Patient dose in diagnostic radiology -- a proposal for state control

Concept of genetically significant dose (GSD) is explained. Estimated average gonad doses in states Maharashtra and Tamilnadu are given. Studies in U.S.A. and U.K. have shown that the major cause of GSD is that the field size used is larger than required. Proper field size, sensitive intensifying screens made of gadolinium oxysulfide and use of aluminium filters can reduce patient dose in diagnostic radiology. As diagnostic radiology contributes the largest percentage of man-made radiation exposure to population and uncontrolled increase in X-ray diagnosis procedures is evident, a statutory control of patient dose in diagnostic radiology is advocated. Ways of statutory control are enumerated. (M.G.B.)