At the beginning of the outbreak of COVID19, positive RT-PCR result was recognized as the only standard to diagnose covid19 by the Chinese government with which patients were allowed to be admitted into hospitals for treatment. However, it was widely criticized for the lack of testing kit, time-consuming pending result and high false negative rate up to 42%-71%. Many patients` conditions were considerably deteriorated before they got their testing result, some cannot make it before they even had a chance to get the RT-PCR test.
In early February, with CT chest scan strongly recommended by many frontline radiologists, such as Dr Zhang xiaochun, who had been fighting at the very frontline in Wuhan since the outbreak of COVID19, CT chest scan with typical pneumonia imaging patterns was officially added as the alternative standard to diagnose COVID19.
Compared to RT-PCR test, especially with the swab test, CT is far more sensitively, estimated three times higher than RT-PCR, which allows the detection of those with light symptoms and further facilitates to improve quarantine measures.
Therefore, it is universally agreed in China that CT played a key role in fighting against COVID-19 so that the epidemic in China can be promptly and effectively controlled.
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CT chest scan is considered to significantly contribute to China`s low mortality of COVID-19
2020 05/26

