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Kinematic MRI of the normal shoulder using a specially designed positioning device
Osamu Tokuda1, Yoshie Kunihiro, Naofumi Matsunaga
1Department of Radiology, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan.
Journal of Computer Assisted Tomography
|November 20, 2002
Summary
Kinematic MRI reveals normal glenohumeral joint motion and labrocapsular structures. This imaging technique visualizes the labrum and capsule without contrast agents, aiding in understanding joint mechanics.
Area of Science:
- Orthopedics
- Radiology
- Biomechanics
Background:
- Understanding the normal glenohumeral joint's biomechanics is crucial for diagnosing pathologies.
- Kinematic magnetic resonance imaging (MRI) offers a dynamic approach to assess joint function.
Purpose of the Study:
- To define normal glenohumeral joint patterns using kinematic MRI.
- To evaluate the labrocapsular ligamentous complex in healthy volunteers.
Main Methods:
- Ten healthy volunteers underwent open MRI scans.
- Axial 3D gradient-echo images were acquired at 30-degree increments of rotation.
Main Results:
- Slight mobility of the anterior (40%) and posterior (10%) labrum was observed.
- Increased signal intensity in the anterior labrum (20%) was noted, with shape changes in the anterior capsule (60%).
Conclusions:
- Kinematic MRI effectively visualizes the labrocapsular ligamentous complex.
- This method provides valuable joint information without requiring contrast injection.