NUCLEAR MEDICINE INSTRUMENTATION
EXAM QUESTIONS AND ANSWERS 100%
PASS
Well counter use in non imaging studies - CORRECT ANSWER:-used to count
blood plasma and urine samples when Standards for blood volume or Schilling
tests are diluted to a known percentage of the original patient dosage
Uptake probe - CORRECT ANSWER:-Uses a sodium iodide crystal to quantitate
activity within a patient. May be connected to the spectrometer used by the well
counter
The standard used for thyroid uptake studies - CORRECT ANSWER:-The
patient's capsule or another capsule prepared at the same time and activity.
Dilution not required for uptake probe
SPECT vs planar - CORRECT ANSWER:-SPECT has Greater sensitivity and
resolution especially in deep tissues or overlapping structures.
PET crystals must be thicker and denser than those in gamma cameras to -
CORRECT ANSWER:-Stop the 511 kiloelectron volt photons produced during
positron annihilation
, The advantage of PET over SPECT - CORRECT ANSWER:-Higher resolution
When counting radiation for quantitative studies you should limit percentage of
error to - CORRECT ANSWER:-Two percent at the ninety five percent
confidence level
Minimum counts that should be used for samples and standards in quantitative
studies - CORRECT ANSWER:-Ten thousand counts
To achieve accuracy, all of the following geometry parameters must be identical for
a particular study - CORRECT ANSWER:-Sample volume, sample container, and
sample placement. Samples containing high activity be diluted, and a dilution factor
must be included in the calculation
If both sample and standard contain high activities - CORRECT ANSWER:-They
can be counted on top of the well instead of within it as long as the same geometry
is used
Spectrometer - CORRECT ANSWER:-Used in well counters and uptake probes
to select the energies that are to accepted by the height analyzer
Effects of Increasing source to parallel hole collimator distance - CORRECT
ANSWER:-Resolution decreases, sensitivity decreases
Effects of increasing source to diverging collimator distance - CORRECT
ANSWER:-Resolution decreased sensitivity decreased and magnification decreased
EXAM QUESTIONS AND ANSWERS 100%
PASS
Well counter use in non imaging studies - CORRECT ANSWER:-used to count
blood plasma and urine samples when Standards for blood volume or Schilling
tests are diluted to a known percentage of the original patient dosage
Uptake probe - CORRECT ANSWER:-Uses a sodium iodide crystal to quantitate
activity within a patient. May be connected to the spectrometer used by the well
counter
The standard used for thyroid uptake studies - CORRECT ANSWER:-The
patient's capsule or another capsule prepared at the same time and activity.
Dilution not required for uptake probe
SPECT vs planar - CORRECT ANSWER:-SPECT has Greater sensitivity and
resolution especially in deep tissues or overlapping structures.
PET crystals must be thicker and denser than those in gamma cameras to -
CORRECT ANSWER:-Stop the 511 kiloelectron volt photons produced during
positron annihilation
, The advantage of PET over SPECT - CORRECT ANSWER:-Higher resolution
When counting radiation for quantitative studies you should limit percentage of
error to - CORRECT ANSWER:-Two percent at the ninety five percent
confidence level
Minimum counts that should be used for samples and standards in quantitative
studies - CORRECT ANSWER:-Ten thousand counts
To achieve accuracy, all of the following geometry parameters must be identical for
a particular study - CORRECT ANSWER:-Sample volume, sample container, and
sample placement. Samples containing high activity be diluted, and a dilution factor
must be included in the calculation
If both sample and standard contain high activities - CORRECT ANSWER:-They
can be counted on top of the well instead of within it as long as the same geometry
is used
Spectrometer - CORRECT ANSWER:-Used in well counters and uptake probes
to select the energies that are to accepted by the height analyzer
Effects of Increasing source to parallel hole collimator distance - CORRECT
ANSWER:-Resolution decreases, sensitivity decreases
Effects of increasing source to diverging collimator distance - CORRECT
ANSWER:-Resolution decreased sensitivity decreased and magnification decreased
