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Questions and Answers
What is the primary reason for desiring fast radioactive decay in radiopharmaceuticals?
What is the primary reason for desiring fast radioactive decay in radiopharmaceuticals?
- To increase the total patient exposure.
- To localize the radiopharmaceutical at the target site.
- To extend the examination time.
- To reduce the total patient exposure. (correct)
What percentage of initially administered 18F is left after 12 hours?
What percentage of initially administered 18F is left after 12 hours?
- 25%
- 1.6% (correct)
- 0.5%
- 50%
Why is the fraction of 18F remaining even lower than expected after 12 hours?
Why is the fraction of 18F remaining even lower than expected after 12 hours?
- Due to the emission of gamma rays.
- Due to the presence of a stable daughter nucleus.
- Due to slow radioactive decay.
- Due to the radiopharmaceutical being excreted through the urine. (correct)
What is a desirable characteristic of an ideal radiopharmaceutical?
What is a desirable characteristic of an ideal radiopharmaceutical?
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What should be the effective half-life of an ideal radiopharmaceutical?
What should be the effective half-life of an ideal radiopharmaceutical?
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What type of radiation is desirable in an ideal radiopharmaceutical?
What type of radiation is desirable in an ideal radiopharmaceutical?
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What should be the energy of the gamma rays emitted by an ideal radiopharmaceutical?
What should be the energy of the gamma rays emitted by an ideal radiopharmaceutical?
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What should be the site of localization for an ideal radiopharmaceutical?
What should be the site of localization for an ideal radiopharmaceutical?
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What is the advantage of the Cyclone-30 isotope-producing cyclotron?
What is the advantage of the Cyclone-30 isotope-producing cyclotron?
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What happens to the atomic number of a nucleus when it emits a gamma ray?
What happens to the atomic number of a nucleus when it emits a gamma ray?
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