PERCIST
Also written as: PERCIST — PET Response Criteria in Solid Tumors
Standardized criteria for assessing tumor response to therapy using quantitative PET imaging measurements.
Full Definition
PET Response Criteria in Solid Tumors (PERCIST) provides standardized methodology for evaluating treatment response using quantitative positron emission tomography measurements. PERCIST criteria focus on changes in SUL peak (lean body mass-corrected SUV) in the most metabolically active tumor lesions, defining complete metabolic response, partial metabolic response, stable metabolic disease, and progressive metabolic disease. Unlike anatomic response criteria, PERCIST can detect metabolic changes that precede morphologic changes, potentially providing earlier indicators of treatment efficacy. The system requires rigorous quality control and standardized PET acquisition protocols.
Usage
Usage note: Capitalize as acronym; distinguish from morphologic response criteria like RECIST
In Context
- "PERCIST evaluation demonstrated partial metabolic response with 45% reduction in SUL peak." — Response assessment report
- "The study protocol specified PERCIST criteria for PET-based response determination." — Clinical trial documentation