Multiple Choice
Suppose oxygen-15 is used as the tracer isotope in a PET (positron emission tomography) study. Which of the following best describes how the PET scanner traces the oxygen-15 after it has been injected into a participant's bloodstream?
A) The oxygen-15 nuclei decay and emit electrons, the electrons collide with positrons to create gamma rays, and the gamma rays are then detected by the PET scanner.
B) The oxygen-15 nuclei decay and emit positrons, and the positrons are then detected by the PET scanner.
C) The oxygen-15 nuclei decay and emit electrons, and the electrons collide with photons, creating positrons which are then detected by the PET scanner.
D) The oxygen-15 nuclei decay and emit positrons, the positrons collide with electrons to create gamma rays, and the gamma rays are then detected by the PET scanner.
Correct Answer:
Verified
Correct Answer:
Verified
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