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Measurement of orbital volume by a 3-dimensional software program: an experimental study
M Deveci1, S Oztürk, M Sengezer
1Department of Plastic and Reconstructive Surgery, Gülhane Military Medical Academy, Ankara, Turkey. mdeveci98@yahoo.com
Purpose:
This study reports a simple method with high accuracy for determining orbital volume from computed tomography (CT) scans.
Materials And Methods:
The volume of 20 orbits was evaluated in 20 dry skulls by use of a 3-dimensional software program in General Electric High-Speed Advantage CT/I (Milwaukee, WI), and compared with the volume obtained by direct measurement using the water displacement method. Accuracy of volume measurement by this software program was assessed statistically by paired samples t-test.
Results:
The mean volume was found to be 28.37 mL +/- 2.15 by direct impression and 28.41 mL +/- 2.09 by the software program. Volume difference between the 2 methods averaged 0.93 +/- 1.08 mL for each orbit (P < .01). The correlation between the techniques was found to be high (r = 0.887, P < .01). There was no significant volume discrepancy between the 2 methods.
Conclusion:
Measurement by the technique described is an easy and accurate method of assessing the volume of the orbit.