Actualité

Images stéréoscopiques à partir d'angiogrammes de tomodensitométrie

  • Santé-Sciences-Technologie,
  • Santé-social,
Date(s)

le 31 mai 2019

Publié dans World Neurosurg

Projet de recherche collaborative dirigé par le Prof. I.L. Maldonado

Stereoscopic images from computed tomography angiograms

Abstract

Objective - To present an adaptation of the anaglyph photography technique to be used with radiological images from computed tomography angiograms, enabling stereoscopic visualization of the patient's individual abnormal vascular anatomy for teaching, case discussion, or surgical planning purposes.

Methods - Traditional anaglyph procedures with actual objects yield two independent photographs, simulating the image perceived by each eye. Production of anaglyphs from angiograms involve three basic procedures: volume rendering, image capture, and image fusion. Volume renderings were reconstructed using a free, open-source DICOM (Digital Imaging and Communications in Medicine) reader. Subsequently, the virtual object was positioned to mimic the operator's angle of view, and different perspectives of the reconstructed volume could be obtained through exclusively horizontal rotation. The two images were then fused after their color composition has been modified so that each eye would perceive only one image when using anaglyph glasses.

Results - Forty-three angiograms were reviewed for the purpose of this study and a total of six examinations were selected for illustration of the technique. Stereoscopic display was possible for all of them and in the three types of support tested: computer monitor, tablet, and smartphone screens.

Conclusion - Anaglyph display of computed tomography angiograms is an effective and low-cost alternative for the stereoscopic visualization of a patient's individual intracranial vascular anatomy.

Copyright © 2019. Published by Elsevier Inc.

Keywords

#cerebrovascular disorders; circle of #Willis; computed #tomography #angiography; computer-assisted three-dimensional #imaging; internal carotid artery; middle cerebral #artery; #neuroanatomy; #stereoscopic vision; three-dimensional image; #tomography

Contact :
Prof. Igor Lima Maldonado :