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