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Updated: May 10, 2026
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
Quantitative analysis of titanium-induced artifacts and correlated factors during micro-CT scanning
Jun Yuan Li1, Edmond Ho Nang Pow, Li Wu Zheng
1Oral Rehabilitation, Prince Philip Dental Hospital, The University of Hong Kong, Hong Kong SAR, China.
Objectives:
To investigate the impact of cover screw, resin embedment, and implant angulation on artifact of microcomputed tomography (micro-CT) scanning for implant.
Materials And Methods:
A total of twelve implants were randomly divided into 4 groups: (i) implant only; (ii) implant with cover screw; (iii) implant with resin embedment; and (iv) implants with cover screw and resin embedment. Implants angulation at 0°, 45°, and 90° were scanned by micro-CT. Images were assessed, and the ratio of artifact volume to total volume (AV/TV) was calculated. A multiple regression analysis in stepwise model was used to determine the significance of different factors. One-way ANOVA was performed to identify which combination of factors could minimize the artifact.
Results:
In the regression analysis, implant angulation was identified as the best predictor for artifact among the factors (P < 0.001). Resin embedment also had significant effect on artifact volume (P = 0.028), while cover screw had not (P > 0.05). Non-embedded implants with the axis parallel to X-ray source of micro-CT produced minimal artifact.
Conclusions:
Implant angulation and resin embedment affected the artifact volume of micro-CT scanning for implant, while cover screw did not.
