Role of imaging in vasculitis and connective tissue diseases

Area of Science:

• Rheumatology
• Radiology
• Internal Medicine

Background:

• Imaging is crucial for diagnosing large vessel vasculitis (LVV) and identifying organ involvement in connective tissue diseases (CTDs).
• Traditional angiography has limitations in detecting early inflammatory lesions in LVV.

Purpose of the Study:

• To review the role of various imaging modalities in the diagnosis and management of LVV and CTDs.
• To highlight the advantages of newer imaging techniques over conventional angiography for early disease detection.

Main Methods:

• Review of current literature on imaging techniques for LVV and CTDs.
• Comparison of angiography, color Doppler ultrasonography, CT angiography, MR imaging/angiography, and 18F-FDG PET in detecting vascular and organ abnormalities.

Main Results:

• Advanced imaging (ultrasonography, CTA, MRA) can detect vessel wall changes missed by angiography, enabling earlier diagnosis of LVV.
• 18F-FDG PET is sensitive for detecting inflamed vessels but does not visualize the vessel wall.
• MRI is preferred for brain involvement in CTDs, while CT is optimal for lung disease.

Conclusions:

• Advanced imaging modalities offer superior detection of early vascular and organ involvement in LVV and CTDs compared to traditional angiography.
• These techniques are valuable for patient follow-up and treatment monitoring.
• Interpretation of imaging findings requires integration with the overall clinical context due to potential lack of specificity.