Three-Dimensional Zero Echo Time Magnetic Resonance Imaging Versus 3-Dimensional Computed Tomography for Glenoid Bone...

Area of Science:

• Orthopedic imaging
• Radiology
• Biomedical engineering

Background:

• Assessing glenoid bone morphology is crucial for diagnosing and managing shoulder instability.
• Computed tomography (CT) is commonly used, but magnetic resonance imaging (MRI) offers better soft-tissue contrast.

Purpose of the Study:

• To evaluate the efficacy of 3D zero echo time (ZTE) MRI for glenoid bone assessment.
• To compare 3D ZTE MRI with 3D CT in evaluating glenoid bone dimensions.

Main Methods:

• 3D ZTE MRI and multislice CT scans were performed on shoulder specimens and patients with glenohumeral instability.
• Two radiologists generated 3D en face glenoid images.
• Inter-modality and inter-rater agreement, post-processing times, and glenoid widths were analyzed.

Main Results:

• Excellent agreement (ICC ≥ 0.92) was observed between 3D ZTE MRI and 3D CT for glenoid width assessment across both ex vivo and in vivo studies.
• Mean differences in glenoid width measurements between CT and MRI were minimal (0.3–1 mm) depending on MRI resolution.
• Post-processing times for generating 3D glenoid images were comparable between CT and ZTE MRI.

Conclusions:

• 3D ZTE MRI is a reliable technique for determining glenoid width.
• The technique demonstrates high agreement with CT, suggesting its potential for clinical integration.
• 3D ZTE MRI can be readily incorporated into the clinical workflow for shoulder instability assessment.