open access
Assessment of intraorbital structure volume using a numerical segmentation image technique (NSI): the fatty tissue and the eyeball
open access
Abstract
Material and methods: A total of 45 patients (90 orbits) were included in the study. All the patients underwent MRI examination of the orbits by a 1.5 T scanner using a head coil. The degree of exophthalmos was determined clinically and radiologically in relation to the interzygomatic line. Quantitative assessment of the eyeball and fatty tissue was made using an NSI application.
Results: The influence of fatty tissue volume on the degree of exophthalmos was determined as being statistically significant (r = 0.367, p = 0.000374) but was smaller in comparison with the relationship between total eye muscle volume and degree of exophthalmos; eyeball volume was found to have the least influence (r = 0.344, p = 0.000374). Two eyeballs of significantly smaller volume were found in the group of 90 orbits analysed.
Conclusions: The NSI technique is a clinically useful application, providing objective data calculated individually for each orbit. A credible protocol for estimating the degree of exophthalmos on the basis of the NSI technique should include the eye muscle volume, fatty tissue volume and, in cases where eyeball pathologies coexist, the eyeball volume as well.
(Pol J Endocrinol 2007; 58 (4): 297-302)
Abstract
Material and methods: A total of 45 patients (90 orbits) were included in the study. All the patients underwent MRI examination of the orbits by a 1.5 T scanner using a head coil. The degree of exophthalmos was determined clinically and radiologically in relation to the interzygomatic line. Quantitative assessment of the eyeball and fatty tissue was made using an NSI application.
Results: The influence of fatty tissue volume on the degree of exophthalmos was determined as being statistically significant (r = 0.367, p = 0.000374) but was smaller in comparison with the relationship between total eye muscle volume and degree of exophthalmos; eyeball volume was found to have the least influence (r = 0.344, p = 0.000374). Two eyeballs of significantly smaller volume were found in the group of 90 orbits analysed.
Conclusions: The NSI technique is a clinically useful application, providing objective data calculated individually for each orbit. A credible protocol for estimating the degree of exophthalmos on the basis of the NSI technique should include the eye muscle volume, fatty tissue volume and, in cases where eyeball pathologies coexist, the eyeball volume as well.
(Pol J Endocrinol 2007; 58 (4): 297-302)
Keywords
exophthalmos; volume counting; orbital structures; computer applications
Title
Assessment of intraorbital structure volume using a numerical segmentation image technique (NSI): the fatty tissue and the eyeball
Journal
Issue
Article type
Original paper
Pages
297-302
Published online
2007-05-17
Page views
623
Article views/downloads
8681
Bibliographic record
Endokrynol Pol 2007;58(4):297-302.
Keywords
exophthalmos
volume counting
orbital structures
computer applications
Authors
Agata Majos
Piotr Grzelak
Wojciech Młynarczyk
Ludomir Stefańczyk