Direct MR arthrography without image guidance: a practical guide, joint-by-joint

Area of Science:

• Radiology and Imaging
• Musculoskeletal System
• Medical Procedures

Background:

• Direct MR arthrography (dMRA) is essential for diagnosing peripheral joint pathologies.
• Current dMRA relies on imaging guidance (ultrasound, fluoroscopy) for injections.
• Anatomical landmark-guided puncture offers a potential alternative in specific scenarios.

Purpose of the Study:

• To detail the indications and techniques for performing dMRA without image guidance.
• To provide a joint-by-joint anatomical guide for landmark-based injections.
• To serve as a reference for safe and effective dMRA needle placement.

Main Methods:

• Detailed description of anatomical landmarks for dMRA in shoulder, hip, wrist, knee, elbow, and ankle.
• Guidance on optimal needle trajectories and structures to avoid for each joint.
• Techniques to achieve adequate joint distension with diluted contrast.

Main Results:

• Identification of key anatomical landmarks for successful intra-articular contrast injection.
• Demonstration of safe and effective dMRA needle insertion techniques without imaging.
• Practical tips for optimizing joint distension in various peripheral joints.

Conclusions:

• Direct MR arthrography can be performed safely and effectively using anatomical landmarks.
• This landmark-based approach provides a valuable alternative when imaging guidance is unavailable.
• The study serves as a comprehensive guide for clinicians performing image-free dMRA.