44. A nuclear power plant accident exposes a population of 24,000 people to an A. 0.38 person-Sv average effective dose of 9.2 mSv. What is the collective effective dose? B. 0.38 man-rem C. 220 person-Sv D. 220 man-rem
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- Equivalent Dose = Absorbed Dose x Radiation weighting factor HT = DX WR re some Radiation weighting factors: ation Tyne Radiation weighting factor (Wol RBE - Dose of standard radiation required to produce an effect (Dref) Dose of radiation being tested to produce the SAME effect (Dr) RBE = Dref Dr Definition of Exposure . • • • The interaction of radiation waves with particles of air results in charged ions. Exposure is defined as the quantity of charged ions per unit mass of air. E = m Unit of exposure is Ckg1 (coulomb per kilogram) E is exposure Q is the quantity of charge on the ions (Coulomb, C) m is the unit mass of air (Kilograms, kg)A Geiger counter is placed at a distance 2m from a Cobalt 60 source emitting γ rays. The measured count rate is 545/min.. What is the count rate when the Geiger counter is moved to a new position 7m from the 60Co? Select one: a. 3.24/s b. 25.43/s c. 71.22/s d. 44.5/minA 7. A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one patient. Ten hours later, the activity of one cubic centimeter of blood is 30 Bq. Calculate the patient's blood volume.
- 15. An IV infusion is administered to a 120 lb patient by IV infusion at a rate of 1.8 mg/kg/hr. The drug has a half-life of 8 hours and distributes into a volume of 15 L. a) Find the concentration function C(t) while the infusion is being administered. b) Find the loading dose required to make C(1) a constant if the infusion continues. c) If the loading dose from part b is given followed by 24 hours of infusion at 1.8 mg/kg/hr, graph the concentration for the first 48 hours. d) If the loading dose from part b is given followed by 24 hours of infusion at 1.8 mg/kg/hr, how long will the concentration remain within the therapeutic window of 50-100 mcg/ml?1.Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gramsample of initially pure iodine-131 is stored for 32 days. Howmuch iodine-131 remains in the sample afterward? 2.The amount of carbon-14 in an ancient wooden bowl isfound to be one-half that in a new piece of wood. How old isthe bowl?3. A radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the exposure value received by the worker while standing for 2 hr near the source. The isotop half-life is 271.8 days.
- how much dose is absorbed in 30 min in a sphere of water 1cm in diameter, with an infinitesimally small P-32 souce placed at center of the sphere, with 6x105 disintegrations per gram of water? Eb- = 1.71 MeV A) 12 cGy B) 24 cGy C) 29 cGy D) 6cGy E) 59 cGyA. 1.8 Sv 43. A patient received a full-body electron dose of 240 mGy, a neutron dose (1 В. 1.1 mSv С. 0.85 Sv MeV) of 43 rad, and an alpha particle dose of 0.30 Gy. What was the effective dose to this patient's stomach? D. 130 mSv38. A patient receives an x-ray dose of 200 mGy, a 20-keV neutron dose of 70 mGy, and a proton dose of 200 mGy. What is the equivalent dose to this A. 0.95 Sv В. 1.1 Sv C. 4.9 Sv patient? D. 1.3 Sv A. 31 Sv В. 31 rеm С. 52 Sv 39. What is the equivalent dose for a patient who has received a gamma ray dose of 22 rad, a proton dose of 3.2 rad, and an alpha particle dose of 1.2 mGy? D. 52 rеm
- A 53.0 kgkg laboratory worker is exposed to 26.0 mJmJ of beta radiation with RBE = 1.5. What is the dose equivalent in mremmrem?A Geiger counter is placed at a distance 2m from a Cobalt 60 source emitting γ rays. The measured count rate is 545/min.. What is the count rate when the Geiger counter is moved to a new position 7m from the 60Co? Select one: a. 25.43/s b. 3.24/s c. 44.5/min d. 71.22/sQuestion 9 a) A patient receives an absorbed dose of 0.045 mSv of alpha radiation. The radiation weighting factor of the radiation is 20. Calculate the equivalent dose received by the patient.