Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 6, Problem 6.17P
To determine
To determine the absorbed dose.
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The rate of a simple enzyme reaction is given by the standard Michaelis–Menten equation:
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Chapter 6 Solutions
Introduction To Health Physics
Ch. 6 - A 50-µC/kg (approximately 200 mR) pocket dosimeter...Ch. 6 - Prob. 6.2PCh. 6 - Prob. 6.3PCh. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - Prob. 6.9PCh. 6 - Prob. 6.10P
Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Prob. 6.14PCh. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Prob. 6.17PCh. 6 - Prob. 6.19PCh. 6 - Prob. 6.20PCh. 6 - Calculate the average power density, in watts per...Ch. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.33P
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- The recommended adult dose of Elixophillin, a drug used to treat asthma, is 6mg/kg of body mass. Calculate the dose in milligrams for a 150lb person.arrow_forwardEstimate the exposure rate 2 m from 4 Ci sources of 57Co,22Na,65Zn?Exposure Rate constant for 57Co=0.9 (R.cm2) / (hr.mCi)Exposure Rate constant for 22Na =12 (R.cm2) / (hr.mCi)Exposure Rate constant for 65Zn =2.7 (R.cm2) / (hr.mCi)arrow_forwardthe V•O2max of people tends to declineafter age 30 by about 9% per decade for sedentary individuals,but it declines less than 5% per decade for people who stay active.The average V•O2max in healthy 30-year-olds is about 3.1 L/min.Using the information given here, what would the average V•O2maxbe in 60-year-olds who have been sedentary throughout theirlives and in 60-year-olds who have stayed active (keep in mindthat the decline is exponential)?arrow_forward
- If the gamma-ray dose rate is 50 mSv hr-1 at a distance of 1.0 m from a source, what is the dose rate at a distance of 10 m from the source?arrow_forward✓ ON "O 2.75 MeV 0.511 MeV 0.511 MeV B, E= 1.73 MeV Eave = 0.721 Mev O MeVarrow_forwardThe dosage of technetium-99m for a lung scan is 20. µCi /kg of body mass. How many millicuries of technetium-99m should be given to a 49 kg person (1 mCi = 1000uCi)? Suppose a person absorbed 46 mrad of alpha radiation.What would be the equivalent dose in millirems?arrow_forward
- A radiographic technique calls for 46 kVp and 28 mAs which results in an exposure of 278 µGy. What is the expected exposure if the technique is changed to 75 kVp and 14 mAs? Round your answer to the nearest whole number. Do not include units.arrow_forwardgiven 4hrs of 80dBA exposure ,2hrs of90 dBA exposure and 2hrs of 85 dBA exposure,what is the % dose? is this person overexposed to noisearrow_forwardCalculate the volume needed to dispense a 21 mCi dose from a Tc-99m DTPA vial containing 400 mCi in 6 ml. Answer:arrow_forward
- The (effective) dose to a patient can be measured in milli-Serverts (mSv) or expressed as the time taken to receive the equivalent dose from background radiation. A certain radiograph gives a 1.232 mSv dose which is equivalent to a background radiation dose of 32 weeks.a)How many days in 32 weeks? Give your answer as a whole number. b)Using the information for the radiograph in this question, calculate the UK daily background dose (in mSv/day). Give your answer to 5 decimal places and use it to this accuracy, if needed in subsequent calculations. c)Another radiograph has a 0.0054 mSv dose. Work out the equivalent background dose (in days) for this radiograph. Give your answer to 2 decimal places and use it to this accuracy in any subsequent calculations. d)How many hours is the number of days in part c) equivalent to? Give your answer to 2 decimal places.arrow_forwardtechnetium half life is 4.8 hours. If a patient receicves a dose with an activity of 35.9 mCi of technetium for cardiac imaging how much radioactivity will be left in the patient's body 96 hours after injection?arrow_forwardThe cell-survival data in the table below fit a multitarget, single-hit survival curve. A)Find the slope at high doses. B) Find the extrapolation number. C) Write the equation that describes the data. Dose (Gy) Surviving Fraction 0.10 0.993 0.25 0.933 0.50 0.729 1.00 0.329 2.00 0.0458 3.00 0.00578 4.00 0.00072 Paragraph BIEEarrow_forward
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