NMTCB Exam Questions with Correct Answers

NMTCB Exam Questions with Correct Answers O-15 half life - Answer-2 min C-11 half life - Answer-20 min Radiochemical purity - Answer-fraction of the total radioactivity in a source that is present in the desired chemical form bound tc unbound tc hydrolyzed, reduced tc Chemical purity - Answer-fraction of the material in the desired chemical form. sterility - Answer-Absence of viable microorganisms BET and LAL testing - Answer-test for pyrogens True event - Answer-two annihilation photons from a single interaction are detected within the timing window Random coincidence - Answer-two single events from two separate annihilations are detected within the timing window Scatter event - Answer-scatter of photons between origin and detectors Blank scan - Answer-this is performed on a PET scanner daily and uses a long lived source (ex Germanium 68) to produce sinograms for the detector pairs in each ring Normalization scan - Answer-evaluation of the correction factors that are applied to every study. Performed overnight. performed quarterly. exposing all detector pairs to a 511 keV photon