Single-photon emission computed tomography (SPECT) and positron emission tomography (PET)

Are the following statements regarding PET true or false? Positive beta emitters include: (a) Carbon-12. (b) Nitrogen-13. (c) Oxygen-16. (d) Oxygen-17. (e) Fluorine-18.

(a) False - carbon-11 gives off positrons. (b) True. (c) False. (d) False - oxygen-15 gives off positrons. (e) True.