CT Registry Review Revised Questions and
Answers / Guaranteed Pass
A _______ is a benign, highly vascular mass commonly found in the liver. - hemangioma
A ________ infection is one that a patient acquires during a stay in a health care institution. -
Nosocomial
A 16-slice MSCT system utilizes an adaptive array of 24 detectors, each ranging in size from 0.625 to 1.25
mm. What is the maximum number of sections the system can acquire with each rotation of the gantry?
- 16
A common site for the IV administration of iodinated contrast media is the anterior recess of the elbow,
otherwise known as: - antecubital space.
A complete CT study of the orbits should include: - 2.5 mm x 2.5 mm axial and coronal sections
A CT angiogram (CTA) of the neck is performed primarily for the evaluation of the: - carotid
arteries.
A CT image is displayed in a window with a level of +200 and a width of 1000. What are the pixel values?
- Between -300 HU and +700 HU will be assigned shades of gray
A CT image is displayed in a window with a level of 0 and a width of 500. Which of the following
statements are correct? - Pixels with values between -250 HU and +250 HU will be assigned
shades of gray.
A CT image is formed in part by projecting back all of the attenuation values recorded during data
acquisition onto a: - matrix.
,A CT image is formed in part by projecting back all of the attenuation values recorded during data
acquisition onto a: - matrix.
A CT system measures the average linear attenuation coefficient of a voxel of tissue to be 0.008. The
linear attenuation coefficient of water for this scanner equals 0.181. The CT number assigned to the pixel
representing this voxel of tissue equals: - -956 HU
A first generation CT scanner consists of an x-ray tube and two detectors that translate across the
patient's head while rotating in 1 degree increments for a total of: - 180 degrees.
A focused, thin-section axial CT acquisition through just the region of the vocal cords should extend: -
From just above the hyoid bone inferiorly through the cricoid cartilage.
A normal range for diastolic blood pressure in an adult is? - 60-90 mm Hg
A patient in shock may exhibit which of the following symptoms? - Tachycardia, cyanosis, rapid,
and shallow breaths.
A patient's blood pressure is measured as 140/70 mm Hg. The number 140 represents? - The
pressure within the arterial vessel during contraction of the heart.
A primary responsibility of computed tomography in combined PET-CT is to: - Provide precise
anatomic location of tumor activity.
A region of interest (ROI) measurement placed over a portion of a CT image provides what type of
number? - Average CT Number (HU-Hounsfield Units)
A scintillation detector has a higher capture efficiency than? - A gas ionization chamber
A standard CT image reconstructed on a 512^2 matrix has a digital size of approximately... - 0.5
MB.
, A total volume of 125 mls of an iodinated contrast agent is administered intravenously via automatic
injector in 50 seconds. The flow rate for this injection is? - 2.5 mL/sec
A(n) _________ contrast material may be described as one that does not dissociate into charged
particles in solution. - non-ionic
Abnormalities of the middle and inner ear may be best demonstrated with CT utilizing _________
sections. - 1-2 mm
Accurate demonstration of ____________ would most likely require the intravenous injection of an
iodinated contrast agent during a CT study of the chest. - mediastinal lymphadenopathy
Advantages of a saline flush immediately following the IV administration of iodinated contrast media
include: - Reduction in required contrast agent dose, reduction in the incidence of contrast-
induced nephrotoxicity (CIN) and reduction of streaking artifacts from dense contrast agents in the
vasculature.
After initiation of rapid bolus administration of an iodinated contrast agent, he portal venous phase of
hepatic contrast enhancement occurs at approximately: - 60-70 seconds.
After initiation of rapid bolus administration of an iodinated contrast agent, the arterial phase of hepatic
contrast enhancement occurs at approximately? - 25-35 seconds
After initiation of rapid bolus administration of iodinated contrast material, the pancreatic phase of
contrast enhancement occurs at approximately: - 35-45 seconds.
Air trapping within the trachea and bronchial tree may be optimally demonstrated with multiplanar
volume reconstructions (MPVR) of the thorax known as: - minimum intensity projections (min-
IPs).
