Nuclear Medicine Board Review 5.0
Exam Questions and answers with
100% Complete solutions | verified
&updated 2024
why must a patient be placed several inches from the end of the uptake probe? -
✔✔to ensure the entire organ of interest is within the field of view
what is an uptake probe commonly used for? - ✔✔thyroid uptake studies
what would occur if the patient is too close to the uptake probe or if the area of
interest is too large? - ✔✔counts will be lost because some of the photons
being emitted will miss the opening of the collimator
a dose calibrator is what? - ✔✔an ionization chamber
what does a dose calibrator measure in (unit)? - ✔✔curie or becquerels
rather than cpm
,what type of photons do dose calibrators more frequently pick up over others? -
✔✔gamma photons over Beta (B) radiation because only high energy B
radiation can pass through the glass chamber walls
what is the benefit of using SPECT imaging over planar? - ✔✔SPECT provides
greater sensitivity and resolution in imaging deep tissue or when there are other
interfering tissues
what is the benefit of SPECT imaging from many angles? - ✔✔exact location
and size can be better determined for tumors and pathologies
why is patient to detector distance a problem with SPECT imaging? - ✔✔the
camera may be very close to the patient at some projections and far away at
others
, why are PET crystals denser and thicker than gamma camera crystals? -
✔✔to stop the 511 keV photons produced during annihilation
systematic errors are ____________ but _____________________- -
✔✔consistent
inaccurate
what can systematic errors be found through? - ✔✔chi-square test
random error will ________________ and is _______________________ -
✔✔always exist
impossible to eliminate
can systematic errors be precise or accurate? - ✔✔can be precise but
not accurate
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