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Review NMTCB 2.016-2.032 Questions and Answers 2024
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Review NMTCB 2.016-2.032
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Review NMTCB 2.016-2.032B. is correct.
A common cause of non-uniformity is a misadjusted photo peak. Since it is also easily
resolved, it should be checked first when the flood field image is noticeably different
from day to day. - answer2.016 If a noticeable change in field uniformity of a gamma
scintillation camera occurs, the technologist should first check the:
A. temperature
B. photo peaking
C. collimator
D. system for contamination
D. is correct.
The orthogonal hole phantom consists of holes of equal diameter at right angles to each
other that cover the entire surface of the detector. - answer2.017 Of the following
phantoms to assess spatial resolution, the only one that determines the resolution of all
areas of the detector with one image is the phantom.
A. Hine-Duley
B. four-quadrant
C. parallel-line equal-space (PLES)
D. orthogonal holeS
C. is correct.
Spatial linearity can be assessed by evaluating the "straightness" of parallel bars or
parallel rows of holes. - answer2.018 In addition to spatial resolution, what other
parameter of the detection system can be assessed with either a bar or orthogonal hole
phantom?
A. sensitivity
B. uniformity
C. spatial linearity
D. geometric variation
B. is correct.
The "Cutie Pie" survey meter gives a true value regardless of the type of energy of
radiation. - answer2.019 One of the advantages of the "cutie pie" as a survey meter is
that it:
A. responds only to contamination levels of radiation
B. is independent of the energy of the radiation
, C. responds only to high level radiation
D. responds only to low level radiation
B. is correct.
The two types of survey meters are the "Cutie Pie" which is an ionization type and the
Geiger-Mueller (G-M) type - answer2.020 The primary difference between the Cutie Pie
detector and a Geiger Mueller detector is:
A. method of detection
B. operating potential
C. display modes
D. ambient potential
C. is correct.
Constancy, or the ability of the dose calibrator to reproduce measurements of a source
of known activity from day to day is required to be tested daily and be within 10% of the
decay corrected activity of the standard sample. - answer2.021 Of the following dose
calibrator quality control tests, which is required to be tested daily by the NRC?
A. geometric dependence
B. activity linearity
C. constancy
D. accuracy
B. is correct.
Geometry and volume can affect the measurement of a patient dose. Syringe size, dose
concentration, and containers (vial vs syringe) can affect the reading from the true or
actual activity of the source. - answer2.022 When assaying a patient dose, if the sample
is elevated slightly in the dose calibrator, the dose read-out will be
A. higher than the actual dose
B. lower than the actual dose
C. the same as the actual dose
B. is correct
Errors greater than 10% of actual activity readings require corrective action. In addition,
the NRC requires that quality control records be retained for 3 years. - answer2.023
When performing quality control tests of constancy, accuracy, linearity, and geometric
variation, the NRC directs correction by repair, replacement, or use of correction factors,
if the error is greater than:
A. 5%
B. 10%
C.15%
D. 20%
D. is correct.
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