NMTCB PET EXAM (Latest Update) Questions and
Verified Answers| 100% Correct| Grade A+
Which of the following positron-emitting nuclides has the shortest half-life?
(A) Rubidium-82
(B) Oxygen-15
(C) Nitrogen-13
(D) Carbon-11 - ANSWER-Rubidium-82
The cathode filament of the X-ray tube: - ANSWER-Emits electrons
An oncology patient referred for a positron emission tomography scan should fast prior to his/her
appointment for at least: - ANSWER-4 hours
When should Daily quality control checks on the PET scanner be performed: - ANSWER-Before the
patient is injected
Patients with malignant melanoma should be scanned with their arms: - ANSWER-Down
The presence of asbestos-related plaques, benign inflammatory pleuritis, tuberculous pleuritis, and
pleural effusion can result in - ANSWER-False-positive uptake in FDG-PET images of patients with
malignant mesothelioma
The earliest disposal of the decay-in-storage waste material is permitted if it was held for a minimum 10
half-lives and has decayed to less than: - ANSWER-Two times background levels
Organizing, problem solving, attention, and planning are controlled by the: - ANSWER-Frontal lobe of the
brain
The recommended time interval for PET imaging after biopsy is: - ANSWER-1 week
In the PET/CT acquisition, the CT component is performed for: - ANSWER-Attenuation correction
,A series of organized, involuntary, smooth waves of muscular contractions of the alimentary canal is
called: - ANSWER-Peristalsis
Standardized uptake value (SUV) measurements are performed on which images? - ANSWER-
Attenuation-corrected (AC) images only
Half life of Fluorine 18 - ANSWER-110 Minutes
Half life of Carbon-11 - ANSWER-20 Minutes
Half life of Nitrogen-13 - ANSWER-10 Minutes
Half life of Oxygen-15 - ANSWER-2 Minutes
False-negative PET scans in lung cancer imaging occur predominantly because of: - ANSWER-lesions that
are too small to be evaluated by PET
The principal measure of reducing radiation exposure to patients during PET/ CT examination is reduce
the: - ANSWER-Product of beam current and exposure time
Modifying kVp will also reduce radiation exposure, but to a lesser extent.
A minimally invasive surgical procedure used to detect the presence or absence of occult regional nodal
metastases in patients without clinically noticeable nodal disease is called: - ANSWER-sentinel node
biopsy
According to minimal performance standards, the FDG uptake period that is required to minimize
variability in SUV quantification should be at least: - ANSWER-60 min
Lung activity observed on F-18 FDG-PET/CT imaging is more prominent on which images? - ANSWER-
non-attenuation-corrected images
,Method most commonly applied to determine SUV - ANSWER-SUV max
CT and PET scans demonstrate different aspects of disease indicating regions with - ANSWER-Altered
metabolism (PET) and areas of structural change (CT)
If the pretest probability of disease is high and then a negative PET is more likely to be - ANSWER-False
negative
Multiple focal cortical and subcortical defects on FDG study indicate diagnosis of: - ANSWER-Vascular
dementia
The process of aligning images so that corresponding features can easily be related is called: - ANSWER-
Image registration
The concept of clinical SPECT/CT system can be described as - ANSWER-A dual-head scintillation camera
positioned in front of a CT scanner
A normal, physiological uptake of F-18 FDG in the stomach can be described as: - ANSWER-Proximal
stomach uptake is higher than distal stomach uptake
The recommended time interval for PET-FDG imaging after chemotherapy is: - ANSWER-> 10 days
An area of focal FDG uptake in the lungs, without corresponding finding on CT scan, most likely
represents: - ANSWER-An injected blood clot
A hyperinsulinemic state affects the diagnostic quality of FDG-PET imaging and it is typically associated
with: - ANSWER-Diffuse muscular and myocardial uptake
Malignant tumors of the chest wall include: - ANSWER-Chondrosarcoma, Osteosarcoma, Ewing sarcoma
A group of lung diseases characterized by chronic obstruction of lung airflow that interferes with normal
breathing and is not fully reversible is called: - ANSWER-Chronic obstructive pulmonary disease
, The beta-amyloid uptake can be assessed through positron emission tomography (PET) using the
radiopharmaceutical: - ANSWER-Carbon-11-labeled Pittsburgh Compound B (C-11 PiB)
Which of the following scintillators has the highest light output?
(A) LSO (lutetium oxyorthosilicate)
(B) NaI (Tl) (thallium-doped sodium iodide)
(C) BGO (bismuth germinate)
(D) GSO (gadolinium orthosilicate) - ANSWER-B - NaI (Tl)
The main organs of the digestive system include: - ANSWER-Pharynx, mouth, esophagus, stomach, and
small and large intestines
F-18 FDG-PET is considered as a superior modality, compared with CT, for evaluating posttreatment
response in lymphoma patients because of: - ANSWER-The ability to differentiate viable tumor from
fibrosis
Which type of non-Hodgkin lymphomas is most common? - ANSWER-Diffuse large B-cell lymphoma
The major limitation of PET in the head and neck imaging is: - ANSWER-Poor spatial resolution
The most common cell type found in lymphoid tissue is: - ANSWER-Lymphocyte
In order to achieve precise attenuation correction data for transmission scan they should be obtained
using: - ANSWER-Germanium-68
Hiatal hernias can cause large foci of increased F-18 FDG uptake in/at: - ANSWER-The gastroesophageal
junction
The lymphoma that has come back after it has been treated is called: - ANSWER-Recurrent
Verified Answers| 100% Correct| Grade A+
Which of the following positron-emitting nuclides has the shortest half-life?
