Orbital volume assessment according to MSCT data in patients with midface trauma

Purpose. To acquire additional diagnostic information in patients with orbital trau-ma in order to identify the risk of postoperative enophthalmos. To evaluate the ad-vantages of MSCT data postprocessing and volume orbital measurement. Materials and methods. A total of 71 patients (100%) with midface trauma were studied in Sechenov University using pre- and postoperative volume 640-slice CT. Post pro-cessing of MSCT data included workstation special software, where the bone borders of the orbits before and after surgical treatment were marked on every slice and presented in mathematical units (ml). Results. Preoperative MSCT revealed increased orbital volume in 64 patients (90%) due to severe midface trauma, the difference between traumatized and normal orbit was from 2 ml to 14 ml, these patients required surgical treatment. The other 7 patients (10%) had mild midface trauma, the difference between orbital volumes was less than 2 ml, these patients didn't undergo surgical treatment. After the operation in 55 patients (77%) the orbital volume was reconstructed - the differ-ence between orbital volumes was not more than 2 ml. In 9 cases (13%) orbital volume dif-ference was more than 2 ml which means that these patients still had risk of postoperative enophthalmos and required additional diagnostic control and potential surgical correction. Conclusion. Postprocessing of the MSCT data gave the possibility to calculate pre-and postoperative orbital volume changes and present it in mathematical units (ml) in 3D mode. As the result the additional information can be acquired in order to identify the risk of postoperative enophthalmos. © 2018 Russian Electronic Journal of Radiology. All rights reserved.