The COVID-19 pandemic broke out in December 2019 in the Chinese province of Wuhan with the manifestation of unexplained pneumonia. Globally, 12th of April 2023, there have been 762,791,152 confirmed cases of COVID-19, including 6,897,025 deaths, reported to WHO. A later established consequence that lags behind in some patients with COVID-19 is the post-COVID syndrome (PCS). Post-COVID syndrome is a associated with the severity of the clinical picture of acute COVID-19. Older age, male gender and existing comorbidities are associated with the onset of post-COVID syndrome. The gold standard for the diagnosis of post-COVID syndrome is chest computed tomography (CT), although a chest X-ray is recommended and performed as a pre-emptive CT scan. The most common radiological abnormalities reported in the literature are residual pneumonia, organizing pneumonia (OP), post-DOVID intersticial lung disease (PC-ILD), ground glass opacity (GGO), linear banded opacities, and bronchiectasis and/or fibrotic changes. The diagnoses of pulmonary embolism (PTE) and pneumothorax are correlated with the post-COVID syndrome and the severity of the clinical picture of COVID-19. Although the exact mechanisms and the association of COVID-19 with PTE and pneumothorax have not been established, significant increases in the number of patients with these diagnoses have been observed, who previously had a more severe clinical picture of COVID-19 or developed post-COVID syndrome. Through our research, we have confirmed that the frequency of older age is one of the main predictors for the development of post-COVID syndrome and associated radiological abnormalities, which agrees with the existing literature. We were also able to prove the most frequent presence of linear band shadows in as many as 48% of subjects as a radiological abnormality verified by CT, which also agrees with the statements from the existing literature. PTE as a complication of COVID-19 was observed in 22% of respondents and is considered a rare complication. Pneumothorax is a very rare but often fatal complication of complications associated with post-COVID syndrome and occurs in only 1-2% of cases. Education of healthcare workers and understanding of the symptoms and clinical picture of post-COVID syndrome is extremely important in the fight against this new, unexplored disease.