A New Method for Measuring Glenoid Version on Standard Magnetic Resonance Imaging

Area of Science:

• Orthopedics
• Radiology
• Biomedical Engineering

Background:

• Assessing glenoid version is crucial for shoulder conditions, but current methods like CT and MRI have limitations.
• Computed tomography (CT) involves radiation exposure, while standard magnetic resonance imaging (MRI) may not capture the entire scapula.
• Reliable measurement of glenoid version is essential for diagnosing and managing shoulder instability.

Purpose of the Study:

• To investigate the reliability of a novel method for measuring glenoid version using routine shoulder MRI.
• To establish a practical and radiation-free alternative to CT for glenoid version assessment.
• To evaluate the intra- and interobserver reliability of the proposed MRI technique.

Main Methods:

• A new method for measuring osseous and chondrolabral glenoid version on standard axial MRI was developed.
• Three clinicians assessed MRI images of 20 patients with shoulder instability.
• Measurements were repeated after three months to determine intra- and interobserver reliability using intraclass correlation coefficients (ICCs).

Main Results:

• The novel MRI method demonstrated good to excellent intraobserver reliability (ICC ≥ .66) for most glenoid measurements.
• Excellent interobserver reliability (ICC ≥ .84) was observed for most measurements.
• Poor reliability (ICC ≤ .41) was noted for some inferior glenoid measurements.

Conclusions:

• The proposed MRI method is a simple, practical, and reliable tool for assessing glenoid version in shoulder instability patients.
• This technique can potentially reduce the reliance on CT scans, thereby minimizing radiation exposure.
• The findings support the use of routine MRI for accurate glenoid version measurement in clinical practice.