Related Experiment Video
Updated: Dec 12, 2025
Signal Acquisition, Score Interpretation, and Economics of a Non-Invasive Point-of-Care Test for Coronary Artery Disease
Published on: August 9, 2024
Role of DECT in coronary artery disease: a comparative study with ICA and SPECT
Kamireddy V Prasad Reddy1, Manphool Singhal1, Rajesh Vijayvergiya2
1Department of Radiodiagnosis and Imaging, Postgraduate Institute of Medical Training and Research, Chandigarh, India.
Insights
Dual-energy computed tomography (DECT) accurately detects coronary artery stenosis and myocardial ischemia. This imaging technique provides both morphological and functional assessment of coronary artery disease (CAD) in a single scan.
Area of Science:
- Cardiovascular Imaging
- Radiology
- Medical Diagnostics
Background:
- Traditional imaging for coronary artery disease (CAD) often assesses morphology or function separately.
- Dual-energy computed tomography (DECT) offers the potential for simultaneous morphological and functional assessment of myocardial blood supply.
Purpose of the Study:
- To evaluate the diagnostic accuracy of DECT in identifying both morphological and functional aspects of CAD.
- To compare DECT's performance against invasive coronary angiography (ICA) for stenosis detection and single-photon emission computed tomography (SPECT) for perfusion defects.
Main Methods:
- Twenty-five patients with suspected or known CAD underwent DECT and SPECT prior to ICA.
- DECT was performed with ECG gating, generating both CT coronary angiography and perfusion images from the same raw data.
- Diagnostic accuracy was assessed by comparing DECT coronary angiography to ICA for stenosis (≥50%) and DECT perfusion to SPECT for perfusion defects.
Main Results:
- DECT coronary angiography demonstrated high accuracy for detecting significant stenosis (≥50%), with sensitivity, specificity, and accuracy of 92.1%, 96.1%, and 93.7% on a vessel-based analysis compared to ICA.
- DECT perfusion showed good diagnostic performance for myocardial perfusion defects, achieving 90.7% sensitivity and 84.7% accuracy on a per-territorial basis compared to SPECT.
- DECT provided integrative imaging of coronary artery morphology and myocardial perfusion within a single examination.
Conclusions:
- DECT is a highly accurate imaging modality for diagnosing coronary artery stenosis and myocardial ischemia.
- DECT enables simultaneous assessment of coronary artery morphology and myocardial perfusion, offering an integrated diagnostic approach for CAD.
Purpose:
Earlier imaging techniques for coronary artery disease (CAD) focused primarily on either morphological or functional assessment of CAD. However, dual-energy computed tomography (DECT) can be used to assess myocardial blood supply both morphologically and functionally. We aimed to evaluate the diagnostic accuracy of DECT in detecting morphological and functional components of CAD, using invasive coronary angiography (ICA) and single photon emission computed tomography (SPECT) as reference standards.
Methods:
Twenty-five patients with known or suspicious CAD and scheduled for ICA were investigated by DECT and SPECT. DECT was performed during the resting state using retrospective electrocardiography (ECG) gating. CT coronary angiography and perfusion images were generated from the same raw data. All patients were evaluated for significant stenosis (≥50%) on both ICA and DECT coronary angiography, and for myocardial perfusion defects on SPECT and DECT perfusion. Comparison was done between ICA and DECT coronary angiography for detection of significant stenosis and between SPECT and DECT perfusion for detecting myocardial perfusion defects.
Results:
Using ICA as reference standard, sensitivity, specificity, and accuracy of DECT coronary angiography in detecting ≥50% stenosis of coronary artery lumen were 81.6%, 97.8%, and 95.0%, respectively, by segment-based analysis and 92.1%, 96.1%, and 93.7%, respectively, by vessel-based analysis. Using SPECT as the reference standard, the sensitivity, specificity, and accuracy of DECT perfusion in detecting myocardial perfusion defects were 70.4%, 86.4%, and 80.6%, respectively, on per-segment analysis and 90.7%, 66.6%, and 84.7%, respectively, on per-territorial basis.
Conclusion:
DECT accurately detected coronary artery stenosis and myocardial ischemia using ICA and SPECT as reference standards. In the same scan, DECT can accurately provide integrative imaging of coronary artery morphology and myocardial perfusion.
Related Concept Videos
01:30Acute Coronary Syndrome III: Diagnostic Studies
01:27Coronary Artery Disease V: Interprofessional Care
01:28Imaging Studies for Cardiovascular System V: CT
01:30Coronary Artery Disease I: Introduction
01:25Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT
01:26Coronary Artery Disease II: Pathophysiology