This invention relates to a method and a correction system for correcting tracer-uptake measurements for patient specific variations in the tracer-uptake. Input data are received about the patient and subsequently it is determining whether the received input data include tracer-impact data that impact the tracer-uptake measurements for the patient. In case the tracer-impact data are included in the input data a comparing is performed where the tracer-impact data are compared with pre-stored reference data that have associated thereto a correction indicator indicating an amount of deviation of the tracer-uptake measurement due to the tracer-uptake dependent data. The correction indicator of the pre-stored reference data that match with the tracer-impact data is then used to correct the tracer-uptake measurements for the patient.
