HEALTH PHYSICS = Cardinal Principles of Radiation Protection?

%26gt; The exposure rate from a point source is 100 mR/hr at 120 cm. What is the exposure rate at 30 cm from the source?





%26gt; If a survey meter reads 25 mR/hr, how long can a person stay at that location before receiving an exposure of 100 mR?





%26gt; An x-ray tube has an output intensity of 2.8 mR/mAs. If 200 mA at 50 msec is used, what is the total exposure?





%26gt; A fluoroscope emits 2 R/mA-minute at the table top for every mA of operation. What is the approximate patient entrance skin exposure (ESE) after a 3 minute fluoroscopic examination conducted at 2 mA?





%26gt; What exposure will a radiologic technologist receive when exposed for 10 minutes at 4 meters from a source with intensity of 100 mR/min at 1 meter?





%26gt; Using the information in question number 5, if the technologist is wearing an apron equivalent to 2 HVL, what would his/her exposure be underneath the apron?

HEALTH PHYSICS = Cardinal Principles of Radiation Protection?
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