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European Radiology
Published in: European Radiology 1/2009

01-01-2009 | Vascular-Interventional

Assessment of thoracic aortic conformational changes by four-dimensional computed tomography angiography in patients with chronic aortic dissection type b

Authors: Tim F. Weber, Maria-Katharina Ganten, Dittmar Böckler, Philipp Geisbüsch, Annette Kopp-Schneider, Hans-Ulrich Kauczor, Hendrik von Tengg-Kobligk

Published in: European Radiology | Issue 1/2009

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Abstract

To characterize the heartbeat-related distension of dissected and non-dissected thoracic aortic segments in chronic aortic dissection type b (CADB) ECG-gated computed tomography angiography was performed in ten CADB patients. For 20 time points of the R–R interval, multiplanar reformations were taken at non-dissected (A, B) and dissected (C) aorta: ascending aorta (A), aortic vertex (B), 10 cm distal to left subclavian (Ct, true channel; Cf, false channel). Relative amplitudes of aortic area and major and minor axis diameter changes were quantified. Area amplitudes were 12.9 ± 3.7%, 11.4 ± 1.8%, 16.5 ± 5.9% and 10.5 ± 5.7% at A, B, Ct and Cf, respectively. Area amplitudes were significantly greater at Ct than at Cf and B (p < 0.05). Major axis diameter amplitudes were 7.7 ± 1.9%, 6.2 ± 1.3%, 5.9 ± 2.0% and 6.1 ± 3.6% at A, B, Ct and Cf, respectively. There were no differences in major axis diameter amplitudes. Minor axis diameter amplitudes were 6.7 ± 2.1%, 8.4 ± 1.9%, 12.7 ± 6.3% and 6.0 ± 2.2% at A, B, Ct and Cf, respectively. Minor axis diameter amplitudes were significantly the greatest at Ct (p < 0.05). In CADB, the heartbeat-related distension of aortic area and diameter is evenly distributed over the non-dissected aortic arch. As a result from different blood flow properties, there are significantly greater conformational changes in the true channel of the dissected aorta.
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Metadata
Title
Assessment of thoracic aortic conformational changes by four-dimensional computed tomography angiography in patients with chronic aortic dissection type b
Authors
Tim F. Weber
Maria-Katharina Ganten
Dittmar Böckler
Philipp Geisbüsch
Annette Kopp-Schneider
Hans-Ulrich Kauczor
Hendrik von Tengg-Kobligk
Publication date
01-01-2009
Publisher
Springer-Verlag
Published in
European Radiology / Issue 1/2009
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-008-1103-x

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