MET and neoplasm: The measured tumor uptake was significantly higher for H1975 mice than H520; in particular, the one of 11C‐SU11274 in c‐Met positive animal model reached its maximum at 80 min postinjection and was constantly higher than the c‐Met negative animal, confirming the usefulness of 11C‐SU11274 as a radioactive tracer for detection of the activation of c‐Met by PET imaging.