MOCK CT EXAM 1 QUESTIONS WITH 100%
COMPLETE SOLUTIONS
What image axis in CT extends longitudinally through the scanner? - VERIFIED ANSWER✔✔-z-axis
What IV contrast injection protocol enables maximum uptake and enhancement of spinal meningiomas? -
VERIFIED ANSWER✔✔-150 mL volume, 3 mL/sec, 80 second delay
What is the primary objective of a CT guided biopsy of a pulmonary nodule? - VERIFIED ANSWER✔✔-retrieve
a tissue sample for histology
What way does increasing the mA of a CT procedure affect the energy of characteristic x-ray photons? -
VERIFIED ANSWER✔✔-increasing mA has no effect on the characteristic photon energy
What device stores the unprocessed scan data from CT imaging procedures? - VERIFIED ANSWER✔✔-CT
scanner host computer
What condition would most likely warrant a CT iliofemoral runoff scan? - VERIFIED ANSWER✔✔-tibial artery
stenosis
What radiation dose quantity is significantly influenced by the overall length of a CT scan? - VERIFIED
ANSWER✔✔-Dose-length product (DLP)
What intervention may be required for a patient who experiences a large pneumothorax during a CT-guided
biopsy of the chest? - VERIFIED ANSWER✔✔-chest-tube placement
What condition is known to cause cardiac blood flow deficits and myocardial infarction? - VERIFIED
ANSWER✔✔-coronary artery disease
What reconstruction parameter produces maximum spatial resolution when performing CT imaging of the internal
auditory canals? - VERIFIED ANSWER✔✔-.625 mm slice thickness in bone algorithm
What surgery is likely to require a decrease in the volume of IV contrast used for a CT procedure? - VERIFIED
ANSWER✔✔-renal transplant
What pathology is suspected when CT imaging if the soft tissues of the neck demonstrates a large, round filling
defect within the internal jugular vein? - VERIFIED ANSWER✔✔-thrombosis
A patient scheduled for a CT-guided biopsy of the liver has a platelet count below the normal range. What risk is
associated with a low platelet count during this procedure? - VERIFIED ANSWER✔✔-increased risk of
inadequate blood clotting
A patient should be instructed to avoid swallowing during the scan phase of what procedure? - VERIFIED
ANSWER✔✔-CTA head and neck
What muscle group is observed in CT imaging on the posterior surface of the vertebral column? - VERIFIED
ANSWER✔✔-erector spinae
What type of brain hemorrhage herniates into the brain with a convex shape? - VERIFIED ANSWER✔✔-
epidural hemorrhage
What contrast injection method should be used for initial imaging of an intracranial hemorrhage? - VERIFIED
ANSWER✔✔-non-contrast
, The primary advantage of volumetric scanning and CT over other data acquisition methods is the ability to -
VERIFIED ANSWER✔✔-capture an entire body section with no table movement
What radiation dose quantity corresponds to the risk of radiation-induced carcinogenesis from a medical imaging
procedure? - VERIFIED ANSWER✔✔-effective dose
A CT scan of the head with IV contrast is requested to evaluate a female patient with a known cerebral
arteriovenous malformation (AVM). The patient's renal function tests are normal. What should the technologist
do before proceeding with the scan? - VERIFIED ANSWER✔✔-request that the scan should be ordered as an
angiography study
What is the maximum photon energy produced by the Bremsstrahlung interaction when the x-ray tube potential is
set to 140 kVp? - VERIFIED ANSWER✔✔-140 kiloelectron volts (keV)
Due to the risk of contrast-induced nephropathy, what should not be performed on the same day as a CT with IV
contrast? - VERIFIED ANSWER✔✔-antegrade pyelography and urography
In what way do compton scattering interactions affect the image quality of a CT scan? - VERIFIED
ANSWER✔✔-decreased contrast resolution
What method of image reconstruction in CT allows the operator to reduce the patient exposure while still
maintaining optimal image quality? - VERIFIED ANSWER✔✔-iterative reconstruction
