Dedicated CT and MRI Techniques for the Evaluation of the Postoperative Knee

Iman Khodarahmi; Elliot K. Fishman; Jan Fritz

doi:10.1055/s-0038-1653955

Seminars in Musculoskeletal Radiology, Table of Contents

Semin Musculoskelet Radiol 2018; 22(04): 444-456
DOI: 10.1055/s-0038-1653955

Review Article

Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Dedicated CT and MRI Techniques for the Evaluation of the Postoperative Knee

Authors

Iman Khodarahmi

¹Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
Elliot K. Fishman

¹Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
Jan Fritz

¹Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland

Abstract

Advances in surgical techniques, orthopaedic implant design, and higher demands for improved functionality of the aging population have resulted in a high prevalence of patients with metallic implants about the knee. Total knee arthroplasty, knee-replacing tumor prostheses, and osteosynthesis implants create various imaging artifacts and pose special challenges for the imaging evaluation with computed tomography (CT) and magnetic resonance imaging (MRI). CT artifacts can be effectively mitigated with metal artifact reduction reconstruction algorithms, dual-energy data acquisition with virtual monoenergetic extrapolation, and three-dimensional postprocessing techniques, such as volume and cinematic rendering. Artifacts related to metal implants on MRI can be reduced via optimization of the scan parameters and using advanced techniques such as multi-acquisition variable-resonance image combination, and slice encoding for metal artifact correction.

Keywords

knee - arthroplasty - artifact - computed tomography - magnetic resonance imaging

Full Text

References

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