Pulmonary thromboembolism is a disease characterized by the obstruction of one or several branches of pulmonary arteries. A thrombus, an irregular blood clot, due to continuous blood flow moves away from the vertices and continues to move freely as an embolus. In 95% of cases, embolus from the deep veins of the thigh or pelvis causes pulmonary embolism. Clinical manifestation of thromboembolism has multiple non-specific signs and symptoms starting from chest pain, tachypnea and dyspnea, which may be prone to changes. Consequently, the presentation of this disease ranges from asymptomatic, accidentally discovered, to massive embolism that can end in immediate death. Computed tomography is used as the gold standard in the diagnosis of pulmonary embolism. This non-invasive method is characterized by high precision, wide availability and fast processing time. Using a water-soluble, low-osmolal contrast agent, an insight into lung vascularization is obtained,but also the possibility of detecting pathology other than pulmonary thromboembolism can be provided. In addition to computed tomography pulmonary angiogram (CTPA), which is mostly used in the diagnosis of pulmonary thromboembolism, perfusion and ventilation scintigraphy, MR angiography and direct pulmonary angiography are also available. Correct treatment should be initiated as early as possible in order to reduce the number of fatal outcomes. A retrospective study was performed which included patients who underwent CT pulmonary angiography in the period from January 1, 2020 to March 1, 2020 at the Clinical Department of Radiology, Clinical Hospital Center Rijeka, Sušak. Data used in this study were taken from the hospital information system ISSA. The aim of this study was to determine the incidence of pulmonary thromboembolism among respondents as well as the prevalence of patients with positive findings according to age and gender. The most important conclusions arising from this study indicate that the incidence of thromboembolia was slightly higher in women and that occurred most often among older respondents.