Korean Journal of Radiology

  • 제18권6호
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  • Pages.881-887
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  • 2017
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  • 1229-6929(pISSN)
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  • 2005-8330(eISSN)
대한영상의학회 (The Korean Society of Radiology)
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DOI QR코드

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Effect of a Novel Intracycle Motion Correction Algorithm on Dual-Energy Spectral Coronary CT Angiography: A Study with Pulsating Coronary Artery Phantom at High Heart Rates

  • Xing, Yan (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University) ;
  • Zhao, Yuan (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University) ;
  • Guo, Ning (CT Imaging Research Center, GE Healthcare) ;
  • Pan, Cun-Xue (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University) ;
  • Azati, Gulina (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University) ;
  • Wang, Yan-Wei (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University) ;
  • Liu, Wen-Ya (Imaging Center, The First Affiliated Hospital of Xinjiang Medical University)
  • 투고 : 2016.11.09
  • 심사 : 2017.05.02
  • 발행 : 2017.12.01
⟨ 이전 논문 다음 논문 ⟩

초록

Objective: Using a pulsating coronary artery phantom at high heart rate settings, we investigated the efficacy of a motion correction algorithm (MCA) to improve the image quality in dual-energy spectral coronary CT angiography (CCTA). Materials and Methods: Coronary flow phantoms were scanned at heart rates of 60-100 beats/min at 10-beats/min increments, using dual-energy spectral CT mode. Virtual monochromatic images were reconstructed from 50 to 90 keV at 10-keV increments. Two blinded observers assessed image quality using a 4-point Likert Scale (1 = non-diagnostic, 4 = excellent) and the fraction of interpretable segments using MCA versus conventional algorithm (CA). Comparison of variables was performed with the Wilcoxon rank sum test and McNemar test. Results: At heart rates of 70, 80, 90, and 100 beats/min, images with MCA were rated as higher image scores compared to those with CA on monochromatic levels of 50, 60, and 70 keV (each p < 0.05). Meanwhile, at a heart rate of 90 beats/min, image interpretability was improved by MCA at a monochromatic level of 60 keV (p < 0.05) and 70 keV (p < 0.05). At a heart rate of 100 beats/min, image interpretability was improved by MCA at monochromatic levels of 50 keV (from 69.4% to 86.1%, p < 0.05), 60 keV (from 55.6% to 83.3%, p < 0.05) and 70 keV (from 33.3% to 69.3%, p < 0.05). Conclusion: Low-keV monochromatic images combined with MCA improves image quality and image interpretability in CCTAs at high heart rates.

키워드

과제정보

연구 과제 주관 기관 : Xinjiang Province Natural Science Foundation

참고문헌

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피인용 문헌

  1. Optimal Monochromatic Imaging of Spectral Computed Tomography Potentially Improves the Quality of Hepatic Vascular Imaging vol.19, pp.4, 2017, https://doi.org/10.3348/kjr.2018.19.4.578
  2. A Glimpse on Trends and Characteristics of Recent Articles Published in the Korean Journal of Radiology vol.20, pp.12, 2019, https://doi.org/10.3348/kjr.2019.0928
  3. Influence of Heart Rate and Innovative Motion-Correction Algorithm on Coronary Artery Image Quality and Measurement Accuracy Using 256-Detector Row Computed Tomography Scanner: Phantom Study vol.20, pp.1, 2017, https://doi.org/10.3348/kjr.2018.0251