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Nasolacrimal system aeration on computed tomographic imaging: effects of patient positioning and scan orientation

Authors Czyz C, Bacon T, Stacey A, Cahill E, Costin B, Karanfilov B, Cahill K

Received 11 January 2015

Accepted for publication 13 February 2015

Published 11 March 2015 Volume 2015:9 Pages 469—473


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 5

Editor who approved publication: Dr Scott Fraser

Craig N Czyz,1 Thomas S Bacon,2 Andrew W Stacey,3 Eva N Cahill,4 Bryan R Costin,5 Boris I Karanfilov,6 Kenneth V Cahill5

1Section Oculofacial Plastic and Reconstructive Surgery, Ohio University/OhioHealth, 2Department of Medical Education, Mount Carmel Health Systems, Columbus, OH, USA; 3Department of Ophthalmology, University of Michigan, Ann Arbor, MI, USA; 4Department of Biology, Wittenberg University, Springfield, OH, USA; 5Department of Ophthalmology, William H Havener Eye Institute, Ohio State University Wexner Medical Center, Columbus, OH, USA; 6The Sinus Institute of Ohio, Dublin, OH, USA

Purpose: To determine the impact of patient positioning and scan orientation on the appearance of air in the nasolacrimal drainage system on computed tomography (CT) imaging, and the repeatability of the observations.
Methods: This was a retrospective analysis of CT images for 92 patients.
Results: Air was found to be present more fully in the upright-position group as compared with the supine-position group. Comparing axial and coronal scan orientation, no difference in aeration was found, except for the nasolacrimal duct in the upright-position group.
Conclusion: Patient position should be accounted for in diagnostic conclusions and treatment decisions based on CT.

Keywords: axial, coronal, nasolacrimal sac, nasolacrimal duct

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