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What is the fraction of the total radioactivity in the form of the desired
radionuclide present in a radiopharmaceutical called?
A) aluminum contamination
B) molybdenum breakthrough
C) radionuclidic purity
D) radiochemical purity
E) chemical purity - 🧠 ANSWER ✔✔C) radionuclidic purity
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) spatial resolution
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) resolution
Uncorrected flood field nonuniformities cause ___________ artifacts in
tomographic reconstruction.
A) irregular
B) dropout
C) circular
D) undulating
, E) linear - 🧠 ANSWER ✔✔C) circular
What areas of prolonged retention of Xe-133 in the lungs associated with?
A) reduced trapping in the lung
B) obstructive lung disease
C) pulmonary emboli
D) bacterial pneumonia
E) extended equilibrium phase - 🧠 ANSWER ✔✔B) obstructive lung
disease
Which of the following myocardial perfusion patterns suggest that the
patient has myocardial ischemia?
A) normal resting tc-MIBI, abnormal stress tc-MIBI
B) abnormal resting tc-MIBI, normal stress TI201
C) normal resting tc-MIBI, normal stress TI201
D) abnormal resting TI201, abnormal stress tc-MIBI
E) abnormal resting TI201, abnormal stress TI201 - 🧠 ANSWER ✔✔A)
normal resting tc-MIBI, abnormal stress tc-MIBI
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