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Recent Advances in Electrical & Electronic Engineering

Author(s): Yuan Zhang*, Liyi Zhang and Yunshan Sun

DOI: 10.2174/2352096513999200606224154

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Rigid Motion Artifact Reduction in CT Using the Phase Correlation Method

Page: [1119 - 1128] Pages: 10

  • * (Excluding Mailing and Handling)

Abstract

Background: In Computed Tomography (CT), it is often not possible for the subject to remain stationary during a scan. Unfortunately, a patient motion would result in degraded spatial resolution and image artifacts. It is desirable to improve reconstruction quality and reduce motion artifacts caused by patient motion.

Methods: In this work, a method was proposed to eliminate the influence of the motion on image quality, based on the phase correlation method. Based on our previous work, projections were first taken by Radon transform and motion parameters were estimated by the phase-only correlation of projections in the Radon domain. In addition, an improved image reconstruction algorithm was performed to compensate for the motion effects.

Results: Experimental results proved that the proposed method could not only obtain high precision and good real-time performance but also ensure a superior artifact reduction.

Conclusion: Besides, the efficacy of the proposed method has been demonstrated in both simulated and human head experiments.

Keywords: CT, fan-beam, motion artifacts, motion estimation, motion compensation, phase correlation method.

Graphical Abstract

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