<qa>  What is the first study using 18-F-fluoroacetate sodium?18-F-fluoroacetate sodium is designed to be attracted to cells that grow in some tumors. This imaging solution has a small dose of radiation added to it, which may help the doctor to see cancer cells and their possible spread through the body, during the scans. This is the first study using 18-F-fluoroacetate sodium in humans. 