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Ramer · Alavi Nuclear Medicine Technology

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2 Radioactivity, Radiopharmacy,and Quality Assurance1) How does 201 Tl decay?a. by positron emissionb. by electron capturec. by beta emissiond. none of the above2) What is the role of the stannous ion in the preparationof pharmaceuticals labeled with 99m Tc?a. to increase the valence state from +4 to +7b. to reduce the amount of Al 3+ presentc. to reduce the valence state of 99m Tcd. to reduce the radiation dose3) If an assay of a vial containing 131 I shows 50 mCi presenton May 2, approximately what will the assay show onMay 18?a. 25 mCib. 12.5 mCic. 40 mCid. 6 mCi4) If a bone scan has been ordered on a 5-year-old girl,and the physician prescribes 62% of the adult dose to begiven, how many mCi should be administered?a. 21.7 mCib. 12.4 mCic. 7.4 mCid. 3.1 mCi

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