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PET-CT Springer NMTCB Practice Questions and Answers 2024
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PET-CT Springer NMTCB Practice
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PET-CT Springer NMTCB PracticeWhich of the following radionuclides is not a positron emitter?
(a) 82Rb
(b) 15O
(c) 18F
(d) 14C
(e) 68Ga - answer(d) 14C
14C decays by beta emission.
When a neutron-deficient nucleus emits a positron:
a) Atomic mass number decreases by 1.
(b) Atomic mass number increases by 1.
(c) Atomic number increases by 1.
(d) Atomic mass number is unchanged. - answer(d) Atomic mass number is unchanged.
The atomic mass number is the number of particles in the nucleus.
Because the proton is "converted" to a neutron, the number of protons decreases by
one, and the number of neutrons is increased by one, so the net effect is no change to
the atomic mass number.
The atomic number, which is the number of protons in the nucleus, decreases by one.
Which of the following has the shortest half-life?
(a) 82Rb
(b) 13N
(c) 15O
(d) 18F - answer(a) 82Rb
82-Rb has a half-life of 1.3 min
13-N has a half-life of 10 min
15-O has a half-life of 122.2 s,
18-F has a half-life of 109 min.
Which of the following will not affect the distribution of 18F-FDG on a PET image? '
(a) Intense physical activity the day before imaging
(b) Serum insulin level
(c) Serum glucose level
(d) Bladder catheterization
, (e) All of the above affect distribution - answer(e) All of the above affect distribution
Catheterization can decrease the activity in the pelvis
All positron-emitting isotopes are produced in a cyclotron.
(a) True
(b) False - answerfalse
82-Rb is eluted from generators containing 82-Sr
What part of a PET scanner quality control regimen is necessary for the computation of
attenuation factors?
(a) Coincidence timing calibration
(b) Normalization correction
(c) PMT gain adjustment
(d) Blank scan - answer(d) Blank scan
A blank scan is performed using a transmission source in an empty field of view.
This is used to monitor system stability and is also needed along with the transmission
scan to perform attenuation correction.
In CT systems a blank scan is often referred to as an air cal
Which of the following describes a random coincidence?
(a) The simultaneous detection of annihilation photons originating from a single positron
(b) The simultaneous detection of annihilation photons originating from a single positron
although one of the photons has been scattered before reaching the detector
(c) The simultaneous detection of photons originating from different positrons -
answer(c) The simultaneous detection of photons originating from different positrons
Following a positron annihilation, two 511 keV photons are emitted in opposite
directions. If one of the photons is deflected in the body:
(a) Only the unscattered photon will contribute to the image
(b) The deflected photon may be detected outside the correct LOR
(c) The LOR may contain an angle
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