PET scanners have to be close to the source of positrons because:
A) the positrons cannot travel very far.
B) the nuclides are so unstable.
C) of the examination radioactivity of the nuclides.
D) of the short half-lives of the nuclides.
Correct Answer:
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Q1: Scintillation detectors or gamma cameras use crystals
Q3: If only one photon is detected and
Q4: The crystal used in gamma cameras is
Q5: One desirable characteristic of a radiopharmaceutical is:
A)
Q6: One of the major benefits of fusion
Q7: Unwanted photons or "noise" are reduced by
Q8: The radiotracer for PET scanning is chosen
Q9: Naturally occurring radionuclides are not used for
Q10: When a positron and an electron combine,the
Q11: Collimators are used in nuclear medicine to:
A)
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