The Radiochemistry Unit houses approximately 40 researchers and 7 research groups. Prof. Gareth Law is the Unit Head and is responsible for general radiochemistry activities and teaching. Prof. Anu Airaksinen is responsible for radiopharmaceutical chemistry activities and teaching. The research group PIs are (in alphabetical order): Prof Anu Airaksinen; Dr Kerttuli Helariutta; Dr Pirkko Hölttä; Dr Risto Koivula; Prof. Gareth Law; Dr Merja Lusa; Dr Susanna Salminen-Paatero; Dr Mirkka Sarparanta; and Dr Marja Siitari-Kauppi.