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Multislice computed tomography evaluation of lateral orbital wall and sphenoid trigone in Turkey

DOI: 10.4328/JCAM.5881 Received: 08.06.2018 Accepted: 25.06.2018 Published Online: 02.07.2018 Printed: 01.03.2019 J Clin Anal Med 2019;10(2): 193-7 Corresponding Author: Hatice Kaplanoglu, Department of Radiology, Diskapi Yildirim Beyazit Training and Research Hospital, TR-06100 Ankara, Turkiye. T.: +90 3125084443 F.: +90 31231866 E-Mail: hatice.altnkaynak@yahoo.com.tr ORCID ID: 0000-0003-1874-8167 Abstract Aim: In this study, we aim to investigate the anterior-posterior length of the lateral orbital wall, and the width and thickness of the posterior base of the sphenoid trigone using multislice computed tomography (MSCT). Material and Method: The lateral orbital distance was found by measuring the distance that starts from the axial lateral orbital rim to the point where the lateral rectus muscle contacted the bone. The lateral wall width was measured at the superior border of the lateral rectus muscle. The sphenoid trigone thickness was measured at the level passing through the superior border of the lateral rectus muscle. Results: In the right eye, orbital lateral wall length was 21.6 mm, trigone thickness was 13.0 mm, and lateral wall width was 13.0 mm, while in the left eye, the orbital lateral wall length was 20.7 mm, trigone thickness was 9.5 mm, and the lateral wall width was 13.4 mm. Discussion: In this study we measured both the mean width and length of the larger part of the sphenoid, and the trigone thickness. These measurements can be used as an anatomical guide in the deep lateral orbital decompression surgery.