High-Resolution US of Rheumatologic Diseases

Area of Science:

• Rheumatology
• Medical Imaging
• Diagnostic Ultrasound

Background:

• High-resolution ultrasonography (US) has been a routine tool for rheumatologic disease evaluation for 15 years.
• US utilizes high-frequency linear transducers for detailed imaging of joint structures.
• Its diagnostic capabilities for erosions, effusions, and synovitis are comparable to MRI, excluding bone marrow edema.

Purpose of the Study:

• To describe the high-resolution US technique for evaluating rheumatologic diseases of the wrist, hand, ankle, and foot.
• To demonstrate characteristic US findings in various arthropathies.
• To highlight the role of Doppler and contrast-enhanced US in assessing disease activity and guiding interventions.

Main Methods:

• Utilized high-resolution ultrasonography with high-frequency linear transducers.
• Employed gray-scale, color/power Doppler, and contrast-enhanced US.
• Focused on evaluating joints, bursae, and tendon sheaths in the wrist, hand, ankle, and foot.

Main Results:

• US effectively differentiates crystal deposition diseases (gout, CPPD) from inflammatory arthropathies.
• Characteristic US appearances of enthesopathy aid in distinguishing psoriatic and reactive arthritis.
• Doppler signal indicates active synovitis; contrast agents enhance vascularity detection.

Conclusions:

• High-resolution US is a powerful, non-invasive tool for diagnosing and monitoring diverse rheumatologic conditions.
• US-guided aspirations and injections are frequently performed.
• Future applications include using microbubble contrast agents for targeted drug delivery.