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European Radiology
Published in: European Radiology 11/2010

01-11-2010 | Cardiac

High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates

Authors: Robert Goetti, Gudrun Feuchtner, Paul Stolzmann, Lotus Desbiolles, Michael Alexander Fischer, Christoph Karlo, Stephan Baumueller, Hans Scheffel, Hatem Alkadhi, Sebastian Leschka

Published in: European Radiology | Issue 11/2010

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Abstract

Objective

To assess the effect of systolic data acquisition for electrocardiography (ECG)-triggered high-pitch computed tomography (CT) on motion artefacts of coronary arteries in patients with high heart rates (HRs).

Methods

Eighty consecutive patients (15 women, age 67 ± 14 years) with HR ≥70 bpm underwent CT angiography of the thoracic aorta (CTA) on 128-slice dual-source CT in ECG-triggered high-pitch acquisition mode (pitch = 3.2) set at 60% (group A, n = 40) or 30% (group B, n = 40) of the RR interval. Two blinded readers graded coronary artery image quality on a three-point scale. Radiation doses were calculated.

Results

Inter-observer agreement in grading image quality of the 1,154 coronary segments was good (κ = 0.62). HRs were similar in groups A and B (85 ± 13 bpm vs 85 ± 14 bpm, p not significant). Significantly fewer coronary segments with non-diagnostic image quality occurred (i.e. score 3) in group B than in group A [2.8% (16/579) vs 8.3% (48/575), p < 0.001]. Seventeen patients (42.5%) of group A and 12 patients (30.0%) of group B had at least one non-diagnostic segment. Effective radiation doses were 2.3 ± 0.3 mSv for chest CTA.

Conclusion

A systolic acquisition window for high-pitch dual-source CTA in patients with high HRs (≥70 bpm) significantly improves coronary artery image quality at a low radiation dose.
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Metadata
Title
High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates
Authors
Robert Goetti
Gudrun Feuchtner
Paul Stolzmann
Lotus Desbiolles
Michael Alexander Fischer
Christoph Karlo
Stephan Baumueller
Hans Scheffel
Hatem Alkadhi
Sebastian Leschka
Publication date
01-11-2010
Publisher
Springer-Verlag
Published in
European Radiology / Issue 11/2010
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-010-1838-z

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