Activity seen in the liver and spleen during a perfusion lung scan would most likely be
due to:
a. Normal physiology and biodistribution
b. Left-to-right cardiac shunt
c. Dissociation and oxidation to free pertechnetate
d. COPD
e. MAA particles smaller than 5 microns - ANSWER-E
According to national standards, how often should the activity linearity of a dose
calibrator be measured?
a. Each day of use
b. Weekly
c. Monthly
d. Quarterly
e. Annually - ANSWER-D
The use of elliptical and/or body contour orbits in SPECT imaging should result in
improved:
a. Temporal resolution
b. Spatial resolution
c. Reconstruction times
d. Acquisition times
e. Patient comfort - ANSWER-B
Which of the following variables does not affect spatial resolution in nuclear medicine
imaging systems:
a. Physical design of the collimator
b. Material of which the collimator is constructed
c. Energy of the gamma rays being counted
d. Computer matrix pixel size
e. Byte vs. word acquisition mode - ANSWER-E
Full width at half maximum (FWHM) is often used as a measure of:
a. Uniformity
b. Sensitivity
c. Intensity
d. Resolution
e. Dead time - ANSWER-D
, According to NRC criteria, which of the following is a misadministration?
a. Infiltration of an attempted intravenous injection
b. Administration of 10 mCi I-131 instead of the prescribed 9 mCi
c. Administration of 20 mCi Tc-99m pertechnetate instead of the prescribed 10 mCi
d. Administration of 15 mCi I-131 sodium iodide intravenously instead of orally as
prescribed.
e. Administration of 5 mCi Tc-99m sulfur colloid to the wrong patient. - ANSWER-D
Chromatography testing of technetium radiopharmaceuticals is done to check for:
a. Aluminum Contamination
b. Molybdenum breakthrough
c. Radionuclidic purity
d. Radiochemical purity
e. Chemical purity - ANSWER-D
Uncorrected flood field nonuniformities cause ____________ artifacts in tomographic
reconstruction.
a. Irregular
b. Dropout
c. Circular
d. Undulating
e. Linear - ANSWER-C
How many 16-bit words of memory are required for a 64 x 64 byte mode image?
a. 2,048
b. 4,096
c. 16,384
d. 32,768
e. 65,535 - ANSWER-A
Areas of prolonged retention of Xe-133 in the lungs are associated with:
a. Reduced trapping in the lung
b. Obstructive lung disease
c. Pulmonary emboli
d. Bacterial pneumonia
e. Septal penetration - ANSWER-B
A patient is to undergo a multiple-gated cardiac blood-pool study with the heart cycle
divided in 20 frames. The patient is in normal sinus rhythm and has a heart rate of 68
bpm. The computer should lock in at what time per frame for this study?
a. 44 milliseconds
b. 56 milliseconds
c. 0.29 seconds
d. 1.5 seconds
e. 3.4 seconds - ANSWER-A