Imaging of hip arthroplasty

Area of Science:

• Orthopedic imaging
• Radiology
• Arthroplasty evaluation

Background:

• Persistent or recurrent symptoms after hip arthroplasty necessitate thorough imaging evaluation.
• Initial assessment typically involves radiographs, with further imaging modalities used as needed.
• Identifying the cause of hip arthroplasty dysfunction is crucial for appropriate management.

Purpose of the Study:

• To review the common etiologies of painful or dysfunctional hip arthroplasty.
• To illustrate the imaging appearances of these complications.
• To emphasize the role of Magnetic Resonance (MR) imaging in hip arthroplasty evaluation.

Main Methods:

• Review of imaging modalities including radiography, arthrography, scintigraphy, computed tomography, and MR imaging.
• Focus on MR imaging protocols and metal artifact reduction techniques.
• Discussion of imaging findings for various hip arthroplasty complications.

Main Results:

• Common causes of hip arthroplasty failure include mechanical loosening, osteolysis, adverse local tissue reaction, infection, fractures, heterotopic ossification, tendinopathy, and nerve injury.
• MR imaging is identified as the most comprehensive modality for evaluating these complications.
• Optimized MR protocols and metal artifact reduction techniques enhance diagnostic accuracy.

Conclusions:

• A systematic imaging approach is essential for diagnosing hip arthroplasty complications.
• MR imaging plays a pivotal role in the comprehensive evaluation of painful or dysfunctional hip arthroplasty.
• Understanding the diverse imaging appearances of these conditions guides clinical decision-making.