CT IMAGING PROCEDURES CORE EXAM QUESTIONS WITH
ANSWERS GRADED A+ 2025/2026
During CT perfusion studies, the measured time (in seconds) required for blood to pass
through an area of brain tissue is termed the:
A. cerebral blood flow (CBF).
B. ejection fraction (EF).
C. mean transit time (MTT).
D. cerebral blood volume (CBV). - C
During CT perfusion studies, the quantity of blood (in mL) contained within 100 g of
brain tissue is termed the:
A. mean transit time (MTT).
B. cerebral blood flow (CBF).
C. cerebral blood volume (CBV).
D. percent-washout value (PWV). - C
Normal range for cerebral blood volume?
A. 0.6 to 1.0 mL/100 g.
B. 4 to 5 mL/100 g.
C. 15 to 19 mL/100 g.
D. 30 to 40 mL/100 g. - B
The normal range of cerebral blood flow (CBF) through 100 g of the brain's gray matter
is:
A. 2 to 4 mL/100 g/min.
B. 15 to 25 mL/100 g/min.
C. 50 to 60 mL/100 g/min.
D. 110 to 135 mL/100 g/min. - C
High-resolution computed tomography (HRCT) of the chest incorporates which of the
following protocols?
A. 10-mm sections, standard algorithm
B. 10-mm sections, bone algorithm
C. 3-mm sections, standard algorithm
D. 1-mm sections, bone algorithm - D. High-resolution computed tomography (HRCT) of
the chest is used to examine diffuse pulmonary disease. This technique offers excellent
visualization of the lungs, airways, and pulmonary hilum. HRCT involves the use of
narrow sections (1 to 3 mm) and a high-resolution algorithm.
The water-soluble oral contrast agents used for CT scans of the abdomen and pelvis
should contain approximately __________ iodine.
A. 2% to 5%
B. 8% to 12%
C. 15% to 20%
D. 25% to 40% - A
,If not contraindicated, administration of sublingual nitroglycerine immediately before the
CTA procedure can improve __________ resolution by dilating the coronary vessels -
spatial
The period of peak hepatic parenchymal enhancement following rapid bolus injection of
iodinated contrast is termed the:
A. equilibrium phase.
B. portal venous phase.
C. arterial phase.
D. nephrographic phase. - B
Portal venous phase imaging of the liver is used to optimally demonstrate which of the
following?
A. Hepatocellular carcinoma (HCC)
B. Hypovascular hepatic metastases
C. Hepatic artery aneurysm
D. Focal nodular hyperplasia (FNH) - B
After initiation of rapid bolus administration of an iodinated contrast agent, the
corticomedullary phase of renal contrast enhancement occurs at approximately:
A. 20 to 25 seconds.
B. 30 to 40 seconds.
C. 70 to 90 seconds.
D. 3 to 5 minutes. - B
This phase is important for the assessment of the hepatic arterial supply. Important in
cases of preoperative planning for resection, transplantation, or placement of a
chemotherapy infusion pump
A. equilibrium phase.
B. portal venous phase.
C. arterial phase
D. early arterial phase - D
This phase is for optimal visualization of hypervascular hepatic lesions such as
hemangioma and HCC.
A. equilibrium phase.
B. portal venous phase.
C. arterial phase
D. early arterial phase - C
for evaluation of the maximally enhanced hepatic parenchyma and demonstration of
hypovascular lesions such as hepatic metastases.
A. equilibrium phase.
B. portal venous phase.
, C. arterial phase
D. early arterial phase - B
for demonstration of hemangioma fill-in, & FNH central scar
A. delayed phase
B. portal venous phase.
C. arterial phase
D. early arterial phase - A
Which of the following phases of renal contrast enhancement provides maximum
sensitivity for parenchymal lesions?
A. Early arterial
B. Corticomedullary
C. Nephrographic
D. Excretory - C. During the nephrographic phase, enhancement between renal cortex
and medulla reaches equilibrium, providing optimal sensitivity for parenchymal lesions.
The nephrographic phase occurs between 70 and 90 seconds after the start of injection.
Which of the following phases of IV contrast agent administration provides the best
gastric and intestinal wall enhancement?
A. Early arterial
B. Corticomedullary
C. Portal venous
D. Excretory - C. For indications involving the GI tract, acquisition is typically obtained
during the portal venous phase for optimal gastric and intestinal wall enhancement.
To generate straight axial MPR's of a disk, the spine can be scanned helically and a
sagittal view is used to angle slices ___________ to the plane of a specific disc space.
