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Updated: Jun 25, 2026
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Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences
Published on: May 17, 2018
Evaluation of the X-ray digital linear tomosynthesis reconstruction processing method for metal artifact reduction
Tsutomu Gomi1, Hiroshi Hirano, Tokuo Umeda
1School of Allied Health Sciences, Kitasato University, Kitasato 1-15-1, Sagamihara, Kanagawa 228-8555, Japan. gomi@kitasato-u.ac.jp
Summary
This study presents a new method to reduce metal artifacts in X-ray digital linear tomosynthesis (DLT) imaging of hip prostheses. The technique improves image quality for better prosthetic evaluation.
Area of Science:
- Medical Imaging
- Radiology
- Image Reconstruction
Background:
- Metal artifacts in X-ray digital linear tomosynthesis (DLT) hinder the evaluation of hip prostheses.
- These artifacts arise from high-attenuation materials and the limited projection data in DLT.
- Current DLT methods struggle with image quality degradation due to metallic components.
Purpose of the Study:
- To evaluate a novel X-ray digital linear tomosynthesis reconstruction processing method for metal artifact reduction.
- To enhance the visibility of prosthetic cases and improve diagnostic accuracy in hip prosthesis imaging.
- To demonstrate the potential of artifact reduction for DLT in evaluating hip prostheses.
Main Methods:
- Utilized a volumetric X-ray digital linear tomosynthesis instrument to image a hip prosthesis.
- Developed artifact reduction techniques using a modified Shepp and Logan reconstruction filter kernel.
- Incorporated weighting by direct current (DC) components in the frequency domain to adjust low-frequency content.
Main Results:
- The modified reconstruction filter kernel effectively reduced ghosting artifacts caused by metal implants.
- Image quality was significantly improved, enhancing the visibility of the prosthetic case.
- The method demonstrated a quantifiable reduction in metal artifacts in DLT images.
Conclusions:
- The developed artifact reduction processing method is effective for digital linear tomosynthesis of hip prostheses.
- This technique improves image quality and aids in the evaluation of metallic orthopedic devices.
- Future work will explore DLT's capability in quantifying spatial relationships and identifying bony changes.
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