Diagnostic value of 3D fluid attenuated inversion recovery sequence in multiple sclerosis

Area of Science:

• Radiology
• Neuroimaging
• Neurology

Background:

• Magnetic resonance imaging (MRI) is crucial for diagnosing multiple sclerosis (MS).
• Current MRI protocols often include axial dual-echo, unenhanced, and post-contrast T1-weighted sequences.
• Dual-echo sequences have enhanced detection of cortical and infratentorial MS lesions.

Purpose of the Study:

• To compare the diagnostic performance of novel 3D FLAIR MRI sequences against conventional T2 and PD sequences for MS lesion detection.
• To assess the impact of 3D FLAIR sequences on lesion detection in specific brain regions.

Main Methods:

• Retrospective review of MRI scans from 20 multiple sclerosis patients.
• Comparison of lesion detection between standard PD/T2 sequences and an isotropic 3D FLAIR sequence.
• Independent assessment of whole-brain lesion load and lesion counts in juxtacortical, infratentorial, and midcallosal areas by two observers.

Main Results:

• 3D FLAIR sequences revealed significantly higher whole lesion load and lesion counts in juxtacortical and infratentorial regions compared to PD/T2 sequences.
• No significant difference in midcallosal lesion detection rates was observed between sagittal T2 and 3D FLAIR sequences.
• 3D FLAIR demonstrates enhanced sensitivity for detecting MS lesions in specific brain locations.

Conclusions:

• 3D FLAIR sequences enhance the detection of brain lesions in multiple sclerosis patients.
• These sequences are more sensitive than conventional dual-echo sequences for lesions in cortical and infratentorial locations.
• 3D FLAIR sequences may potentially replace current PD/T2 and mid-sagittal T2 sequences in MS MRI protocols.