Tumor Kinase Inhibitor Concentrations Measured by PET

The investigators hypothesize that response to kinase inhibitors is dependent on achieving pharmacological active drug levels in tumor tissue and that quantitative PET imaging can predict kinase inhibitors tumor concentrations. The ultimate aim is to develop a quantitative PET based imaging tool to differentiate between patients who will respond to therapy with kinase inhibitors. The main objective of this study is to determine whether tumor concentrations of kinase inhibitors at pharmacological active doses can be predicted from PET studies using tracer amounts (microdosing) of corresponding radiolabeled kinase inhibitors. This objective includes the development and validation of pharmacokinetic models for radiolabeled kinase inhibitors as well as validation of the microdosing concept for kinase inhibitors.