
Why most
#radiology evidences about the use of CT during COVID19 pandemics are not clinically impactful (1/3):

Radiology is just one aspect of patient management !

Selection bias +++

Blurry cohort description

Retrospective studies

Emergency setting data quality

Incomplete clinical, laboratory & followup data

Data mainly from
#China, with a high prevalence of
#COVID19 
CT scanning wasn’t performed for all patients

Heterogeneity of imaging pathways

CT scanning was performed at various time of infection lifecycle

Imaging findings described are similar to common seasonal viral infections (influenza) & non infectious disorders

Reference test (
#PCR) with unknown performances

No cyto-pathological data as reference standard
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