Incremental value of dual-energy CT to coronary CT angiography for the detection of significant coronary stenosis: comparison with quantitative coronary angiography and single photon emission computed tomography

  • Rui Wang
  • Wei Yu
  • Yongmei Wang
  • Yi He
  • Lin Yang
  • Tao Bi
  • Jian Jiao
  • Qian Wang
  • Liquan Chi
  • Yang Yu
  • Zhaoqi ZhangEmail author
Original Paper


To determine the value of dual-energy CT (DECT) and combined information of perfusion and angiography in diagnosing coronary artery disease (CAD), with single photon emission computed tomography (SPECT) and quantitative coronary angiography (QCA) as a reference standard. Thirty-four patients were enrolled in this study. DECT was used as a contrast-enhanced retrospectively ECG-gated scan protocol during the rest state and tubes were set at 140/100 kV. DECT angiography (DE-CTA) and DECT perfusion (DE-CTP) were calculated from two kV images. DE-CTP results were compared with SPECT and DE-CTA with QCA, respectively. The combined DE-CTP with DE-CTA data were compared to QCA in diagnosis of obstructive CAD (stenosis ≥ 50%). DECT showed diagnostic image quality in 31 patients. Using SPECT as a reference, DE-CTP had sensitivity of 68%, specificity of 93%, and sensitivity of 81%, and specificity of 92% for identifying any type of perfusion deficits on the segment- and territory-based analysis, respectively. Using QCA as a reference standard, DE-CTA showed sensitivity of 82%, specificity of 91% and accuracy of 86% for detecting ≥50% coronary stenosis on the vessel-based analysis, whereas the combination of DE-CTA and DE-CTP gave sensitivity of 90%, specificity of 86% and accuracy of 88% for detecting ≥50% coronary stenosis, respectively. Combination of DE-CTP and DE-CTA may improve diagnostic performance compared to CTA alone for the diagnosis of significant coronary stenosis.


Dual energy computed tomography Dual-source computed tomography Coronary artery disease Myocardial perfusion 


Conflict of interest



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Copyright information

© Springer Science+Business Media, B.V. 2011

Authors and Affiliations

  • Rui Wang
    • 1
  • Wei Yu
    • 1
  • Yongmei Wang
    • 1
  • Yi He
    • 1
  • Lin Yang
    • 1
  • Tao Bi
    • 1
  • Jian Jiao
    • 2
  • Qian Wang
    • 2
  • Liquan Chi
    • 3
  • Yang Yu
    • 3
  • Zhaoqi Zhang
    • 1
    Email author
  1. 1.Department of Radiology, Anzhen HospitalCapital Medical UniversityBeijingChina
  2. 2.Department of Nuclear Medicine, Anzhen HospitalCapital Medical UniversityBeijingChina
  3. 3.Department of Cardiology, Anzhen HospitalCapital Medical UniversityBeijingChina

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