Experimental studies in mice have revealed that high quantities of incorporated radioisotopes (131I, 85Sr, 89Sr, 90Sr) can be removed through the salivary and the intestinal glands by activating the extrarenal mineral/fluid-balance-regulatory system through administration of a parasympathicomimeticum, Pilocarpine nitrate (Setala 1962, 1965; Setala and Kuikka, 1963; Setala, Kuikka and Nyyssonen 1963; Setala, Lindroos and Kuikka, 1964). The same technique is directly applicable to human subjects, and it can be used with a number of radioisotopes in diagnosis and therapy of various diseases of the salivary glands and the thyroid. So far 30 photoscannings have been performed. The purpose of the present report is to outline the technique and show its suitability by demonstrating a case with the Gougerot-Houwer- Sjogren syndrome.