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Value of dual-energy CT angiography in patients with treated intracranial aneurysms

  • Iulia Mocanu
  • Morgane Van Wettere
  • Julie Absil
  • Michaël Bruneau
  • Boris Lubicz
  • Niloufar Sadeghi
Diagnostic Neuroradiology
  • 57 Downloads

Abstract

Purpose

To evaluate the ability of dual-energy CT angiography (DECTA) in metal artifact reduction in patients with treated intracranial aneurysms by comparing DECTA-based virtual monoenergetic extrapolations (VMEs) and mixed images (MI).

Methods

Thirty-five patients underwent prospectively a dual-source DECTA (Somatom Force, Siemens Medical Solutions, Forchheim, Germany) after aneurysm repair. A total number of 40 aneurysms (23 treated by coil embolization and 17 treated by surgical clipping) were analyzed. Mixed images (equivalent to a conventional single-energy CT angiography) were compared to VMEs at 75, 95, and 115 keV. Artifact severity was assessed quantitatively by measuring the mean attenuation value and standard deviation within regions of interest placed in the most hypodense coil or clip artifact area. Artifact severity score and contrast vessel score were also assessed qualitatively by two independent blinded readers.

Results

In those aneurysms treated by surgical clipping, quantitative and qualitative analyses showed significant reduction of artifacts on VMEs compared to MI with the best compromise being obtained at 95 keV in order to keep an optimal vessel contrast in the adjacent vessel. In those aneurysms treated by coil embolization, there was no significant reduction of artifacts both on quantitative and qualitative analyses.

Conclusion

Dual-source DECTA was helpful in order to reduce clip artifacts on VMEs with the optimal adjacent vessel visualization obtained at 95 keV, whereas this technique was not helpful in aneurysms treated by coiling.

Keywords

Dual-energy CT Aneurysm Coil embolization Surgical clipping Metallic artifacts 

Notes

Compliance with ethical standards

Funding

No funding was received for this study.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Iulia Mocanu
    • 1
  • Morgane Van Wettere
    • 1
  • Julie Absil
    • 1
  • Michaël Bruneau
    • 2
  • Boris Lubicz
    • 3
  • Niloufar Sadeghi
    • 1
  1. 1.Department of RadiologyErasme Hospital-ULBBrusselsBelgium
  2. 2.Department of NeurosurgeryErasme Hospital-ULBBrusselsBelgium
  3. 3.Department of Interventional NeuroradiologyErasme Hospital-ULBBrusselsBelgium

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