Metal About the Hip and Artifact Reduction Techniques: From Basic Concepts to Advanced Imaging.

Area of Science:

• Medical Imaging
• Orthopedic Surgery
• Biomedical Engineering

Background:

• Aging populations are increasing demand for hip replacement surgeries (hip arthroplasty).
• Effective postoperative monitoring is crucial for detecting complications with failing implants.
• Metal artifacts in MRI and CT scans hinder accurate diagnosis of implant issues.

Purpose of the Study:

• To review methods for mitigating metal artifacts in medical imaging after hip arthroplasty.
• To highlight advanced imaging techniques for improved detection of postoperative outcomes and complications.

Main Methods:

• Magnetic Resonance Imaging (MRI): Metal Artifact Reduction Sequence (MARS) MRI, Slice Encoding for Metal Artifact Correction (SEMAC), and Multi-Acquisition Variable-Resonance Image Combination (MAVRIC).
• Computed Tomography (CT): Dual-energy CT with virtual monochromatic reconstruction, metal artifact reduction reconstruction algorithms, and postprocessing visualization.

Main Results:

• MARS MRI techniques optimize conventional sequences using multispectral and multispatial imaging to reduce metal artifacts.
• CT artifact reduction is achieved through dual-energy techniques and advanced reconstruction algorithms.
• These methods enhance image quality, enabling better characterization of failing implants.

Conclusions:

• Advanced imaging techniques are essential for overcoming metal artifact challenges in hip arthroplasty follow-up.
• Improved image quality facilitates accurate detection and management of postoperative complications.
• These methods support better patient outcomes in an aging demographic.