Nuclear Medicine Final Exam Questions with 100% Correct Answers

Nuclear Medicine Final Exam Questions with 100% Correct Answers How does 201 Tl decay? a. by positron emission b. by electron capture c. by beta emission d. none of the above b. by electron capture What is the role of the stannous ion in the preparation of pharmaceuticals labeled with 99mTc? a. to increase the valence state from +4 to +7 b. to reduce the amount of Al3+ present c. to reduce the valence state of 99mTc d. to reduce the radiation dose c. to reduce the valence state of 99mTc If an assay of a vial containing 131I shows 50 mCi present on May 2, approximately what will the assay show on May 18? a. 25 mCi b. 12.5 mCi c. 40 mCi d. 6 mCi b. 12.5 mCi If a bone scan has been ordered on a 5-year-old girl, and the physician prescribes 62% of the adult dose to be given, how many mCi should be administered? a. 21.7 mCi b. 12.4 mCi c. 7.4 mCi d. 3.1 mCi b. 12.4 mCi If the biological half-life of an isotope is 6 hours, and the physical half-life is 12 hrs, what is the effective half-life? a. 6 hrs b. 12 hrs c. 2 hrs d. 4 hrs d. 4 hrs Which of the following has been used to abbreviate physical half-life? a. Tp b. T/2 c. T2 d. P 1 /2 a. Tp The physical half life of a radionuclide is the time it takes: a. for half of the substance to leave the body b. for the nuclide to decay to one half of the original activity c. for the kit to become half expired d. for half of the substance to be metabolized b. for the nuclide to decay to one half of the original activity If a kit has 310 mCi of activity present at 8:00 a.m., what will the vial assay show in 4 hours and 10 minutes if the decay factor is 0.618? a. 175 mCi b. 192 mCi c. 501 mCi d. 155 mCi b. 192 mCi A vial containing 99mTc is a