Table 2.

CO-RADS scale and its correlation with BSTI and RSNA for the diagnosis of COVID-19

CO-RADS	BSTI	RSNA
CO-RADS 0: non-interpretable	Non-interpretable	Non-interpretable
CO-RADS 1: normal/no infection	Negative for pneumonia	No COVID
CO-RADS 2: pattern consistent with other infections	Atypical pattern. Not reported for COVID-19	-
CO-RADS 3: compatible with COVID-19 but present in other diseases	Indeterminate. Not COVID-19 specific	Indeterminate
CO-RADS 4: suspicious of COVID-19	-	Probable COVID
CO-RADS 5: typical pattern of COVID-19	Typical characteristics	Classic COVID
CO-RADS 6: confirmed COVID-19 diagnosis with RT-PCR	-	-

BSTI: the BSTI statement guideline; RSNA: the RSNA expert consensus statement category; -: no correspondence in this scale