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Technical errors in MR arthrography
1Radiology, Orthopaedic University Hospital of Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland. juerg.hodler@balgrist.ch
Abstract:
This article discusses potential technical problems of MR arthrography. It starts with contraindications, followed by problems relating to injection technique, contrast material and MR imaging technique. For some of the aspects discussed, there is only little published evidence. Therefore, the article is based on the personal experience of the author and on local standards of procedures. Such standards, as well as medico-legal considerations, may vary from country to country. Contraindications for MR arthrography include pre-existing infection, reflex sympathetic dystrophy and possibly bleeding disorders, avascular necrosis and known allergy to contrast media. Errors in injection technique may lead to extra-articular collection of contrast agent or to contrast agent leaking from the joint space, which may cause diagnostic difficulties. Incorrect concentrations of contrast material influence image quality and may also lead to non-diagnostic examinations. Errors relating to MR imaging include delays between injection and imaging and inadequate choice of sequences. Potential solutions to the various possible errors are presented.
Insights
This article addresses technical challenges in MR arthrography, covering contraindications, injection, contrast material, and imaging techniques. It offers solutions to common errors for improved diagnostic accuracy in joint imaging.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Magnetic Resonance (MR) arthrography is a key diagnostic tool for joint pathologies.
- Technical challenges can compromise the accuracy and diagnostic yield of MR arthrography.
Purpose of the Study:
- To identify and discuss potential technical problems encountered during MR arthrography.
- To present solutions for common errors in MR arthrography procedures.
Main Methods:
- Review of contraindications for MR arthrography.
- Analysis of issues related to injection technique, contrast material, and MR imaging parameters.
- Discussion based on author's experience and local procedural standards.
Main Results:
- Identified contraindications include infection, reflex sympathetic dystrophy, bleeding disorders, avascular necrosis, and contrast allergy.
- Injection errors can cause extra-articular contrast collections or leakage, leading to diagnostic difficulties.
- Suboptimal contrast concentration, delayed imaging, and incorrect MR sequences degrade image quality and diagnostic value.
Conclusions:
- Addressing technical issues in MR arthrography is crucial for accurate joint assessment.
- Standardized protocols and careful technique can mitigate common errors and enhance diagnostic outcomes.
