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Evaluation of image quality of coronary artery plaque with rapid kVp-switching dual-energy CT

Published:February 01, 2017DOI:https://doi.org/10.1016/j.clinimag.2017.01.014

      Highlights

      • The image quality of coronary artery components across a range of dual-energy CT virtual monochromatic image (VMI) energy levels was analyzed, and the highest image quality was obtained at different energy levels for each plaque component.
      • For coronary lumen, 70 keV VMI provides the beset SNR and CNR.
      • For plaque components other than the coronary lumen, VMI provides plaque images without extensive change of image quality.

      Abstract

      We evaluated the virtual monochromatic imaging (VMI) energy levels that maximize image quality of each coronary plaque component in dual-energy computed tomography angiography in 495 coronary segments (45 for each energy level). Maximal signal-to-noise ratios were different for plaque, lumen, fat, and surrounding tissue (p < 0.05). Maximal contrast-to-noise ratios were observed at 70 keV for calcified plaque (CP), non-calcified plaque (NCP), and fat in comparison with the lumen (p < 0.05), and 70 keV and 120 keV for NCP in comparison with fat (p = 0.144).
      VMI demonstrated maximal image quality at different energy levels for each component of coronary artery plaque.

      Keywords

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