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Table 1 Overview of CO-RADS categories

From: COVID-19 pneumonia: a pictorial review of CT findings and differential diagnosis

CO-RADS category

Level of suspicion for pulmonary involvement of COVID-19

CT findings

0

Uninterpretable

Technically insufficient CT scan

1

Very low

Normal or non-infectious

2

Low

Consistent with other infection rather than COVID-19

3

Indeterminate

Unclear whether COVID-19 is present

4

High

Suspicious for COVID-19

5

Very high

Typical for COVID-19

6

Proven case

Positive RT-PCR for COVID-19