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


Goetti, R; Feuchtner, G; Stolzmann, P; Desbiolles, L; Fischer, M A; Karlo, C; Baumueller, S; Scheffel, H; Alkadhi, H; Leschka, S (2010). High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates. European Radiology, 20(11):2565-2571.

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 (kappa = 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.

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 (kappa = 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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27 citations in Web of Science®
32 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Diagnostic and Interventional Radiology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2010
Deposited On:15 Jul 2010 08:49
Last Modified:05 Apr 2016 14:11
Publisher:Springer
ISSN:0938-7994
Publisher DOI:https://doi.org/10.1007/s00330-010-1838-z
PubMed ID:20585785

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