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A model for calculating shielding requirements in diagnostic X-ray facilities

¹ Medical Physics Unit, "Konstantopoulio-Agia Olga" Hospital, 3–5 Agias Olgas, Nea Ionia, 142 33, Athens, ² Medical Physics Department, Medical School, University of Athens, 75 Mikras Asias, 115 27, Athens and ³ Radiology Department, Areteion Hospital, 76 Vasilissis Sophias, 115 28, Athens, Greece

View larger version (19K): [in a new window]   Figure 1. A schematic diagram explaining the principle of the model introduced by Petrantonaki et al [3]. If a material Y, e.g. a concrete wall, of thickness y1 is already present, then the thickness x1 of another shielding material X, e.g. lead, that should be placed in front of y1 to bring the exposure down to the limit, is that attenuating the X-ray beam by as much as thickness y2 of material Y, where B(y2+y1) is the required relative attenuation to comply with the dose limit.

View larger version (22K): [in a new window]   Figure 2. A schematic diagram of an X-ray facility for general radiography with chest bucky.