[Diagnosis. Radiological study. Ultrasound, computed tomography and magnetic resonance imaging]

Area of Science:

• Radiology
• Orthopedics
• Primary Care Medicine

Background:

• Osteoarthritis diagnosis and management rely heavily on imaging techniques.
• Choosing the appropriate imaging modality is crucial for effective patient care and resource allocation.

Purpose of the Study:

• To evaluate the role and indications of various imaging modalities in the diagnosis and follow-up of osteoarthritis.
• To provide guidance on the appropriate use of X-ray, ultrasound, CT, and MRI in osteoarthritis management within primary care.

Main Methods:

• Review of current literature and clinical guidelines on imaging in osteoarthritis.
• Analysis of the cost-effectiveness, accessibility, and diagnostic yield of different imaging techniques.

Main Results:

• Simple X-ray is the preferred first-line imaging for osteoarthritis due to low cost, availability, and ease of interpretation.
• Ultrasound's role in osteoarthritis remains limited despite broader applications in rheumatology.
• Computed tomography (CT) has niche applications for complex joints like sacroiliac and facet joints.
• Magnetic resonance imaging (MRI) is valuable for cartilage and subchondral bone but is costly and best for highly selected patients.
• Indications for advanced imaging (ultrasound, CT, MRI) in primary care are limited and often necessitate hospital referral.
• Patient safety, particularly avoiding excessive ionizing radiation from unnecessary X-rays or CT scans, is paramount.

Conclusions:

• Simple X-ray should be the initial imaging choice for osteoarthritis by family physicians when indications are clear and results influence management.
• Advanced imaging techniques (ultrasound, CT, MRI) have specific, limited roles in osteoarthritis and should be used judiciously, prioritizing patient safety and cost-effectiveness.