Table 2.

Potential COVID-19 patterns seen on CT component of ¹⁸FDG-PET/CT

Pattern	Description
Typical COVID-19	Mid and lower zone predominant, peripheral predominant GGO Multifocal consolidation ≥2 lobes Crazy paving Reverse halo/ Attoll sign
Probable COVID-19	Mid and lower zone predominant bronchocentric consolidation Minimal GGO
Indeterminate COVID-19	Typical or probable pattern but with unilateral or upper zone predominance Does not fit non-Covid-19 pattern
Alternative pathology to COVID-19	Cavitation Unifocal lobar pneumonia Effusions Tree-in-bud pattern Mass-like consolidation

¹⁸FDG-PET, 18-fludeoxyglucose-positron emmision tomography; GGO, ground glass opacity..