Table 3. PERCIST metabolic response group definitions.

PERCIST 1.0 Metabolic response
Progressive metabolic disease (PMD)	Increase of at least 30% in SULpeak and an absolute increase of 0.8SULpeak units or a new FDG avid lesion
Stable metabolic disease (SMD)	Response between PMR and PMD
Partial metabolic response (PMR)	Reduction of at least 30% in SUL peak and an absolute drop of at least 0.8 in SUL peak units
Complete metabolic response (CMR)	Complete resolution of FDG uptake within all lesions to a level less than or equal to mean liver activity

PERCIST = PET Response Criteria in solid Tumours