disorder.
• Early detection of structural alterations is crucial for managing X-ALD.
• Diffusion tensor imaging (DTI) offers insights into white matter integrity.

Purpose of the Study:

• To evaluate the correlation between DTI parameters and the Loes score in X-ALD.
• To determine if DTI parameters can indicate early structural alterations.
• To assess the utility of DTI in predicting disease progression.

Main Methods:

• DTI measurements were acquired from 14 X-ALD patients (30 studies).
• DTI data were correlated with established Loes scores.
• A control group of 28 male patients was used for age-matched comparisons.
• Inter- and intraobserver statistical analyses were performed.

Main Results:

• Strong Pearson correlation coefficients (r) were observed between DTI parameters (fractional anisotropy, mean, radial, and axial diffusivities) and Loes scores (ranging from -0.86 to 0.89, p < 0.01).
• Mean and radial diffusivities showed potential for predicting disease progression at early stages.
• DTI parameters demonstrated significant correlation with disease severity.

Conclusions:

• DTI parameter measurements can serve as an adjunct to the Loes score for X-ALD monitoring.
• DTI can help identify potential Loes score progression, informing therapeutic decisions.
• DTI provides valuable quantitative data for assessing white matter changes in X-ALD.