A patient swallows a radiopharmaceutical tagged with phosphorus-32 (P), a ß¯ emitter with a half-life of 14.3 days. The average kinetic energy of the emitted electrons is 7.00 x 10² keV. If the initial activity of the sample is 1.31 MBq, determine (a) the number of electrons emitted in a 10.0-day period, (b) the total energy deposited in the body during the 10.0 days, and (c) the absorbed dose if the electrons are com- pletely absorbed in 1 × 10² g of tissue.

A patient swallows a radiopharmaceutical tagged with phosphorus-32 (P), a ß¯ emitter with a half-life of 14.3 days. The average kinetic energy of the emitted electrons is 7.00 x 10² keV. If the initial activity of the sample is 1.31 MBq, determine (a) the number of electrons emitted in a 10.0-day period, (b) the total energy deposited in the body during the 10.0 days, and (c) the absorbed dose if the electrons are com- pletely absorbed in 1 × 10² g of tissue.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 73.0 kg person experiences a whole-body exposure to alpha radiation with energy of 1.50 MeVMeV. A total of 5.40×1012 alpha particles is absorbed. Use the Table of Relative biological effectiveness (RBE) for several types of radiation. A) What is the absorbed dose in rad? Express your answer in rads. B) What is the equivalent dose in rem? Express your answer in rem. C) If the source is 0.0100 g of 226Ra (half-life 1600 years) somewhere in the body, what is the activity of the source? Express your answer in decays per second. D) If all the alpha particles produced are absorbed, what time is required for this dose to be delivered? Express your answer with the appropriate units.
A laboratory rat is exposed to an alpha-radiation source whose activity is 14.3 mCi.The rat has a mass of 385 g and is exposed to the radiation for 14.0 s, absorbing 35% of the emitted alpha particles, each having an energy of 9.12 * 10-13 J. Calculate the absorbed dose in millirads and grays.
Technetium-99m is very useful in diagnostic imaging since it has a short effective half-life of 4.8 hours. If a patient receives a dose with an activity of 41.6 mCimCi of technetium-99m for cardiac imaging, how much radioactivity will be left in the patient’s body 72 hours after injection?
It has become popular for some people to have yearly whole-body scans (CT scans, formerly called CAT scans) using x rays, just to see if they detect anything suspicious. A number of medical people have recently questioned the advisability of such scans, due in part to the radiation they impart. Typically, one such scan gives a dose of 12 mSv, applied to the whole body. By contrast, a chest x ray typically administers 0.20 mSv to only 5.0 kg of tissue. How many chest x rays would deliver the same total amount of energy to the body of a 75 kg person as one whole-body scan?
A patient receives a dose of radiation by ingesting a radioactive medication containing 32P, which emits B rays with an RBE of 1.5. The energy of each emitted B is 705 keV. The half-life of 32p is 14.28 days, and the initial activity of the medication is 1.34 MBq. What is the absorbed dosage (in rad) over a period of 7.00 days, assuming the radiation is absorbed by 125 g tumor? (Recall that 1 Ci = 3.7 x 1010 Bg) 62 230 93 153 98
A. A cobalt-60 source with activity 2.60×10-4 Ci is embedded in a tumor that has mas 0.20 kg. The source emits gamma photons with average energy 1.25 MeV. Half the photons are absorbed in the tumor, and half escape. i. What energy is delivered to the tumor per second? ii. What absorbed dose, in rad, is delivered per second?niii. What equivalent dose, in rem, is delivered per second if the RBE for these gamma rays is 0.70? iv. What exposure time is required for an equivalent dose of 200 rem?
question 4 please
4
A 88.3 kg patient is given a bone scan. A phosphorus compound containing the gamma-emitter 99Tc. is injected into the patient. It is taken up by the bones, and the emitted gamma rays are measured. The procedure exposes the patient to 8.10 mSv of radiation. What is the total energy deposited in the patient's body in Joules?
A sample has a ¹4C activity of 0.0074 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have been as much as 47% larger. Repeat part (a), taking into account this 47% increase. (a) Number i (b) Number i Units Units