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NMTCB-PET boards prep Questions and Answers
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NMTCB-PET boards prep
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NMTCB-PET boards prepWhat PET scintillation crystal is used most? – answer BGO
How is PET spatial resolution determined? - answer by size of crystals and their
separation
What is a true coincidence event? - answer2 annihilation photons from a single
annihilation interaction striking 2 detectors at the same time
What is a random coincidence event? - answer2 atoms from 2 different annihilation
events
Which matrix is the most commonly used imaging matrix in PET? - answer128x128
Which matrix is most commonly used for PET QC? - answer256x256
In PET/CT, what is the CT component used for? - answer anatomical correlation and
attenuation correction
SUV - answerstandard uptake value
What is SUV used for? - answerQuantifying physiologic process
Above what value is physiology considered malignant? - answer2.0 cps/voxel
What is the most commonly used radionuclide for PET imaging? - answerF18-FDG
3D imaging does not used "septa" to reduce image noise-- what is used instead? -
answerelectronic collimation
Positron - answerPositively charged electron
What is the proton/neutron ration for a positron emitter? - answerproton rich, neutron
poor
If each PET positron emitter gives off a different positron energy, and the higher the
energy the greater the mean range of travel, what happens to image resolution? -
answerLarger range = slight mis-positioning of annihilation event which decreases
image resolution
What is the half-life (T1/2) for F18-FDG? - answer110 minutes
, What is the half-life of C-11? - answer20.4 minutes
What is the half-life of N-13? - answer10 minutes
What is the half-life of O-15? - answer2 minutes
What is the half-life of Rb82? - answer76 seconds
What PET procedure is F18-FDG used for ? - answertumor imaging, brain imaging
What PET procedure is F18 NaF used for? - answerA: Bone imaging *
B: Brain Imaging
C: Lung Imaging
D: Perfusion Imaging
What PET procedure is C-11 used for? - answerquantitative myocardial perfusion and
prostate Ca
What PET procedure is N-13 Ammonia used for? - answerPerfusion imaging
What PET procedure is Rb-82 Ammonia used for? - answerMPI
What PET procedure is O-15 used for? - answerPerfusion and Metabolic
True or False: Full ring PET scanners rotate - answerFalse: only the CT component
rotates
What is a coincidence timing window (CTW)? - answerSet window used to register
annihilation photons (2 annihilation photons)
It is designed to discard any event not "paired" (these are randoms/noise)
What is single photon elimination? - answerA single, non-paired photon detected by the
CTW )random, scatter, etc) discarded by the CTW
What scintillator properties are most ideal for a PET scintillator? - answerA: high density
with good stopping power
B: Efficient, allowing in lots of light
C: Short decay constants
D: Good energy resolution
E: All of the above **
Time of Flight (TofF) - answerMeasures difference in photon arrival times in opposing
detectors
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