(A) Rubidium-82
(B) Oxygen-15
(C) Nitrogen-13
(D) Carbon-11 - ANSWER-Rubidium-82
The cathode filament of the X-ray tube: - ANSWER-Emits electrons
An oncology patient referred for a positron emission tomography scan should fast prior to his/her
appointment for at least: - ANSWER-4 hours
When should Daily quality control checks on the PET scanner be performed: - ANSWER-Before the
patient is injected
Patients with malignant melanoma should be scanned with their arms: - ANSWER-Down
The presence of asbestos-related plaques, benign inflammatory pleuritis, tuberculous pleuritis, and
pleural effusion can result in - ANSWER-False-positive uptake in FDG-PET images of patients with
malignant mesothelioma
The earliest disposal of the decay-in-storage waste material is permitted if it was held for a minimum 10
half-lives and has decayed to less than: - ANSWER-Two times background levels
Organizing, problem solving, attention, and planning are controlled by the: - ANSWER-Frontal lobe of the
brain
The recommended time interval for PET imaging after biopsy is: - ANSWER-1 week
In the PET/CT acquisition, the CT component is performed for: - ANSWER-Attenuation correction
,A series of organized, involuntary, smooth waves of muscular contractions of the alimentary canal is
called: - ANSWER-Peristalsis
Standardized uptake value (SUV) measurements are performed on which images? - ANSWER-
Attenuation-corrected (AC) images only
Half life of Fluorine 18 - ANSWER-110 Minutes
Half life of Carbon-11 - ANSWER-20 Minutes
Half life of Nitrogen-13 - ANSWER-10 Minutes
Half life of Oxygen-15 - ANSWER-2 Minutes
False-negative PET scans in lung cancer imaging occur predominantly because of: - ANSWER-lesions that
are too small to be evaluated by PET
The principal measure of reducing radiation exposure to patients during PET/ CT examination is reduce
the: - ANSWER-Product of beam current and exposure time
Modifying kVp will also reduce radiation exposure, but to a lesser extent.
A minimally invasive surgical procedure used to detect the presence or absence of occult regional nodal
metastases in patients without clinically noticeable nodal disease is called: - ANSWER-sentinel node
biopsy
According to minimal performance standards, the FDG uptake period that is required to minimize
variability in SUV quantification should be at least: - ANSWER-60 min
Lung activity observed on F-18 FDG-PET/CT imaging is more prominent on which images? - ANSWER-
non-attenuation-corrected images
,Method most commonly applied to determine SUV - ANSWER-SUV max
CT and PET scans demonstrate different aspects of disease indicating regions with - ANSWER-Altered
metabolism (PET) and areas of structural change (CT)
If the pretest probability of disease is high and then a negative PET is more likely to be - ANSWER-False
negative
Multiple focal cortical and subcortical defects on FDG study indicate diagnosis of: - ANSWER-Vascular
dementia
The process of aligning images so that corresponding features can easily be related is called: - ANSWER-
Image registration
The concept of clinical SPECT/CT system can be described as - ANSWER-A dual-head scintillation camera
positioned in front of a CT scanner
A normal, physiological uptake of F-18 FDG in the stomach can be described as: - ANSWER-Proximal
stomach uptake is higher than distal stomach uptake
The recommended time interval for PET-FDG imaging after chemotherapy is: - ANSWER-> 10 days
An area of focal FDG uptake in the lungs, without corresponding finding on CT scan, most likely
represents: - ANSWER-An injected blood clot
A hyperinsulinemic state affects the diagnostic quality of FDG-PET imaging and it is typically associated
with: - ANSWER-Diffuse muscular and myocardial uptake
Malignant tumors of the chest wall include: - ANSWER-Chondrosarcoma, Osteosarcoma, Ewing sarcoma
A group of lung diseases characterized by chronic obstruction of lung airflow that interferes with normal
breathing and is not fully reversible is called: - ANSWER-Chronic obstructive pulmonary disease
, The beta-amyloid uptake can be assessed through positron emission tomography (PET) using the
radiopharmaceutical: - ANSWER-Carbon-11-labeled Pittsburgh Compound B (C-11 PiB)
Which of the following scintillators has the highest light output?
(A) LSO (lutetium oxyorthosilicate)
(B) NaI (Tl) (thallium-doped sodium iodide)
(C) BGO (bismuth germinate)
(D) GSO (gadolinium orthosilicate) - ANSWER-B - NaI (Tl)
The main organs of the digestive system include: - ANSWER-Pharynx, mouth, esophagus, stomach, and
small and large intestines
F-18 FDG-PET is considered as a superior modality, compared with CT, for evaluating posttreatment
response in lymphoma patients because of: - ANSWER-The ability to differentiate viable tumor from
fibrosis
Which type of non-Hodgkin lymphomas is most common? - ANSWER-Diffuse large B-cell lymphoma
The major limitation of PET in the head and neck imaging is: - ANSWER-Poor spatial resolution
The most common cell type found in lymphoid tissue is: - ANSWER-Lymphocyte
In order to achieve precise attenuation correction data for transmission scan they should be obtained
using: - ANSWER-Germanium-68
Hiatal hernias can cause large foci of increased F-18 FDG uptake in/at: - ANSWER-The gastroesophageal
junction
The lymphoma that has come back after it has been treated is called: - ANSWER-Recurrent
