CT - Computed Tomography || 100% Error-free.
Each 1.0% change in contrast between adjacent objects amount to a difference in pixel value of
approximately how many HU? correct answers 10 HU
An IV contrast enhanced specialized CT evaluation of the small bowel after the oral
administration of a low density (0.1%) barium sulfate solution is termed: correct answers CT
Enterography
What is the maximum number of line pairs per centimeter (lp/cm) the smooth algorithm can
demonstrate? correct answers 8.1
A patient is scheduled for an intravenous iodinated contrast-enhanced CT scan of the kidneys.
Prior to injection the involved medical professional personnel should examine recently measured
laboratory values for which of the following?
(1) CBC
(2) Creatinine
(3) PT correct answers Creatinine:
The serum creatinine level is a laboratory value used to measure renal function, and abnormally
elevated values are often signs of renal failure.
Increasing the detector pitch during a spiral CT exam adversely affects the spatial resolution
along which axis? correct answers Z-axis:
Spatial resolution along the Z-axis is decreased as detector pitch is increased.
Which of the following vessels would NOT be used as a site for the injection of iodinated
contrast material?
(1) Cephalic vein
(2) Brachial artery
(3) Antecubital vein
(4) Basilic Vein correct answers (2) Brachial artery:
Intraarterial injections of contrast material are not routinely preformed for CT examinations.
Which of the following laboratory values is used to measure the coagulation ability of a patient
prior to an invasive CT study?
(1) PTT
(2) Hematocrit
(3) PT correct answers 1 & 3:
, Prothrombin Time (PT) & Partial Thromboplastin Time each attempt to detect deficiencies in the
various clotting factors.
The period of peak hepatic parenchymal enhancement following rapid bolus injection of
iodinated contrast is termed the: correct answers Portal venous phase
The primary indication for a non-contrast cardiac MDCT examination is: correct answers
Coronary artery calcium quantification:
Coronary artery calcium (CAC) quantification is for the assessment of atherosclerotic disease.
The excretion half-time of intravenous iodinated contrast media in a patient with normal renal
function is between: correct answers 1 and 2 hours:
Excretion half-time is a value describing the amount of time necessary for 50% of the contrast
media to be filtered by the renal system.
Following a CTA of the chest for pulmonary embolism, an additional acquisition may be
preformed through the lower extremities to evaluate for: correct answers Deep vein thrombosis
(DVT)
DVT, the formation of blood clots in the distal blood vessels, is common in the popliteal and
femoral veins of the lower extremities
Which of the following stages of IV contrast agent administration, provides the best gastric and
intestinal wall enhancement:
(1) Early arterial
(2) Corticomedullary
(3) Portal Venous
(4) Excretory correct answers (3) Portal Venous
Which of the following units is used to quantify effective dose?
(1) Roentgens (R)
(2) Grays (Gy)
(3) Sieverts (Sv)
(4) Curies (Ci) correct answers (3) Sieverts (Sv)
Effective does approximates the relative risk from exposure to ionizing radiation and is based on
the radiosensitivity of a given tissue type.
Evaluation of the venous vascular structures of the brain is known as: correct answers CT
Venography (CTV)
Each 1.0% change in contrast between adjacent objects amount to a difference in pixel value of
approximately how many HU? correct answers 10 HU
An IV contrast enhanced specialized CT evaluation of the small bowel after the oral
administration of a low density (0.1%) barium sulfate solution is termed: correct answers CT
Enterography
What is the maximum number of line pairs per centimeter (lp/cm) the smooth algorithm can
demonstrate? correct answers 8.1
A patient is scheduled for an intravenous iodinated contrast-enhanced CT scan of the kidneys.
Prior to injection the involved medical professional personnel should examine recently measured
laboratory values for which of the following?
(1) CBC
(2) Creatinine
(3) PT correct answers Creatinine:
The serum creatinine level is a laboratory value used to measure renal function, and abnormally
elevated values are often signs of renal failure.
Increasing the detector pitch during a spiral CT exam adversely affects the spatial resolution
along which axis? correct answers Z-axis:
Spatial resolution along the Z-axis is decreased as detector pitch is increased.
Which of the following vessels would NOT be used as a site for the injection of iodinated
contrast material?
(1) Cephalic vein
(2) Brachial artery
(3) Antecubital vein
(4) Basilic Vein correct answers (2) Brachial artery:
Intraarterial injections of contrast material are not routinely preformed for CT examinations.
Which of the following laboratory values is used to measure the coagulation ability of a patient
prior to an invasive CT study?
(1) PTT
(2) Hematocrit
(3) PT correct answers 1 & 3:
, Prothrombin Time (PT) & Partial Thromboplastin Time each attempt to detect deficiencies in the
various clotting factors.
The period of peak hepatic parenchymal enhancement following rapid bolus injection of
iodinated contrast is termed the: correct answers Portal venous phase
The primary indication for a non-contrast cardiac MDCT examination is: correct answers
Coronary artery calcium quantification:
Coronary artery calcium (CAC) quantification is for the assessment of atherosclerotic disease.
The excretion half-time of intravenous iodinated contrast media in a patient with normal renal
function is between: correct answers 1 and 2 hours:
Excretion half-time is a value describing the amount of time necessary for 50% of the contrast
media to be filtered by the renal system.
Following a CTA of the chest for pulmonary embolism, an additional acquisition may be
preformed through the lower extremities to evaluate for: correct answers Deep vein thrombosis
(DVT)
DVT, the formation of blood clots in the distal blood vessels, is common in the popliteal and
femoral veins of the lower extremities
Which of the following stages of IV contrast agent administration, provides the best gastric and
intestinal wall enhancement:
(1) Early arterial
(2) Corticomedullary
(3) Portal Venous
(4) Excretory correct answers (3) Portal Venous
Which of the following units is used to quantify effective dose?
(1) Roentgens (R)
(2) Grays (Gy)
(3) Sieverts (Sv)
(4) Curies (Ci) correct answers (3) Sieverts (Sv)
Effective does approximates the relative risk from exposure to ionizing radiation and is based on
the radiosensitivity of a given tissue type.
Evaluation of the venous vascular structures of the brain is known as: correct answers CT
Venography (CTV)
