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Area of Science:

  • Medical Imaging
  • Cardiology
  • Biomedical Engineering

Background:

  • Current cardiac computed tomography (CT) methods for measuring left atrial (LA) wall thickness (WT) are observer-dependent.
  • These methods lack rapid and comprehensive visualization of global LA WT.

Purpose of the Study:

  • To develop and validate a novel LA wall-mapping application for displaying global LA WT on a coplanar plane.
  • To assess the accuracy, intra-observer, and inter-observer reproducibility of this CT-based application.

Main Methods:

  • Validation using digital and physical phantoms, CT images from eight patients, and six pig cardiac specimens.
  • Generation of expanded maps from CT images for comparison with digital phantoms and physical specimens.
  • Assessment of reproducibility using intraclass correlation coefficients (ICC) and correlation analysis (r).

Main Results:

  • No significant differences were found between phantom and CT-based measurements.
  • High intra-observer (ICC > 0.9) and inter-observer (ICC > 0.8) reproducibility were demonstrated.
  • Excellent correlation (r = 0.96, p < 0.001) was observed between pig heart specimen and CT data.

Conclusions:

  • The developed LA wall-mapping application provides accurate and reproducible measurements of LA WT.
  • This tool enhances the visualization and quantification of LA architecture from CT images.
  • The application holds potential for improved cardiac imaging analysis and understanding of LA remodeling.