Ramer · Alavi Nuclear Medicine Technology

3 Radiation Safety 215) The inverse square law, in words, says:a. if you double the distance from the source of activity,you reduce exposure to 25% of the original intensityb. if you double the distance from the source of activity,you decrease exposure by 25%c. if you halve the distance from the source of activity,you decrease exposure to 25% of the original intensityd. if you halve the distance from the source of activity,you decrease exposure to one fourth of the originalintensity6) What is the best way to decrease the radioactive doseto visitors if a patient is surveyed to emit 3 mR/hrat bedside?a. have the patient wear lead apronsb. keep the patient well hydrated and encourage frequentvoidingc. have the visitor sit or stand as far as possible frombedsided. have the visitor wear lead shielding7) Which of the following isotopes would be effectivelyshielded by a plastic syringe?a. 67 Gab. 89 Src. 99m Tcd. 81m Kre. 133 Xe8) What is the NRC annual dose limit allowed to the lensof the eye?a. 1.5 mremb. 15 remc. 50 remd. 5 rem