Salivary Scintigraphy Salivary gland scintigraphy will be carried out using sodium pertechnate 99mTc 04,before surgery,2-3 weeks after surgery and 6 months,12 months after radiation therapy to evaluate the morphology and function of the "transferred gland". This will be compared with the salivary gland morphology and function that will receive radiation treatment. After 148 MBq of 99mTc 04 is rapidly injected with computer acquisition of 1 min frames, for a total of 30 min. After 15 minutes time point, the patient is requested to suck on the juice of a lemon by a straw, in order to provoke salivary secretion.