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European Radiology
Published in: European Radiology 8/2013

01-08-2013 | Cardiac

Quantification and characterisation of coronary artery plaque volume and adverse plaque features by coronary computed tomographic angiography: a direct comparison to intravascular ultrasound

Authors: Ryo Nakazato, Aryeh Shalev, Joon-Hyung Doh, Bon-Kwon Koo, Damini Dey, Daniel S. Berman, James K. Min

Published in: European Radiology | Issue 8/2013

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Abstract

Objective

We evaluated the performance of manual measures of coronary plaque volumes and atherosclerotic plaque features from coronary CT angiography (CTA), using intravascular ultrasound (IVUS) as the reference.

Methods

Thirty individual coronary plaques with suitable fiduciary markers were identified. Plaque volumes on coronary CTA were manually quantified by two observers and compared to IVUS plaque volumes as interpreted by an independent laboratory. The presence of adverse plaque characteristics—low attenuation plaque (LAP), positive remodelling (PR) and spotty calcification (SC)—on coronary CTA was evaluated and compared to IVUS.

Results

High correlation in plaque volumes was detected between observers (r = 0.94, P < 0.0001; 95 % limits of agreement <48.7 mm3, bias 6.6 mm3). Excellent correlation (r = 0.95, P < 0.0001) was noted in plaque volume between independent observers and IVUS (95 % limits of agreement <40.6 mm3, bias −4.4 mm3) and did not differ from IVUS (105.0 ± 56.7 vs. 109.4 ± 60.7 mm3, P = 0.2). The frequency of LAP (10 % vs. 17 %), PR (7 % vs. 10 %) and SC (27 % vs. 33 %) was similar between coronary CTA and IVUS (all P = NS).

Conclusions

Plaque volume on coronary CTA determined by manual methods demonstrates high correlation and modest agreement to IVUS. Further, coronary CTA demonstrates high accuracy for the identification of adverse plaque characteristics, including LAP, PR and SC.

Key Points

• Coronary CT angiography is a non-invasive test that enables coronary plaque assessment
• Plaque quantification by coronary CT angiography correlates well with intravascular ultrasound findings
• Coronary CT angiography can identify adverse plaque characteristics
Appendix
Available only for authorised users
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Metadata
Title
Quantification and characterisation of coronary artery plaque volume and adverse plaque features by coronary computed tomographic angiography: a direct comparison to intravascular ultrasound
Authors
Ryo Nakazato
Aryeh Shalev
Joon-Hyung Doh
Bon-Kwon Koo
Damini Dey
Daniel S. Berman
James K. Min
Publication date
01-08-2013
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 8/2013
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-013-2822-1

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