Failing to remove a patient's metallic belt buckle prior to CT imaging of the pelvis may result in what adverse
effects? - VERIFIED ANSWER✔✔-increased patient dose, streak artifact
What exposure setting will produce an x-ray beam with the highest beam quantity? - VERIFIED ANSWER✔✔-
140 kVp and 300 mA
The size of a suspicious lesion measures 27 mm on an axial CT image. How does this measurement on the image
correspond to the actual size of the lesion within the patient? - VERIFIED ANSWER✔✔-the actual lesion size is
27 mm
According to the inverse square law, if the SSD is increased by a factor of 3, the skin dose will: - VERIFIED
ANSWER✔✔-decrease by a factor of 3^2
A hospitalist orders a CT-guided aspiration on a mentally competent inpatient. What action constitutes informed
consent to the CT procedure? - VERIFIED ANSWER✔✔-the patient has a formal conversation with the provider
about the diagnosis, risks, and outcomes
An emergency CT of the abdomen and pelvis is requested on a pregnant patient. What protocol changes can be
made to reduce the dose to the embryo/fetus while still maintaining diagnostic image quality? - VERIFIED
ANSWER✔✔-decrease mA and kVp
What imaging method may be used to reduce motion artifacts while performing a CT scan of the coronary
arteries? - VERIFIED ANSWER✔✔-using electrocardiography (ECG) gating
What aspect of helical data acquisition and reconstruction degrades the CT image quality of helical scanning
compared to other scanning methods? - VERIFIED ANSWER✔✔-helical scanning requires interpolation
What factors are important patient considerations that may limit the ability to perform CTA of the chest on a
bariatric patient? - VERIFIED ANSWER✔✔-weight limit of the scanner table, width of the gantry, patency of IV
catheter access
What term describes the streak artifact radiating from the interface of high-contrast objects within a CT image? -
VERIFIED ANSWER✔✔-edge gradient artifact
COMPLETE SOLUTIONS
What image axis in CT extends longitudinally through the scanner? - VERIFIED ANSWER✔✔-z-axis
What IV contrast injection protocol enables maximum uptake and enhancement of spinal meningiomas? -
VERIFIED ANSWER✔✔-150 mL volume, 3 mL/sec, 80 second delay
What is the primary objective of a CT guided biopsy of a pulmonary nodule? - VERIFIED ANSWER✔✔-retrieve
a tissue sample for histology
What way does increasing the mA of a CT procedure affect the energy of characteristic x-ray photons? -
VERIFIED ANSWER✔✔-increasing mA has no effect on the characteristic photon energy
What device stores the unprocessed scan data from CT imaging procedures? - VERIFIED ANSWER✔✔-CT
scanner host computer
What condition would most likely warrant a CT iliofemoral runoff scan? - VERIFIED ANSWER✔✔-tibial artery
stenosis
What radiation dose quantity is significantly influenced by the overall length of a CT scan? - VERIFIED
ANSWER✔✔-Dose-length product (DLP)
What intervention may be required for a patient who experiences a large pneumothorax during a CT-guided
biopsy of the chest? - VERIFIED ANSWER✔✔-chest-tube placement
What condition is known to cause cardiac blood flow deficits and myocardial infarction? - VERIFIED
ANSWER✔✔-coronary artery disease
What reconstruction parameter produces maximum spatial resolution when performing CT imaging of the internal
auditory canals? - VERIFIED ANSWER✔✔-.625 mm slice thickness in bone algorithm
What surgery is likely to require a decrease in the volume of IV contrast used for a CT procedure? - VERIFIED
ANSWER✔✔-renal transplant
What pathology is suspected when CT imaging if the soft tissues of the neck demonstrates a large, round filling
defect within the internal jugular vein? - VERIFIED ANSWER✔✔-thrombosis
A patient scheduled for a CT-guided biopsy of the liver has a platelet count below the normal range. What risk is