A. Perpendicular
B. Parallel
C. Oblique - B
Clinical indications for spinal CT with IV contrast include all the following except:
A. Spondylolisthesis
B. Metastatic tissue
C. Osteomyelitis
D. H/o prior spinal surgery - A
The proper scan direction for CT exams of the face is:
A. Caudal-cranial
B. Cranial-caudal
C. Superior- Inferior
D. Left-right - A
ANSWERS GRADED A+ 2025/2026
During CT perfusion studies, the measured time (in seconds) required for blood to pass
through an area of brain tissue is termed the:
A. cerebral blood flow (CBF).
B. ejection fraction (EF).
C. mean transit time (MTT).
D. cerebral blood volume (CBV). - C
During CT perfusion studies, the quantity of blood (in mL) contained within 100 g of
brain tissue is termed the:
A. mean transit time (MTT).
B. cerebral blood flow (CBF).
C. cerebral blood volume (CBV).
D. percent-washout value (PWV). - C
Normal range for cerebral blood volume?
A. 0.6 to 1.0 mL/100 g.
B. 4 to 5 mL/100 g.
C. 15 to 19 mL/100 g.
D. 30 to 40 mL/100 g. - B
The normal range of cerebral blood flow (CBF) through 100 g of the brain's gray matter
is:
A. 2 to 4 mL/100 g/min.
B. 15 to 25 mL/100 g/min.
C. 50 to 60 mL/100 g/min.
D. 110 to 135 mL/100 g/min. - C
High-resolution computed tomography (HRCT) of the chest incorporates which of the
following protocols?
A. 10-mm sections, standard algorithm
B. 10-mm sections, bone algorithm
C. 3-mm sections, standard algorithm
D. 1-mm sections, bone algorithm - D. High-resolution computed tomography (HRCT) of
the chest is used to examine diffuse pulmonary disease. This technique offers excellent
visualization of the lungs, airways, and pulmonary hilum. HRCT involves the use of
narrow sections (1 to 3 mm) and a high-resolution algorithm.
The water-soluble oral contrast agents used for CT scans of the abdomen and pelvis
should contain approximately __________ iodine.
A. 2% to 5%
B. 8% to 12%
C. 15% to 20%
D. 25% to 40% - A
,If not contraindicated, administration of sublingual nitroglycerine immediately before the
CTA procedure can improve __________ resolution by dilating the coronary vessels -
spatial
The period of peak hepatic parenchymal enhancement following rapid bolus injection of
iodinated contrast is termed the:
A. equilibrium phase.
B. portal venous phase.
C. arterial phase.
D. nephrographic phase. - B
Portal venous phase imaging of the liver is used to optimally demonstrate which of the
following?
A. Hepatocellular carcinoma (HCC)
B. Hypovascular hepatic metastases
C. Hepatic artery aneurysm
D. Focal nodular hyperplasia (FNH) - B
After initiation of rapid bolus administration of an iodinated contrast agent, the
corticomedullary phase of renal contrast enhancement occurs at approximately:
A. 20 to 25 seconds.
B. 30 to 40 seconds.
C. 70 to 90 seconds.
D. 3 to 5 minutes. - B
This phase is important for the assessment of the hepatic arterial supply. Important in
cases of preoperative planning for resection, transplantation, or placement of a
chemotherapy infusion pump
A. equilibrium phase.
B. portal venous phase.
C. arterial phase
D. early arterial phase - D
This phase is for optimal visualization of hypervascular hepatic lesions such as
hemangioma and HCC.
A. equilibrium phase.
B. portal venous phase.
C. arterial phase
D. early arterial phase - C
for evaluation of the maximally enhanced hepatic parenchyma and demonstration of
hypovascular lesions such as hepatic metastases.
A. equilibrium phase.
B. portal venous phase.
, C. arterial phase
D. early arterial phase - B
for demonstration of hemangioma fill-in, & FNH central scar
A. delayed phase
B. portal venous phase.
C. arterial phase
D. early arterial phase - A
Which of the following phases of renal contrast enhancement provides maximum
sensitivity for parenchymal lesions?
A. Early arterial
B. Corticomedullary
C. Nephrographic
D. Excretory - C. During the nephrographic phase, enhancement between renal cortex
and medulla reaches equilibrium, providing optimal sensitivity for parenchymal lesions.
The nephrographic phase occurs between 70 and 90 seconds after the start of injection.
Which of the following phases of IV contrast agent administration provides the best
gastric and intestinal wall enhancement?
A. Early arterial
B. Corticomedullary
C. Portal venous
D. Excretory - C. For indications involving the GI tract, acquisition is typically obtained
during the portal venous phase for optimal gastric and intestinal wall enhancement.
To generate straight axial MPR's of a disk, the spine can be scanned helically and a
sagittal view is used to angle slices ___________ to the plane of a specific disc space.
A. Perpendicular
B. Parallel
C. Oblique - B
Clinical indications for spinal CT with IV contrast include all the following except:
A. Spondylolisthesis
B. Metastatic tissue
C. Osteomyelitis
D. H/o prior spinal surgery - A
The proper scan direction for CT exams of the face is:
A. Caudal-cranial
B. Cranial-caudal
C. Superior- Inferior
D. Left-right - A
