The radiation dose in section radiography (tomography) was determined by measurements on phantoms, cadavers and living sub-jects. Both in the area of direct radiation and in surrounding areas the dose, with slightly varying distribution, is of the same order as in survey radiography under identical conditions. Dose requirements in sectional and standard radiography are governed by the same rules. The statistical assessment of gonad doses in patients indicates that radiation received during tomography makes only an insignificant contribution to the total radiation exposure of the population during diagnostic roentgen examinations.