Aim: The aim of this study is to evaluate the relationship between nasal septum deviations, volumes of paranasal sinuses and Lund-Mackay scores related with the presence of rhinosinusitis in conebeam computed tomography images, which is currently been used in dental radiology. Material and method: CBCT images of 130 patients aged between 18 and 79 years with paranasal sinus area in our study were evaluated retrospectively. The correlation between the Lund-Mackay scores related with the presence of rhinosinusitis, the paranasal sinus volumes and nasal septum deviations which is an anatomic variation commonly seen in the community were examined. Results: Of the 130 patients who constituted the study group, 103 (79.2%) had nasal septum deviations, 53 (51.5%) to the right and 50 (48.5%) to the left. The total Lund-Mackay scores of individuals with nasal septum deviation were significantly higher than those without nasal septum deviation (p≤0.05). According to the results of our study, right and left maxillary, frontal, sphenoid and ethmoid sinus volumes were 13.6 cm³, 14.5 cm³, 6.2 cm³, 9.7 cm³, 8.7 cm³ respectively. Conclusion: As an alternative of Computed Tomography, which is accepted as gold standard to evaluate the relationship between nasal septum deviation and paranasal sinus volume with the presence of rhinosinusitis, Cone Beam Computerized Tomography, which allows a 3-dimensional radiological examination with a lower dose of radiation, may be used instead.