Detecting Bone Erosions in Rheumatoid Arthritis with Radiography and MRI
Author Information
Author(s): Ejbjerg Bo Jannik, Vestergaard Aage, Jacobsen Søren, Thomsen Henrik, Østergaard Mikkel
Primary Institution: Copenhagen University Hospitals
Hypothesis
Can conventional radiography effectively detect bone erosions of different sizes in rheumatoid arthritis patients compared to MRI?
Conclusion
Conventional radiography requires a significant bone erosion volume of 20% to 30% for detection, indicating that MRI is superior for identifying minor erosive changes.
Supporting Evidence
- MRI detected 123 erosions in 276 MCP joints assessed.
- Conventional radiography missed most small erosions (grades 1 and 2).
- All grade 4 erosions were detected on radiographs.
Takeaway
This study shows that regular X-rays need a lot of bone damage before they can see it, while MRI can find smaller problems much earlier.
Methodology
MRI was used as the standard reference to assess the ability of conventional radiography to detect bone erosions in MCP joints of RA patients.
Potential Biases
Potential bias from the blinding of readers to each other's assessments.
Limitations
The study may not account for all variables affecting detection sensitivity, such as the location of erosions.
Participant Demographics
69 rheumatoid arthritis patients, 57 female and 12 male, median age 51 years.
Digital Object Identifier (DOI)
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