# Dual-Energy Computed Tomography, a New Metal Artifact Reduction Technique for Total Hip Arthroplasty: Is There a Light in the Darkness?

## TL;DR

This paper reviews how dual-energy CT compares to traditional CT for imaging hip implants and surrounding tissues, finding mixed results and a need for standardized methods.

## Contribution

The paper systematically reviews DECT's application in THA imaging and highlights the lack of consensus on optimal protocols.

## Key findings

- DECT shows variability in imaging periprosthetic bone and soft tissues due to differences in equipment and protocols.
- Virtual monochromatic imaging with MAR improves image quality, but optimal energy levels remain undetermined.
- Multicenter studies with standardized protocols are needed to compare DECT techniques effectively.

## Abstract

Background/Objectives: To evaluate dual-energy computed tomography (DECT) in comparison with conventional CT for periprosthetic bone and surrounding soft tissues in total hip arthroplasty (THA). Methods: Two authors independently screened titles and abstracts for eligibility, discussing any disagreements with a third author for final decisions. The articles were categorized into two main groups: those focusing on periprosthetic bone and those on blood vessels or pelvic organs. Results: A total of 37 articles were selected to be included in this systematic review. Conclusions: Our systematic review reveals significant variability in the use of DECT for periprosthetic bone and soft tissue imaging, due to differences in equipment, protocols, and clinical settings. While many studies indicate that virtual monochromatic imaging (VMI), especially when combined with metal artifact reduction (MAR), improves image quality, there is no consensus on optimal energy levels. Future research should focus on large-scale, multicenter studies with standardized protocols to compare reconstruction techniques, energy levels, and combined MAR-VMI use.