L'angioscanographie helicoidale 3D dans la caracterisation de la stenose carotidienne

Translated title of the contribution: 3D Helicoidal angioscanography to characterize carotid stenosis

G. Zöllner, J. L. Dietemann, N. Chakfe, M. Sadki, E. Gialis, R. Dragomir

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Angio-CT is a minimally invasive, useful diagnostic method for the evaluation of diseases of the carotid bifurcation. Necessary technical conditions are: spiral scans with a 2-3 mm/sec table speed, 2 mm beam collimation, 1 mm reconstruction and IV iodinated contrast material injected at 2.5 ml/sec. Information is provided by axial images, shaded surface display (SSD), multiplanar curved reformations and maximum intensity projection (MIP). Multiplanar curved reconstructions are particularly useful for CT-density plaque characterization. Angio-CT is multiplanar and allows characterization of plaques with respect to calcification, fatty content, fibrosis, ulceration, and size that cannot be obtained with conventional angiography. The assessment of CT-plaque density is quantitative but quantitative texture analysis of CT-angiographic defined plaques has still to be done and to be correlated with clinical risk. CT angiography can visualize angiographically defined ulcerations of more than 1 mm size, but fails to visualize fine (< 1 mm) intimal ruptures. Comparing low invasive methods, angio-MRI is very sensitive for the detection of fat, but has low sensitivity for calcifications (contrary to CT); with respect to a combination of Doppler and B-ultrasound, angio-CT has probably a lesser sensitivity for the identification of fresh thrombi, but shows the 3D-aspect of plaques. We need still more data on comparison between different imaging modalities with respect to plaque characterisation and associated risks, but angio-CT and ultrasound can be used in most cases for exploration of carotid bifurcation.

Translated title of the contribution3D Helicoidal angioscanography to characterize carotid stenosis
Original languageFrench
Pages (from-to)390-396
Number of pages7
JournalJournal d'Echographie et de Medecine par Ultrasons
Volume17
Issue number6
StatePublished - Dec 1996

Keywords

  • 3D reconstruction
  • MIP
  • atheroma
  • carotid artery
  • characterization
  • densitometry
  • helicoidal angioscanography
  • vascular calcifications

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of '3D Helicoidal angioscanography to characterize carotid stenosis'. Together they form a unique fingerprint.

Cite this