MR Imaging of Knee Arthroplasty Implants

Area of Science:

• Orthopedic Surgery
• Radiology
• Biomedical Engineering

Background:

• Total knee arthroplasty (TKA) is effective but can lead to complications over time.
• Accurate diagnosis of TKA complications is crucial for timely intervention and revision surgery.
• Increasing TKA rates and younger patient age necessitate improved diagnostic tools.

Purpose of the Study:

• To review strategies for magnetic resonance (MR) imaging of knee arthroplasty implants.
• To illustrate imaging findings of common TKA complications.
• To provide a systematic approach for evaluating MR imaging of knee implants.

Main Methods:

• Utilizing optimized conventional and advanced MR pulse sequences.
• Implementing metal artifact reduction techniques for improved visualization.
• Reviewing imaging appearances of various arthroplasty failure modes.

Main Results:

• Optimized MR imaging significantly reduces metallic artifact around implants.
• Improved visualization of bone, implant-tissue interfaces, and soft tissues is achieved.
• MR imaging aids in diagnosing aseptic loosening, infections, wear, and other complications.

Conclusions:

• MR imaging with artifact reduction is valuable for diagnosing TKA complications.
• It provides crucial information for prognosis, risk stratification, and surgical planning.
• This approach supports effective management of symptomatic joints post-TKA.