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A CT scan for COVID merits a word of caution Updated: Updated: May 06, 2021 01:48 IST Going by data and the risk factors, its widespread use in diagnosing the infectious disease needs to be questioned Share Article AAA Going by data and the risk factors, its widespread use in diagnosing the infectious disease needs to be questioned There are broadly three reasons why we perform tests in clinical medicine: diagnosis (what is the disease?), etiognosis (what caused a disease?), and prognosis (how will the disease evolve?). It is also important that the outcome of a test should guide treatment in some way, especially when it is being touted as being a monitoring test that provides unique information that cannot be obtained by easier means. Considering how widespread the use of computerised tomography (CT) scans of the thorax during the novel coronavirus pandemic has been, one would assume that the test would satisfy one, if not all the above criteria, for an accurate diagnostic t

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