Radionuclides used to label radiopharmaceuticals for nuclear imaging should decay by

Question

Quizplus · Accepted Answer

Radionuclides used to label radiopharmaceuticals (RaPhs) for nuclear medicine imaging should decay by either gamma or positron (F1F1F1S1F1F1F10⁺) emission.Gamma radiation emitted from RaPhs readily penetrates tissues and escapes from the body.Positron-emitting radionuclides produce two 0.511-MeV gamma photons emitted in opposite directions from the positron-electron annihilation.The angle of nearly 180 degrees of the emitted 0.511-MeV photons is exploited in positron emission tomography (PET) to allow electronic collimation of the radiation and determination of the three-dimensional location of the decay event.

Radionuclides Used to Label Radiopharmaceuticals for Nuclear Imaging Should Decay