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High-pitch dual-source CT angiography of the whole aorta without ECG synchronisation: initial experience.

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Title: High-pitch dual-source CT angiography of the whole aorta without ECG synchronisation: initial experience.
Authors: Beeres M (AUTHOR), Schell B (AUTHOR), Mastragelopoulos A (AUTHOR), Herrmann E (AUTHOR), Kerl JM (AUTHOR), Gruber-Rouh T (AUTHOR), Lee C (AUTHOR), Siebenhandl P (AUTHOR), Bodelle B (AUTHOR), Zangos S (AUTHOR), Vogl TJ (AUTHOR), Jacobi V (AUTHOR), Bauer RW (AUTHOR), Beeres, Martin1 (AUTHOR), Schell, Boris (AUTHOR), Mastragelopoulos, Aristidis (AUTHOR), Herrmann, Eva (AUTHOR), Kerl, Josef Matthias (AUTHOR), Gruber-Rouh, Tatjana (AUTHOR), Lee, Clara (AUTHOR)
Source: European Radiology. Jan2012, Vol. 22 Issue 1, p129-137. 9p.
Abstract: Objective: To investigate the feasibility, image quality and radiation dose for high-pitch dual-source CT angiography (CTA) of the whole aorta without ECG synchronisation.Methods: Each group of 40 patients underwent CTA either on a 16-slice (group 1) or dual-source CT device with conventional single-source (group 2) or high-pitch mode with a pitch of 3.0 (group 3). The presence of motion or stair-step artefacts of the thoracic aorta was independently assessed by two readers.Results: Subjective and objective scoring of motion and artefacts were significantly reduced in the high-pitch examination protocol (p < 0.05). The imaging length was not significantly different, but the imaging time was significantly (p < 0.001) shorter in the high-pitch group (12.2 vs. 7.4 vs. 1.7 s for groups 1, 2 and 3). The ascending aorta and the coronary ostia were reliably evaluable in all patients of group 3 without motion artefacts as well.Conclusion: High-pitch dual-source CT angiography of the whole aorta is feasible in unselected patients. As a significant advantage over regular pitch protocols, motion-free imaging of the aorta is possible without ECG synchronisation. Thus, this CT mode bears potential to become a standard CT protocol before trans-catheter aortic valve implantation (TAVI). [ABSTRACT FROM AUTHOR]
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Abstract:<bold>Objective: </bold>To investigate the feasibility, image quality and radiation dose for high-pitch dual-source CT angiography (CTA) of the whole aorta without ECG synchronisation.<bold>Methods: </bold>Each group of 40 patients underwent CTA either on a 16-slice (group 1) or dual-source CT device with conventional single-source (group 2) or high-pitch mode with a pitch of 3.0 (group 3). The presence of motion or stair-step artefacts of the thoracic aorta was independently assessed by two readers.<bold>Results: </bold>Subjective and objective scoring of motion and artefacts were significantly reduced in the high-pitch examination protocol (p < 0.05). The imaging length was not significantly different, but the imaging time was significantly (p < 0.001) shorter in the high-pitch group (12.2 vs. 7.4 vs. 1.7 s for groups 1, 2 and 3). The ascending aorta and the coronary ostia were reliably evaluable in all patients of group 3 without motion artefacts as well.<bold>Conclusion: </bold>High-pitch dual-source CT angiography of the whole aorta is feasible in unselected patients. As a significant advantage over regular pitch protocols, motion-free imaging of the aorta is possible without ECG synchronisation. Thus, this CT mode bears potential to become a standard CT protocol before trans-catheter aortic valve implantation (TAVI). [ABSTRACT FROM AUTHOR]
ISSN:09387994
DOI:10.1007/s00330-011-2257-5