Lab 6 Flashcards
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Inherent subject contrast in CT is displayed due to differences in attenuation within the volume of interest, represented as Hounsfield units. True or False?
True
If contrast is injected into the right antecubital vein, imaging of which of the following would require the shortest scan delay?
a. Right ventricle
b. Right pulmonary artery
c. IVC
d. Right superior pulmonary vein
A=right ventricle
The cortico-medullary phase of contrast enhancement (differentiation between the cortex and the medulla) of the kidney is most closely associated with which of the following phase(s) of contrast enhancement?
a. Non-contrast
b. Arterial
c. Venous
d. Both b & c
b. Arterial
In which of the following structures in the liver is contrast enhancement seen during the bolus phase?
a. Portal vein
b. Hepatic arteries
c. Hepatic veins
d. IVC
Hepatic arteries
The nephrographic phase of the kidney typically coincides with the portal venous phase of the abdomen. True or False?
True
What phase of contrast enhancement is seen in the abdomen CT image?
a Arterial
b. Venous
c. Early Arterial
d. Only inherent contrast is seen in the image
Only inherent contrast is seen in the image
What phase of contrast enhancement is seen in the abdomen CT image?
a Non-contrast
b. Bolus
c. Non-equilibrium
d. Equilibrium
Bolus
What phase of contrast enhancement is seen in the abdomen CT image?
a. Non-contrast
b. Arterial
c. Venous
d. Delayed
c. Venous
Intravenous CT contrast media is made up of water soluble:
a. Creatinine
b. Metformin
c. Saline
d. Iodine
d. Iodine
Which of the following route(s) of contrast administration would be suitable to highlight the GI tract?
a. Intravenous
b. Oral
c. Intrathecal
d. Urethral
e. Both b & c
Oral
Which of the following are considered renal risk factors for intravenous CT contrast media administration?
a Diabetes
b. High creatinine levels
c. Age ≥ 70
d. Solitary kidney
e. All the above
f. b & d only
All of the above
Which of the following best describes the term “scan delay”?
a. Time between successive low dose scans during a test bolus injection
b. Time between the start of the intravenous contrast injection and the start of image acquisition
c. Time between the start of the intravenous contrast injection and the arrival of contrast in the heart
d. Delay in completing scan due to an interstitial injection of IV contrast media.
b. Time between the start of the intravenous contrast injection and the start of image acquisition
What is the typical scan delay for a CT of the chest with intravenous contrast in order to visualize both arterial and venous enhancement?
a. 20 secs
b. 30 secs
c. 60 secs
d. Scan delay for a CT chest with contrast is typically determined using a test bolus or bolus triggering method.
30 seconds
Which of the following is considered a mild adverse reaction caused by the administration of IV contrast media in CT?
a. Rapid pulse
b. Urticaria
c. Changes to blood pressure
d. Respiratory distress
b. Urticaria