Chapter 1, Problem 8P

If a patient receives a dose with an activity of 37.5 mCi of technetium-99m for cardiac imaging, how much radioactivity will be left in the patient’s body 72 hours after injection?

Calculate the dose in Sv to the chest at a patient given an xray under the following conditions. The xray beam intensity is 1.50 W/m2, the area of the chest exposed is 0.0750 m2 35.0% of the xrays are absorbed in 20.0 kg of tissue, and the exposure time is 0.250 s.

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?

Technetium-99 m has a half life of 4.8 hours. If a patient receives a dose with an activity of 60.2 mCi of Technetium 99 for cardiac imaging how much radioactivity will be left in the patients body 48 hours after injection?

A sample of silver contains 5.00 micrograms of Ag-105.  Determine the activity of the sample in millicuries? T1/2=41.29 days

A medical laboratory stock solution is prepared with an initial activity due to 24Na of 2.5 mCi/mL, and 10.0 mL of the stock solution is diluted at t0 = 0 to a working solution whose total volume is 250 mL. After 48 h, a 5.0 - mL sample of the working solution is monitored with a counter. What is the measured activity? Note: 1 mL = 1 milliliter.

What is the mad number of a nucleotide that is half the diameter of a U-238 nucleus?

What is the mass of 60 Co in a cancer therapy transillumination unit containing 5.00 kCi of 60 Co ?

The Q-value of a reaction is the amount of energy released during the reaction. It is stated thatin step 1 of the PPI thermonuclear reaction chain,1H +1H → 2H + e+ + ν,1.44 MeV energy is released; then in step 2: 2H + 1H → 3He + γ and step 3,3He + 3He → 4He + 1H + 1H, 5.5 MeV and 12.8 MeV are released, respectively. Prove byappropriate calculation that the above quoted Q-values in MeV are true. The relevant masses:hydrogen 1.00782503214, helium-4 4.002603, positron 0.00054857991, deuterium 2.0141 andhelium-3 3.0160 are all quoted in the atomic units of mass which is 1.6605387 × 10−27 kg. Ignorethe neutrino contribution.