Orbital tumors are approximately 0,1% of all tumors, and they are 1/5 of all orbital diseases [1]. The average number of patients with orbital tumors is 110-120 per 1 000000 [2]. According to Weiqiang Tang (2013) the risk of postoperative complications are often directly associated with mistakes in diagnostic imaging [3]. The functional MSCT is new and promising noninvasive technique of oculomotor muscle’s movement visualization, it helps to assess structural and functional condition of oculomotor muscles in patients with orbital trauma [4]. The purpose of...

A total of 29 patients (100%) with orbital tumors were studied in Russian-Japanese center of Sechenov University. There were 14 women and 15 men, aged from 18 to 45 years. Dynamic 640-slice volume computed tomography was performed in all patients in resting state and with functional test, in soft tissue window. Functional test consisted of eye movement up, down, to the left and to the right for 6-8 seconds. All patients (n=29; 100%) undergone surgical treatment and were histologically proved. The aims of diagnostic fMSCT...

In 16 patients (55%) with oculomotor muscles tumors decreased contractility were revealed due to the muscle structure invasion by tumor, there were no limitations of optic nerve movement despite adjacent position of the nerve to the tumor (Fig. 1, Fig. 2). Limitations of optic nerve movement were revealed in 8 patients (28%) with nerve tumors, the globe movement and muscles contractility were unimpaired (Fig. 3, Fig. 4). In patients with small tumors of globe coats (n=4; 14%) there were no signs of movement limitations. In...

Functional MSCT in patients with orbital tumors provides additional diagnostic information about the globe, optical nerve and oculomotor muscles. This method allows revealing limitation of orbital structures movement and contractility as well as its relation to different tumors.

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