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Updated: Jul 3, 2025
Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
Published on: August 28, 2018
The Clear Value of Coronary Artery Calcification Evaluation on Non-Gated Chest Computed Tomography for Cardiac Risk
Roos A Groen1, J Wouter Jukema2,3, Paul R M van Dijkman1
1Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333ZA, Leiden, The Netherlands.
Insights
Coronary artery calcium (CAC) scoring on non-gated chest CT scans offers a valuable, radiation-free method for cardiovascular risk stratification. Integrating this readily available data into clinical practice can significantly improve patient management for coronary artery disease.
Area of Science:
- Cardiology
- Radiology
- Medical Imaging
Background:
- Coronary artery disease (CAD) risk stratification is crucial for patient management.
- Coronary artery calcium (CAC) assessment provides diagnostic and prognostic value.
- Current guidelines recommend CAC reporting on non-cardiac CT exams, but clinical application is limited.
Purpose of the Study:
- To review the clinical utility of various CAC assessment methods on non-gated chest CT.
- To highlight the underestimated value of non-gated CT scans for cardiac risk stratification.
- To discuss the integration of CAC assessment into routine cardiology practice.
Main Methods:
- Review of existing literature on CAC assessment in non-gated chest CT.
- Comparison of different visual CAC evaluation techniques.
- Discussion of diagnostic and prognostic implications of CAC on non-gated CT.
Main Results:
- Non-gated chest CT scans are an untapped resource for risk stratification.
- Visual CAC evaluation on non-gated CT is feasible and informative.
- CAC assessment on non-gated CT is radiation-free and cost-free.
Conclusions:
- The clinical utility of CAC assessed on non-gated chest CT is evident.
- Integration of CAC assessment into general cardiology practice should be promoted.
- Further research into non-gated CT-based CAC assessment is encouraged.
Abstract:
To enhance risk stratification in patients suspected of coronary artery disease, the assessment of coronary artery calcium (CAC) could be incorporated, especially when CAC can be readily assessed on previously performed non-gated chest computed tomography (CT). Guidelines recommend reporting on patients' extent of CAC on these non-cardiac directed exams and various studies have shown the diagnostic and prognostic value. However, this method is still little applied, and no current consensus exists in clinical practice. This review aims to point out the clinical utility of different kinds of CAC assessment on non-gated CTs. It demonstrates that these scans indeed represent a merely untapped and underestimated resource for risk stratification in patients with stable chest pain or an increased risk of cardiovascular events. To our knowledge, this is the first review to describe the clinical utility of different kinds of visual CAC evaluation on non-gated unenhanced chest CT. Various methods of CAC assessment on non-gated CT are discussed and compared in terms of diagnostic and prognostic value. Furthermore, the application of these non-gated CT scans in the general practice of cardiology is discussed. The clinical utility of coronary calcium assessed on non-gated chest CT, according to the current literature, is evident. This resource of information for cardiac risk stratification needs no specific requirements for scan protocol, and is radiation-free and cost-free. However, some gaps in research remain. In conclusion, the integration of CAC on non-gated chest CT in general cardiology should be promoted and research on this method should be encouraged.
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