ST:10(PET/CT) Flashcards
Which of the following positron emitting radionuclides is ONLY cyclotron produced:
a. Nitrogen-13
b. Gallium-68
c. Rubidium-82
d. Copper-62
a. Nitrogen-13
Property of PET detectors that allows them faster timing signal for coincidence detection and to work at high count rates is called:
a. The stopping power
b. The decay constant
c. Energy resolution
d. The light output
b. The decay constant
A substitution radioactive for nonradioactive element in a biologically active PET tracer molecule without altering its biological properties is called:
a. Hot for hot substitution
b. Hot for cold substitution
c. Cold for hot substitution
d. Cold for cold substitution
b. Hot for cold substitution
The inverse of the mean distance traveled by photons before they deposit energy in the crystal is called:
a. Light output
b. Decay constant
c. Energy resolution
d. Stopping power
d. Stopping power
The exposure rate of ac activity of 1 millicurie measured at 1 centimeter is called:
a. Roentgen man equivalent (REM)
b. Total effective dose equivalent (TEDE)
c. The exposure rate constant (ERC)
d. Kilobequerel (kBq)
c. The exposure rate constant (ERC)
Diaphragmatic crus F-18 FDG uptake can be seen in patients with:
a. Increased respiratory effort
b. Tachycardia
c. Malignancy
d. Anxiety
a. Increased respiratory effort
Administration of water-equivalent contrast agent when performing PET/CT imaging:
a. Underestimates SUV
b. Produces streaking artifact
c. Has no effect of SUV
d. Overestimates SUV
c. Has no effect of SUV
DNA synthesis is a measure of cellular:
a. Apoptosis
b. Proliferation
c. Mutation
d. Metabolism
b. Proliferation
Brain metabolism and blood flow are increased at the site of onset of the seizure in the:
a. Inter and intraictal states
b. Neither inter and intraictal states
c. Interictal state
d. Intraictal state
d. Intraictal state
The pattern of diffuse hypermetabolism in the skeleton and the spleen on PET FDG study is most likely caused by:
a. Excessive exercise
b. Bone marrow hyperplasia
c. Prolonged fasting
d. Bone metastases
b. Bone marrow hyperplasia
Stunned or hibernating myocardium is:
a. Dysfunctional but viable
b. Functional
c. Nonviable
d. Dysfunctional and nonviable
a. Dysfunctional but viable
Bilateral symmetric decreased FDG uptake in the temporoparietal region of the brain is the prevailing pattern observed in:
a. Vascular dementia
b. Alzheimers disease
c. Dementia with lewy bodies
d. Pick disease
b. Alzheimer’s disease
Which of the following types of non-Hodgkins lymphomas is most common:
a. Burkitts lymphoma
b. Diffused large B cell lymphoma
c. Lymphoblastic lymphoma
d. Anaplastic T cell lymphoma
b. Diffused large B cell lymphoma
Rb-82 is a monovalent catiotic analog of potassium and has a biologic activity similar to:
a. Tl-201
b. F-18
c. Tc-99m
d. Ga-67
a. Tl-201
Which of the following radionuclides commonly used in PET imaging has the lowest positron range in water:
a. Fluorine-18
b. Carbon-11
c. Nitrogen-13
d. Oxygen-15
a. Fluorine-18
QC testing for PET agents that involves decay analysis in a dose calibrator for a defined period of time is called:
a. Specific activity analysis
b. Radiochemical purity
c. Bacterial endotoxin testing
d. Radionuclidic identity
d. Radionuclidic identity
Truncation artifacts in PET/CT imaging are produced by:
a. Difference in size of FOV between PET and the CT
b. Beds overlapping
c. Contrast medium
d. Difference in scanning time between PET and CT
a. Difference in size of FOV between PET and the CT
The first PET radiopharmaceutical to receive USDA approval in 1989 was:
a. F-18 Fluoride
b. F-18 FDG
c. N-13 Ammonia
d. Rb-82
d. Rb-82
Which of the following radionuclides commonly used in PET images has the highest positron energy:
a. Nitrogen-13
b. Oxygen-15
c. Fluorine-18
d. Carbon-11
b. Oxygen-15
Ovarian uptake of F-18 FDG in a postmenopausal patient indicates:
a. Normal finding
b. Malignancy
c. Pregnancy
d. Ovulation
b. Malignancy
An area of focal FDG uptake in the lungs, without corresponding findings on CT most likely represents:
a. An injected blood clot
b. Rib fracture
c. Radiation necrosis
d. Pulmonary nodule
a. An injected blood clot
Linear attenuation coefficient determines the scintillator:
a. Energy resolution
b. Stopping power
c. Light output
d. Decay constant
b. Stopping power
The sum of the weighted equivalent doses in all the tissues and organs of the body is called:
a. Whole body dose
b. Effective dose
c. Shallow dose equivalent
d. Committed dose equivalent
b. Effective dose
Multiple focal cortical and subcortical defects on FDG study indicates diagnosis of:
a. Alzheimer’s disease
b. Vascular dementia
c. Parkinson’s disease
d. Radiation necrosis
b. Vascular dementia