Dynamic imaging with dual-source gated Computed Tomography (CT): Implications of motion parameters on image quality for wrist imaging

Puay Yong Neo, Ita Suzana Mat Jais, Christoph Panknin, Chin Cheung Lau, Lai Peng Chan, Kai Nan An, Shian Chao Tay

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Objective: Dynamic Computed Tomography (CT) promises insights into the pathophysiology of carpal instability by recording images of the carpus while it is in motion. The purpose of this study was to investigate the effect of motion velocity on image quality for dynamic carpal imaging applications using a clinical dual-source CT (DSCT) scanner. Methods: A phantom with targets in the axial, coronal and sagittal planes was attached to a motion simulator and imaged using a 64-slice DSCT scanner. Data was acquired when the phantom was stationary and during periodic linear motion. Spatial resolution, motion artifacts and banding artifacts were assessed. Results: Mean spatial resolution was 0.82. mm at 36. mm/s and 0.79. mm at 18. mm/s. Banding artifacts were mild at 36. mm/s and minimal at 18. mm/s. Motion artifacts were minimal at motion velocity of up to 36. mm/s in both the coronal and sagittal planes. Axial plane motion artifacts were moderate at 36. mm/s and mild at 18. mm/s. Discussion: Sub-millimeter resolution is achievable with commercially available DSCT scanners with mild to moderate amounts of motion artifacts at velocities of 18. mm/s and 36. mm/s respectively.

Original languageEnglish (US)
Pages (from-to)1837-1842
Number of pages6
JournalMedical Engineering and Physics
Volume35
Issue number12
DOIs
StatePublished - Dec 1 2013

Keywords

  • 4DCT
  • Computed tomography
  • DSCT
  • Dual source CT
  • Image quality
  • Real-time imaging

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering

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