Background: As COVID-19 declared pandemic by WHO, early diagnosis and treatment of COVID-19 is essential. COVID Antigen and RTPCR tests are commonly done to make this diagnosis. Currently we are using RT-PCR for diagnosis of COVID-19 and sensitivity of the test is 60-70% but CT has high sensitivity towards identification in early phase of disease and it also correlates with severity of disease. In view of that our aim of study is role of HRCT thorax in COVID-19 irrespective of COVID-19 RTPCR status. Methodology: This was a Randomized Retrospective observational study conducted in SANTOSH hospital Ghaziabad, from march 2020 to November 2020. 25 subjects were included after detailed history, physical examination, relevant routine investigations, Chest X-RAY, CT chest , COVID-19 RTPCR, inclusion and exclusion criteria who were divided into two age groups. Then they were assessed for co-relation between CT severity score and severity of symptoms, co-morbidities, and age. Results: The diagnosis of COVID 19 is mainly done by COVID antigen and RT-PCR. CT has high sensitivity as compared to RT-PCR in early diagnosis of COVID 19. CT scoring is highly correlated with the severity of the patient’s symptoms, age and co-morbidities. we found that individuals with older age and co-morbidities are more likely to be getting infected with COVID-19 and most of them had DM as the comorbidity. Conclusion: CT has high sensitivity as compared to RT-PCR in early diagnosis of COVID 19. Our study showed that CT scan was advised to all the patients and we found that there is an evidence of COVID 19 like pneumonia and all the patients became positive on subsequent RT-PCR repetitions. Nonetheless, our findings reinforce the need for repeated testing in patients with suspicion of SARS-Cov-2 infection on CT Scan.
