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MR contrast arthrography (MRA) in osteochondrosis dissecans
J Kramer1, R Stiglbauer, A Engel
1MR-Institute, University of Vienna, Austria.
Journal of Computer Assisted Tomography
|March 1, 1992
Summary
Magnetic resonance arthrography significantly improves the diagnosis of osteochondrosis dissecans (OCD) by enhancing visualization of cartilage and bone. This technique is crucial for accurate staging and treatment planning of OCD knee lesions.
Area of Science:
- Orthopedics
- Radiology
- Medical Imaging
Background:
- Osteochondrosis dissecans (OCD) involves articular cartilage and subchondral bone, potentially leading to fragmentation.
- Accurate assessment of OCD lesions is vital for effective treatment planning.
Purpose of the Study:
- To evaluate the efficacy of magnetic resonance arthrography (MRA) in assessing OCD knee lesions.
- To compare diagnostic accuracy before and after intraarticular contrast administration.
Main Methods:
- 25 knees with OCD were examined using spin echo (SE) and gradient echo (GE) sequences on a 1.5 T MRI.
- MRA was performed following intraarticular injection of Gd-DTPA.
- Results were correlated with arthroscopic or arthrotomy findings.
Main Results:
- Pre-MRA diagnosis accuracy for OCD type was 39.3% (SE) and 57.4% (GE).
- Post-MRA accuracy improved to 92.9% (SE) and 100% (GE).
- MRA accurately assessed cartilaginous changes and fragment separation.
Conclusions:
- MRA significantly enhances diagnostic accuracy for OCD knee lesions.
- MRA is valuable for evaluating articular cartilage and differentiating fragment separation in OCD.