Computed Tomography Coronary Angiography on a Detector-Based Spectral Computed Tomography Platform: Evaluation of Patients With Coronary Artery Disease Reporting and Data System Score of 3 and Higher : Journal of Computer Assisted Tomography

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Cardiovascular: Cardiac

Computed Tomography Coronary Angiography on a Detector-Based Spectral Computed Tomography Platform: Evaluation of Patients With Coronary Artery Disease Reporting and Data System Score of 3 and Higher

Igi, Mae MD∗; Miller, Jenna MD†; Sayers, Kia MD‡; Smith, David L. MD∗; Toshav, Aran MD§; Batte, Catherine MS∥; Spieler, Bradley MD∗; Danrad, Raman MD§

Author Information

From the ∗Louisiana State University at New Orleans, New Orleans, LA

†University of Pennsylvania, Philadelphia, PA

‡Yale University, New Haven, CT

§Louisiana State University at New Orleans, Philips Speaker's Bureau, New Orleans

∥Louisiana State University at Baton Rouge, Baton Rouge, LA.

Received for publication November 30, 2021; accepted July 14, 2022.

Correspondence to: Mae Igi MD, Louisiana State University at New Orleans, Department of Radiology, 1542 Tulane Ave, Rm 353, New Orleans, LA 70112 (e-mail: [email protected]).

R.D. and A.T. are on the Philips Speakers Bureau. The other authors declare no conflict of interest.

The authors in control of the study data include: M.I., J.M., and K.S.

Journal of Computer Assisted Tomography 47(3):p 390-395, 5/6 2023. | DOI: 10.1097/RCT.0000000000001434

Purpose 

Computed tomography (CT) coronary angiography performed on a detector-based spectral scanner helps more closely approximate severity of stenosis with nuclear medicine and cardiac catheterization tests compared with single-energy CT (SECT) in patients with an original CAD-RADS score of 3 and higher.

Methods 

This retrospective trial was conducted between January 2017 and December 2019 and included 52 patients with a CAD-RADS score of 3 and higher. Two reading sessions were performed 6 weeks apart. The first reading session was performed using only conventional images and the second reading session was performed using spectral results. Detector-based spectral CT CAD-RADS scores were compared with cardiac stress test and/or cardiac catheterization results for final characterization of stenosis in 41 segments from 32 patients. The mean CAD-RADS score was calculated for both the conventional images and spectral images.

Results 

The CAD-RADS score for SECT and the score for spectral CT for the 41 segments were compared. Available associated stress test and/or cardiac catheterization results were also compared with CAD-RADS scores. In 51% (21/41), a diagnosis concordant with best practices results was achieved with the help of spectral CT results. A mean CAD-RADS score of 3.56 was obtained using spectral results, compared with 3.93 using conventional images. A 2-tailed paired t test determined the difference to be significant with a P value of 0.007.

Conclusions 

Computed tomography coronary angiography is feasible on a detector-based spectral CT scanner and can improve diagnostic confidence over SECT angiography in patients with an original CAD-RADS score of 3 and higher.

Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.

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