1. A radiopharmaceutical has a physical half-life of 360 minutes and a biological half-life of 20 h & 15 minutes. How long will it take for the activity in the patient to fall to a quarter of a percent of that injected?
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Q: A drug tagged with Tc (half-life= 6.05 h) is prepared for a patient. If the original activity of the…
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- 43 3. A drug prepared for a patient is tagged with Tc which has a half life of 6.05 h and an activity of 1.70 µCi when it was prepared. Suppose the drug containing Tc is injected into the patient 1.00 h after it is prepared. What is its activity at 99 43 the time it is injected? 60 μCi ssf60 mins f60 ssf ssf60"an 60 ss wha 50 ssf60⁰A 70kg patient is injected with 2.0 x 1013 atoms of Tc99m for a nuclear medicine imaging study. Assume that all the atoms decay and that each decay gives a gamma ray depositing 140 keV what is the dose? (a) 0.45 mSv (b) 6.4 μSv (c) 4.5 Sv (d) 6.4 mSv (e) 9.6 mSv85Sr is a short-lived (half-life 65 days) isotope used in bone scans. A typical patient receives a dose of 85Sr with an activity of 0.10 mCi. If all of the 85Sr is retained by the body, what will be its activity in the patient’s body after one year has passed?
- A 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.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.Strontium-90 from the testing of nuclear bombs can still be found in the atmosphere. Each decay of 90Sr releases 1.10 MeV of energy into the bones of a person who has had strontium replace his or her body’s calcium. Assume a 70.0-kg person receives 1.00 ng of 90Sr from contaminated milk. Take the half-life of 90Sr to be 29.1 yr. Calculate the absorbed dose rate (in joules per kilogram) in one year.
- 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.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?A building has become accidentally contaminated with radioactivity. The longest-lived material in the building is strontium-90. (The atomic mass of 90/38 Sr is 89.9077 u.) If the building initially contained 8.6 kg of this substance and the safe level is less than 10.4 counts/min, how long will the building be unsafe? Provide answer in number of years.
- 4. 500 mCi sample of radioisotope was purchased by a medical supply house. If the sample has the half-life of 15 days. How long will it keep before it's activity is reduced to 25 mCi ?You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the bone? Please give your answer in years.Give good explanation Asap Thanks