Interpretation of CT Scan Findings During the COVID-۱۹ Pandemic

Studies have documented criteria for the prevention, diagnosis, and treatment of COVID-۱۹ pneumonia as more information has becomeavailable about its symptoms and complications. Similar to other coronavirus-induced cases of pneumonia, COVID-۱۹ pneumoniacauses acute respiratory problems. The chest CT scan, which is easily available in almost all areas, is a common imagingtechnique for diagnosing pneumonia. Its findings, which are accompanied by high speed, quality, and accuracy, allow the radiologistto easily identify affected areas of the lungs and to determine typical radiological features of patients with pneumonia causedby COVID-۱۹. These features include ground-glass opacity, multifocal patchy consolidation, and interstitial changes with the peripheraldistribution. The highest incidence occurs in the ۴th and ۵th lobes, where about ۵۰% to ۷۵% of the lesions observed. For infectedpatients, the CT scan protocol includes administration of HRCT technique in the inspiration phase with spiral ۴-slice devices andhigher. Scan parameters also include KV: ۱۰۰ - ۱۲۰, and mAs: ۲۰ - ۳۰, thickness = ۱ - ۲ mm, spiral, single breath-hold, and Pitch = ۰.۸ -۱.۵, which are determined for all patients. Since there are restrictions on using ionizing radiation for pregnant women, it is recommendedto initially conduct PCR tests. If necessary, typical radiography with an abdominal shield can be used for women in the firsttrimester of pregnancy, and the HRCT technique in low doses can be used for those in the second and third trimesters.

Keywords:

COVID-۱۹ , CT Scan , Typical Symptoms , Ground Glass , CT Scan Follow-Up