Correlation Between Ct Findings And Outcomes In 46 Patients With Coronavirus Disease 19 Scientific Reports In the study performed by Dinga et al , in the early stage of symptomatic COVID19 (0–4 days), 212% of the CT scans showed no abnormalities In case of CT abnormalities, peripheral GGO was the most important imaging manifestation (765%), indicating the disease may mainly invade the terminal respiratory bronchi or alveoli at first Globally, medical guidelines determine that a CT value below the number 35 means a person is COVID positive A CT value of 35 and above qualifies as a negative report The ICMR states that the globally accepted cutoff for CT value for Covid19 ranges from 3540 depending upon the instructions laid down by individual manufacturers 9/25 ct scan covid