associated with a low platelet count during this procedure? - VERIFIED ANSWER✔✔-increased risk of
inadequate blood clotting
A patient should be instructed to avoid swallowing during the scan phase of what procedure? - VERIFIED
ANSWER✔✔-CTA head and neck
What muscle group is observed in CT imaging on the posterior surface of the vertebral column? - VERIFIED
ANSWER✔✔-erector spinae
What type of brain hemorrhage herniates into the brain with a convex shape? - VERIFIED ANSWER✔✔-
epidural hemorrhage
What contrast injection method should be used for initial imaging of an intracranial hemorrhage? - VERIFIED
ANSWER✔✔-non-contrast
, The primary advantage of volumetric scanning and CT over other data acquisition methods is the ability to -
VERIFIED ANSWER✔✔-capture an entire body section with no table movement
What radiation dose quantity corresponds to the risk of radiation-induced carcinogenesis from a medical imaging
procedure? - VERIFIED ANSWER✔✔-effective dose
A CT scan of the head with IV contrast is requested to evaluate a female patient with a known cerebral
arteriovenous malformation (AVM). The patient's renal function tests are normal. What should the technologist
do before proceeding with the scan? - VERIFIED ANSWER✔✔-request that the scan should be ordered as an
angiography study
What is the maximum photon energy produced by the Bremsstrahlung interaction when the x-ray tube potential is
set to 140 kVp? - VERIFIED ANSWER✔✔-140 kiloelectron volts (keV)
Due to the risk of contrast-induced nephropathy, what should not be performed on the same day as a CT with IV
contrast? - VERIFIED ANSWER✔✔-antegrade pyelography and urography
In what way do compton scattering interactions affect the image quality of a CT scan? - VERIFIED
ANSWER✔✔-decreased contrast resolution
What method of image reconstruction in CT allows the operator to reduce the patient exposure while still
maintaining optimal image quality? - VERIFIED ANSWER✔✔-iterative reconstruction
Failing to remove a patient's metallic belt buckle prior to CT imaging of the pelvis may result in what adverse
effects? - VERIFIED ANSWER✔✔-increased patient dose, streak artifact
What exposure setting will produce an x-ray beam with the highest beam quantity? - VERIFIED ANSWER✔✔-
140 kVp and 300 mA
The size of a suspicious lesion measures 27 mm on an axial CT image. How does this measurement on the image
correspond to the actual size of the lesion within the patient? - VERIFIED ANSWER✔✔-the actual lesion size is
27 mm
According to the inverse square law, if the SSD is increased by a factor of 3, the skin dose will: - VERIFIED
ANSWER✔✔-decrease by a factor of 3^2
A hospitalist orders a CT-guided aspiration on a mentally competent inpatient. What action constitutes informed
consent to the CT procedure? - VERIFIED ANSWER✔✔-the patient has a formal conversation with the provider
about the diagnosis, risks, and outcomes
An emergency CT of the abdomen and pelvis is requested on a pregnant patient. What protocol changes can be
made to reduce the dose to the embryo/fetus while still maintaining diagnostic image quality? - VERIFIED
ANSWER✔✔-decrease mA and kVp
What imaging method may be used to reduce motion artifacts while performing a CT scan of the coronary
arteries? - VERIFIED ANSWER✔✔-using electrocardiography (ECG) gating
What aspect of helical data acquisition and reconstruction degrades the CT image quality of helical scanning
compared to other scanning methods? - VERIFIED ANSWER✔✔-helical scanning requires interpolation
What factors are important patient considerations that may limit the ability to perform CTA of the chest on a
bariatric patient? - VERIFIED ANSWER✔✔-weight limit of the scanner table, width of the gantry, patency of IV
catheter access
What term describes the streak artifact radiating from the interface of high-contrast objects within a CT image? -
VERIFIED ANSWER✔✔-edge gradient artifact
