The aim of the study was to determine the range of maxillary sinus volume and linear dimensions in adults, taking into account the gender and the side of the location using cone-beam computed tomography (CBCT) images.This study used the CBCT images of 136 patients (263 maxillary sinuses), who were presented to Minsk health facilities, with dental and maxillary sinus pathologies, aged over 20 years with no history of upper jaw surgery and with the presence of upper posterior teeth (from the first premolar to the second molar inclusive). The height, depth and width of the sinus weremeasured manually on CBCT scans. The maxillary sinus volume (V) was calculated by the formula: V = height × depth × 1/3 width.The volume of the maxillary sinus was varied from 5.53 to 24.03 cm3. The mean values of the sinus width, height and depth were 27.13 ± 3.83 mm, 35.83 ± 4.36 mm, and 38.98 ± 3.38 mm respectively.Despite a high variability of the maxillary sinus volume values, we did not find a statistically significant difference between the right and left sides in both males and females. The maxillary sinus linear dimensions and volume in females were statistically significantly less than in males.

The myocardial bridge (MB) is a congenital anomaly, in which a segment of a coronary artery courses through the myocardium. The aim of the study was to establish the location of myocardial bridges and the severity of atherosclerotic lesions of the coronary arteries in patients with coronary heart disease symptoms and in individuals who are the potential heart donors for transplantation. The data of the multislice computed tomography coronary angiography of the patients of the Republican Scientific and Practical Centre “Cardiology” from 2016 to 2018 were included in this study. 324 hearts of the deceased donors, which had not been used for orthotopic transplantation, were studied. According to the autopsy and the CT coronary angiography, the myocardial bridges were localized mainly in the left anterior descending artery of the left coronary artery (LCA). In 7.4 % of cases, MBs were found in a distal portion of the intermediate branch of LCA, in the left postero-lateral branch, in the right coronary artery, in the first diagonal artery, as well as along the obtuse marginal artery and the left circumflex coronary artery. In 36 % of cases, the identified bridges were considered as hemodynamically significant with regard to the length of the tunneled artery segment and its depth. Microscopic examination of the tunneled fragments of the coronary arteries in 4.9 % of cases showed the initial signs of damage of the vessel wall in the form of fibromuscular dysplasia and lipidosis. According to the CT coronary angiography results, no causal relationship has been established between the presence of MBs and atherosclerosis in the subepicardial segments of the coronary arteries.

Fossa navicularis magna was detected in multislice spiral computed  tomography in two patients who turned to the medical centers with  pathology of the paranasal sinuses. Its appearance is determined during  the development of the basilar part of the occipital bone and the body of the sphenoid bone in embryogenesis. This fossa has the  appearance of an edge defect on the ventral surface of the clivus in  CBCT scans. Practical radiologist should interpret such a finding as a  congenital anomaly of development, but not as an invasive lesion.

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