From: Deauville score versus ratio Deauville score in the interpretation of interim 18F-FDG PET-CT and in prediction of outcome in children with FDG-avid extra-nodal lymphomas
Criterion 1
No uptake
Criterion 2
Uptake ≤ mediastinum
Criterion 3
Uptake > mediastinum but ≤ liver
Criterion 4
Uptake moderately more than liver uptake, at any site
Criterion 5
Markedly increased uptake at any site and new sites of disease