An acquisition is made on a 64-slice MSCT system in which each detector element has a z-axis dimension
of 0.625 mm. With a selected beam width of 40 mm and the beam pitch set at 1.50, how much will the
table move with each rotation of the gantry? - 60 mm
Answers / Guaranteed Pass
A _______ is a benign, highly vascular mass commonly found in the liver. - hemangioma
A ________ infection is one that a patient acquires during a stay in a health care institution. -
Nosocomial
A 16-slice MSCT system utilizes an adaptive array of 24 detectors, each ranging in size from 0.625 to 1.25
mm. What is the maximum number of sections the system can acquire with each rotation of the gantry?
- 16
A common site for the IV administration of iodinated contrast media is the anterior recess of the elbow,
otherwise known as: - antecubital space.
A complete CT study of the orbits should include: - 2.5 mm x 2.5 mm axial and coronal sections
A CT angiogram (CTA) of the neck is performed primarily for the evaluation of the: - carotid
arteries.
A CT image is displayed in a window with a level of +200 and a width of 1000. What are the pixel values?
- Between -300 HU and +700 HU will be assigned shades of gray
A CT image is displayed in a window with a level of 0 and a width of 500. Which of the following
statements are correct? - Pixels with values between -250 HU and +250 HU will be assigned
shades of gray.
A CT image is formed in part by projecting back all of the attenuation values recorded during data
acquisition onto a: - matrix.
,A CT image is formed in part by projecting back all of the attenuation values recorded during data
acquisition onto a: - matrix.
A CT system measures the average linear attenuation coefficient of a voxel of tissue to be 0.008. The
linear attenuation coefficient of water for this scanner equals 0.181. The CT number assigned to the pixel
representing this voxel of tissue equals: - -956 HU
A first generation CT scanner consists of an x-ray tube and two detectors that translate across the
patient's head while rotating in 1 degree increments for a total of: - 180 degrees.
A focused, thin-section axial CT acquisition through just the region of the vocal cords should extend: -
From just above the hyoid bone inferiorly through the cricoid cartilage.
A normal range for diastolic blood pressure in an adult is? - 60-90 mm Hg
A patient in shock may exhibit which of the following symptoms? - Tachycardia, cyanosis, rapid,
and shallow breaths.
A patient's blood pressure is measured as 140/70 mm Hg. The number 140 represents? - The
pressure within the arterial vessel during contraction of the heart.
A primary responsibility of computed tomography in combined PET-CT is to: - Provide precise
anatomic location of tumor activity.
A region of interest (ROI) measurement placed over a portion of a CT image provides what type of
number? - Average CT Number (HU-Hounsfield Units)
A scintillation detector has a higher capture efficiency than? - A gas ionization chamber
A standard CT image reconstructed on a 512^2 matrix has a digital size of approximately... - 0.5
MB.
, A total volume of 125 mls of an iodinated contrast agent is administered intravenously via automatic
injector in 50 seconds. The flow rate for this injection is? - 2.5 mL/sec
A(n) _________ contrast material may be described as one that does not dissociate into charged
particles in solution. - non-ionic
Abnormalities of the middle and inner ear may be best demonstrated with CT utilizing _________
sections. - 1-2 mm
Accurate demonstration of ____________ would most likely require the intravenous injection of an
iodinated contrast agent during a CT study of the chest. - mediastinal lymphadenopathy
Advantages of a saline flush immediately following the IV administration of iodinated contrast media
include: - Reduction in required contrast agent dose, reduction in the incidence of contrast-
induced nephrotoxicity (CIN) and reduction of streaking artifacts from dense contrast agents in the
vasculature.
After initiation of rapid bolus administration of an iodinated contrast agent, he portal venous phase of
hepatic contrast enhancement occurs at approximately: - 60-70 seconds.
After initiation of rapid bolus administration of an iodinated contrast agent, the arterial phase of hepatic
contrast enhancement occurs at approximately? - 25-35 seconds
After initiation of rapid bolus administration of iodinated contrast material, the pancreatic phase of
contrast enhancement occurs at approximately: - 35-45 seconds.
Air trapping within the trachea and bronchial tree may be optimally demonstrated with multiplanar
volume reconstructions (MPVR) of the thorax known as: - minimum intensity projections (min-
IPs).
An acquisition is made on a 64-slice MSCT system in which each detector element has a z-axis dimension
of 0.625 mm. With a selected beam width of 40 mm and the beam pitch set at 1.50, how much will the
table move with each rotation of the gantry? - 60 mm
