Michigan Nuclear Medicine Advanced
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. Which radionuclide is most commonly used in myocardial perfusion
imaging due to its favorable half-life and photon energy?
A. Gallium-67
B. Iodine-131
C. Technetium-99m
D. Thallium-201
Technetium-99m is preferred for myocardial perfusion imaging because it
has a short half-life of 6 hours and emits gamma photons at 140 keV,
providing optimal imaging quality with reduced patient radiation
exposure.
2. The principle behind PET imaging relies on:
A. Detection of spontaneous gamma emissions
B. Annihilation of positrons and electrons producing coincident
photons
C. Absorption of beta particles in a scintillator
D. Magnetic resonance of hydrogen nuclei
PET imaging uses positron-emitting radionuclides. When a positron collides
with an electron, annihilation occurs, producing two 511 keV photons
,traveling in opposite directions, which are detected simultaneously to
construct images.
3. Which of the following is a receptor-based radiopharmaceutical used
primarily in neuroendocrine tumor imaging?
A. Technetium-99m MDP
B. Gallium-68 DOTATATE
C. Fluorine-18 FDG
D. Iodine-123 MIBG
Gallium-68 DOTATATE binds to somatostatin receptors, which are
overexpressed in many neuroendocrine tumors, enabling highly specific
PET imaging.
4. In bone scintigraphy, the mechanism of radiotracer localization is:
A. Passive diffusion into bone marrow
B. Active transport into osteoclasts
C. Chemisorption onto hydroxyapatite crystals in bone matrix
D. Binding to collagen fibers
Radiopharmaceuticals like Technetium-99m MDP localize in bone via
chemisorption onto hydroxyapatite crystals, especially in areas of high
osteoblastic activity, allowing detection of lesions.
5. The effective dose to a patient from a standard dose of Tc-99m
sestamibi for cardiac imaging is approximately:
A. 0.5 mSv
B. 1 mSv
C. 10 mSv
D. 50 mSv
The typical administered activity of Tc-99m sestamibi results in an effective
dose of around 10 mSv, balancing diagnostic utility with patient safety.
6. Which of the following is the most significant advantage of SPECT over
planar scintigraphy?
A. Faster acquisition
, B. Lower radiation dose
C. Three-dimensional imaging and improved contrast resolution
D. Elimination of attenuation artifacts
SPECT provides three-dimensional imaging by rotating the gamma camera
around the patient, improving lesion localization and contrast resolution
compared to planar imaging.
7. Which radionuclide is commonly used for thyroid imaging with a
gamma camera?
A. Technetium-99m MDP
B. Iodine-123
C. Gallium-68
D. Fluorine-18
Iodine-123 is preferred for thyroid imaging because it is actively taken up
by thyroid tissue and emits gamma rays suitable for high-quality imaging
while minimizing radiation dose.
8. The liver-spleen scan using Tc-99m sulfur colloid primarily
demonstrates which physiological process?
A. Hepatocyte metabolism
B. Reticuloendothelial system activity
C. Bile excretion
D. Portal venous perfusion
Tc-99m sulfur colloid is phagocytosed by Kupffer cells in the liver and
macrophages in the spleen, reflecting reticuloendothelial system function.
9. During renal scintigraphy, which parameter is used to assess
differential renal function?
A. Glomerular filtration rate
B. Relative uptake of radiotracer by each kidney
C. Plasma clearance of tracer
D. Urinary excretion half-life
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. Which radionuclide is most commonly used in myocardial perfusion
imaging due to its favorable half-life and photon energy?
A. Gallium-67
B. Iodine-131
C. Technetium-99m
D. Thallium-201
Technetium-99m is preferred for myocardial perfusion imaging because it
has a short half-life of 6 hours and emits gamma photons at 140 keV,
providing optimal imaging quality with reduced patient radiation
exposure.
2. The principle behind PET imaging relies on:
A. Detection of spontaneous gamma emissions
B. Annihilation of positrons and electrons producing coincident
photons
C. Absorption of beta particles in a scintillator
D. Magnetic resonance of hydrogen nuclei
PET imaging uses positron-emitting radionuclides. When a positron collides
with an electron, annihilation occurs, producing two 511 keV photons
,traveling in opposite directions, which are detected simultaneously to
construct images.
3. Which of the following is a receptor-based radiopharmaceutical used
primarily in neuroendocrine tumor imaging?
A. Technetium-99m MDP
B. Gallium-68 DOTATATE
C. Fluorine-18 FDG
D. Iodine-123 MIBG
Gallium-68 DOTATATE binds to somatostatin receptors, which are
overexpressed in many neuroendocrine tumors, enabling highly specific
PET imaging.
4. In bone scintigraphy, the mechanism of radiotracer localization is:
A. Passive diffusion into bone marrow
B. Active transport into osteoclasts
C. Chemisorption onto hydroxyapatite crystals in bone matrix
D. Binding to collagen fibers
Radiopharmaceuticals like Technetium-99m MDP localize in bone via
chemisorption onto hydroxyapatite crystals, especially in areas of high
osteoblastic activity, allowing detection of lesions.
5. The effective dose to a patient from a standard dose of Tc-99m
sestamibi for cardiac imaging is approximately:
A. 0.5 mSv
B. 1 mSv
C. 10 mSv
D. 50 mSv
The typical administered activity of Tc-99m sestamibi results in an effective
dose of around 10 mSv, balancing diagnostic utility with patient safety.
6. Which of the following is the most significant advantage of SPECT over
planar scintigraphy?
A. Faster acquisition
, B. Lower radiation dose
C. Three-dimensional imaging and improved contrast resolution
D. Elimination of attenuation artifacts
SPECT provides three-dimensional imaging by rotating the gamma camera
around the patient, improving lesion localization and contrast resolution
compared to planar imaging.
7. Which radionuclide is commonly used for thyroid imaging with a
gamma camera?
A. Technetium-99m MDP
B. Iodine-123
C. Gallium-68
D. Fluorine-18
Iodine-123 is preferred for thyroid imaging because it is actively taken up
by thyroid tissue and emits gamma rays suitable for high-quality imaging
while minimizing radiation dose.
8. The liver-spleen scan using Tc-99m sulfur colloid primarily
demonstrates which physiological process?
A. Hepatocyte metabolism
B. Reticuloendothelial system activity
C. Bile excretion
D. Portal venous perfusion
Tc-99m sulfur colloid is phagocytosed by Kupffer cells in the liver and
macrophages in the spleen, reflecting reticuloendothelial system function.
9. During renal scintigraphy, which parameter is used to assess
differential renal function?
A. Glomerular filtration rate
B. Relative uptake of radiotracer by each kidney
C. Plasma clearance of tracer
D. Urinary excretion half-life
