Clinical application of computer tomography in orbital volumes assessment in patients with various nosologies

Introduction. Due to the necessity of quantitative measurement and representation of orbital volumes for objective assessment of changes in their bone walls, the development of specialized image processing methods, in particular the usage of multispiral computed tomography (MSCT), is of great importance at present. This information enables the physician to choose patient’s treatment tactics, plan the course of surgical intervention and evaluate the results of the surgical treatment, which in turn improves the efficiency, quality of treatment and patients’ rehabilitation. Purpose. Demonstration of the clinical application of multislice computed tomography data for assessment of orbital volumes in patients with various pathological changes in the orbital bone walls to obtain additional diagnostic information and select treatment tactics. Materials and methods. From 2018 to 2024, CT data was processed at the Radiology Department No. 2 of the University Clinical Hospital № 1 of Sechenov University to quantitatively calculate orbital volumes in 201 patients (100%). Additionally, orbital volumes were calculated in 50 people without orbital pathology as a control group. MSCT was performed on the Aquilion One 640 (Canon, Japan) in volume mode with a slice thickness of 0.5 mm in the bone and soft tissue reconstruction mode; the Vitrea workstation and the standard Sculpt tool were used for subsequent calculation of orbital volumes. Results. Orbital volumes were calculated in 100% of patients. 147 patients (73%) out of 201 patients (100%) had posttraumatic changes of the orbital bone walls; orbital volume calculations in these cases were performed to determine individual wall parameters in order to plan the restoration of bone boundaries and replenishment of soft tissue deficiency; in 19 cases (9%) orbital wall deformations were combined with anophthalmic syndrome. In 11 patients (6%) with congenital anophthalmia, volume calculations were performed to quantify the degree of underdevelopment of the orbital bone walls. In 43 patients (21%), the technique was used after globe removal in order to plan further globe endoprosthetics. Conclusions. The technique of quantitative measuring of orbital volumes provided objective reliable data on changes of orbital bony boundaries within various nosologies, which made it possible to obtain additional diagnostic information about the patients’ condition and to implement a personalized approach to preoperative planning, which directly correlates with the quality of treatment and patients’ rehabilitation.

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