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Updated: May 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
Metal artefact reduction with cone beam CT: an in vitro study
B B Bechara1, W S Moore, C A McMahan
1Department of Oral and Maxilloficial Radiology, University of Texas Health Science Centre at San Antonio, TX, USA. boulosbchara@hotmail.com
Dento Maxillo Facial Radiology
|January 14, 2012
Summary
A new metal artifact reduction algorithm significantly improves cone beam CT imaging quality. This software enhances the contrast-to-noise ratio, providing clearer diagnostic images by reducing metal artifacts.
Area of Science:
- Dental Imaging
- Medical Physics
- Radiology
Background:
- Metal restorations in patients can cause artifacts in cone beam CT (CBCT) scans, compromising diagnostic image quality.
- A new algorithm and software (Picasso Master 3D®) have been developed to reduce these metal streak artifacts.
Purpose of the Study:
- To evaluate the effectiveness of a novel metal artifact reduction (MAR) algorithm.
- To determine if the MAR algorithm enhances the contrast-to-noise ratio (CNR) in CBCT images.
Main Methods:
- A phantom with metallic beads and bone substitutes was imaged with and without the MAR algorithm.
- Image datasets were acquired at varying peak kilovoltages (kVp).
- Image analysis involved evaluating grey level variations and calculating the CNR using ImageJ software.
Main Results:
- The MAR algorithm effectively reduced grey value variations caused by metal artifacts.
- The contrast-to-noise ratio was significantly increased when the MAR algorithm was applied.
- Image quality and artifact reduction were optimal when the phantom was centered and MAR was active.
- Higher peak kilovoltage improved overall image quality.
Conclusions:
- The metal artifact reduction algorithm demonstrably improves image quality in CBCT scans.
- Utilizing this MAR algorithm leads to enhanced diagnostic accuracy by minimizing metal-induced artifacts.
