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European Radiology

, Volume 22, Issue 1, pp 129–137 | Cite as

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

  • Martin BeeresEmail author
  • Boris Schell
  • Aristidis Mastragelopoulos
  • Eva Herrmann
  • Josef Matthias Kerl
  • Tatjana Gruber-Rouh
  • Clara Lee
  • Petra Siebenhandl
  • Boris Bodelle
  • Stephan Zangos
  • Thomas J. Vogl
  • Volkmar Jacobi
  • Ralf W. Bauer
Computed Tomography

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).

Key Points

High-pitch CT angiography without ECG synchronisation can provide motion-free aortic imaging

High-pitch CTA could become the standard protocol before trans-catheter aortic valve implantation

Without ECG-gating, there is no need for special preparation of the patient

Keywords

CT angiography Aorta High-pitch Dual-source CT Radiation dose Motion artefacts 

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Copyright information

© European Society of Radiology 2011

Authors and Affiliations

  • Martin Beeres
    • 1
    Email author
  • Boris Schell
    • 1
  • Aristidis Mastragelopoulos
    • 1
  • Eva Herrmann
    • 2
  • Josef Matthias Kerl
    • 1
  • Tatjana Gruber-Rouh
    • 1
  • Clara Lee
    • 1
  • Petra Siebenhandl
    • 1
  • Boris Bodelle
    • 1
  • Stephan Zangos
    • 1
  • Thomas J. Vogl
    • 1
  • Volkmar Jacobi
    • 1
  • Ralf W. Bauer
    • 1
  1. 1.Department of Diagnostic and Interventional RadiologyClinic of the Goethe UniversityFrankfurtGermany
  2. 2.Department of BiostatisticsClinic of the Goethe UniversityFrankfurtGermany

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