Preview

Medical Visualization

Advanced search

A new Anatomical Landmark for Morphometric Studies in Ophthalmology by using Spiral Computed Tomography

Abstract

Aim: to develop an easy-to-use, accurate and reliable method for measurement of eyeballs’ protrusion in patients with facial scull asymmetry by using computered tomography (computered exophthalmometry) and compare its potential with Hertel’s exophthalmometry. Materials and methods. The retrospective study of computerized axial tomography scans and ambulatory medical records of 30 patients (43 computer axial tomography scans of 60 orbits) with various deformations of orbital area. The scans were evaluated with personal computer and RadiAnt DICOM Viewer software. With tools of the software we drew a straight line through the apices of styloid processeses of temporal bone. This line served as a reference line for all further measurements. On the image, where the cornea of the first eyeball was the most prominent, we constructed a perpendicular to the most prominent point of the cornea. In the same way, the distance from the most prominent point of cornea to the reference line was measured for the second eye. The difference between the lengths of two perpendiculars corresponded to the difference of protrusion between two eyes (exophthalmos or enophthalmos). The data of computer exophthalmometry were compared with the results obtained with Hertel’s exophthalmometer specified in the ambulatory medical records. Results. All 43 computer axial tomography scans were evaluated in this way of computer exophthalmometry. In patients with intact lateral walls of the orbits the differences of protrusion between two eyes measured with two methods were similar. In contrary to the Hertel’s exophthalmometer, the computer exophthalmometry showed reliable results in patients with trauma of lateral orbital walls. Conclusions. The developed method of computered tomography is easy-to-use and allow getting accurate and reliable data. It can be applied to preoperative diagnostics, planning and evaluation of treatment outcome in patients with different abnormalities of orbital area, in contrary to the Hertel’s exophthalmometer.

About the Authors

Daria Sergeevna Afanasyeva
S. Feodorov Eye Microsurgery State Institution
Russian Federation


Marina Borisovna Gushchina
S. Feodorov Eye Microsurgery State Institution
Russian Federation


Sergey Anatolevich Borzenok
S. Feodorov Eye Microsurgery State Institution
Russian Federation


References

1. Athanasinov P.A., Prabhakaran V.C., Selva D. Nontraumatic enophthalmos: a review. Acta Ophthalmologica. 2008; 86: 356-364.

2. Tengroth B.A comparison between the measurements from Hertel’s exophthalmometer and a new radiophotographic method, on an exophthalmic population. Acta Ophthalmologica. 1964; 42: 855-858.

3. Silva D. Orbital tumors. Am. J. Ophthalmol. 1968; 65: 318-339.

4. Whitehouse R.W., Batterbury M., Jackson A., Noble J.L. Prediction of enophthalmos by computed tomography after 'blow out' orbital fracture. Br. J. Ophthalmol. 1994; 78: 618-620.

5. Омарова С.М. Возрастные особенности строения и семиотика первичных опухолей орбиты у детей и подростков по данным компьютерной томографии: Автореф. дис. ... канд. мед. наук. М., 2009. 26 c.

6. Чепурина А.А., Свириденко Н.Ю., Ремизов О.В. и др. Клинико-томографические взаимоотношения при диплопии у пациентов с эндокринной офтальмопатией и болезнью Грейвса. Клиническая и экспериментальная тиреоидология. 2012; 8 (1): 40-45.

7. Tengroth B., Bogren H., Zackrisson U. Human exophthalmometry. Acta Ophthalmologica. 1964; 42: 864-874.


Review

For citations:


Afanasyeva D.S., Gushchina M.B., Borzenok S.A. A new Anatomical Landmark for Morphometric Studies in Ophthalmology by using Spiral Computed Tomography. Medical Visualization. 2016;(4):19-24. (In Russ.)

Views: 1093


ISSN 1607-0763 (Print)
ISSN 2408-9516 (Online)