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CT Protocols Final Exam Questions
and Answers 100% Pass
localizer scan - ✔✔his scan allows the technologist to prescribe the location of cross sectional slices. The
extent of the anatomic area included on localizer images is controlled by the technologist and dependent
on the type of study.
collimation - ✔✔In MDCT this parameter is controlled by detector configuration and affects -Total scan
time -Thinnest available recons -Noise / Low contrast resolution -Affect quality of coronals and other
reformats
kVp - ✔✔this parameter determines tube potential
gantry rotation speed - ✔✔the technical parameter controlling a CT system of temporal resolution. It is
how fast the gantry rotates and how fast the images are taken.
pitch - ✔✔described as the movement of the table throughout a helical scan divided by slice thickness
reconstructed slice thickness - ✔✔performed after the initial prospective reconstruction to slice thickness
slice interval - ✔✔the distance between the center of one CT section and the center of the next adjacent
section
bolus phase - ✔✔In this phase, the arterial structures are filled with contrast and brightly displayed on
the image. Contrast has not yet filled the venous structures. Also called the arterial phase.
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,2|Page
non-equilibrium phase - ✔✔In this phase the contrast is still brighter in the arteries than in the
parenchyma of organs, but now the venous structures are also opacified, This phase begins 1 minute after
the start of the injection and lasts only a short time. Also called the venous phase.
equilibrium phase - ✔✔In this phase the contrast is largely emptied from the arteries, is greatly diluted in
the veins and has soaked the organ parenchyma. Also called the delayed phase.
CVAD - ✔✔venous catheter designed to deliver medications and fluids directly into the superior vena
cava, inferior vena cava, or right atrium
PICC - ✔✔long catheter that is inserted through the large veins of the upper arm and advanced so that its
tip is located in the lower one third of the SVC
Tunneled catheters - ✔✔inserted into the targeted vein (often the subclavian) underneath the skin, i.e.,
Hickman, Broviac, and Groshong
Non-tunneled catheters - ✔✔larger caliber devic than PICC, inserted into a relatively large, more central
vein such as the jugular, subclavian or (less commonly) the femoral vein
Tumors and other disease processes always have different attenuation coefficients than those of their
surrounding tissue. - ✔✔False
For a patient's consent to be valid, she must be considered competent to make the decision at hand and
her consent must be voluntary. - ✔✔True
In communication, you should assume that a nonresponsive patient cannot hear you. - ✔✔False
Communication is the transmission of meaning. - ✔✔True
What qualities must the CT technologist look for in an established IV site when administering IV
contrast?
Emily Charlene © 2025, All Rights Reserved.
, 3|Page
Please choose all that apply. - ✔✔-ensure that the line is patent
-evaluate the site for appropriateness for contrast media injection
-turn off existing medication, if OK's by nurse or physician
-ensure that IV gauge is appropriate for contrast media protocol
Conventional radiography barium suspension cannot be used in CT. - ✔✔True
A number of independent studies have established a link between effective communication and a
reduction in malpractice claims. - ✔✔True
Because the data selected for SFOV are a subset of all the scan data available, the SFOV cannot be larger
than the DFOV. - ✔✔False
The half life of IV contrast for patients with normal renal function is 4 hours. - ✔✔False
In general the shortest gantry revolution time ( such as 0.4-0.5) must be used for most CT studies. An
exception to this rule is CT evaluation of a large patient, where use of longer gantry rotation time helps
increase total tube current. - ✔✔True
Which is NOT a goal of the questions included on the CT history? - ✔✔-choosing the most intelligent
technologist
-choosing the proper radiologist
What barrier to communication is likely to occur when the receiver doesn't like portions of the sender's
message? - ✔✔receiver distortion
Which is true about meanings with respect to communication? - ✔✔meanings are not entirely contained
in the message. They are interpreted by the message receiver.
Emily Charlene © 2025, All Rights Reserved.
CT Protocols Final Exam Questions
and Answers 100% Pass
localizer scan - ✔✔his scan allows the technologist to prescribe the location of cross sectional slices. The
extent of the anatomic area included on localizer images is controlled by the technologist and dependent
on the type of study.
collimation - ✔✔In MDCT this parameter is controlled by detector configuration and affects -Total scan
time -Thinnest available recons -Noise / Low contrast resolution -Affect quality of coronals and other
reformats
kVp - ✔✔this parameter determines tube potential
gantry rotation speed - ✔✔the technical parameter controlling a CT system of temporal resolution. It is
how fast the gantry rotates and how fast the images are taken.
pitch - ✔✔described as the movement of the table throughout a helical scan divided by slice thickness
reconstructed slice thickness - ✔✔performed after the initial prospective reconstruction to slice thickness
slice interval - ✔✔the distance between the center of one CT section and the center of the next adjacent
section
bolus phase - ✔✔In this phase, the arterial structures are filled with contrast and brightly displayed on
the image. Contrast has not yet filled the venous structures. Also called the arterial phase.
Emily Charlene © 2025, All Rights Reserved.
,2|Page
non-equilibrium phase - ✔✔In this phase the contrast is still brighter in the arteries than in the
parenchyma of organs, but now the venous structures are also opacified, This phase begins 1 minute after
the start of the injection and lasts only a short time. Also called the venous phase.
equilibrium phase - ✔✔In this phase the contrast is largely emptied from the arteries, is greatly diluted in
the veins and has soaked the organ parenchyma. Also called the delayed phase.
CVAD - ✔✔venous catheter designed to deliver medications and fluids directly into the superior vena
cava, inferior vena cava, or right atrium
PICC - ✔✔long catheter that is inserted through the large veins of the upper arm and advanced so that its
tip is located in the lower one third of the SVC
Tunneled catheters - ✔✔inserted into the targeted vein (often the subclavian) underneath the skin, i.e.,
Hickman, Broviac, and Groshong
Non-tunneled catheters - ✔✔larger caliber devic than PICC, inserted into a relatively large, more central
vein such as the jugular, subclavian or (less commonly) the femoral vein
Tumors and other disease processes always have different attenuation coefficients than those of their
surrounding tissue. - ✔✔False
For a patient's consent to be valid, she must be considered competent to make the decision at hand and
her consent must be voluntary. - ✔✔True
In communication, you should assume that a nonresponsive patient cannot hear you. - ✔✔False
Communication is the transmission of meaning. - ✔✔True
What qualities must the CT technologist look for in an established IV site when administering IV
contrast?
Emily Charlene © 2025, All Rights Reserved.
, 3|Page
Please choose all that apply. - ✔✔-ensure that the line is patent
-evaluate the site for appropriateness for contrast media injection
-turn off existing medication, if OK's by nurse or physician
-ensure that IV gauge is appropriate for contrast media protocol
Conventional radiography barium suspension cannot be used in CT. - ✔✔True
A number of independent studies have established a link between effective communication and a
reduction in malpractice claims. - ✔✔True
Because the data selected for SFOV are a subset of all the scan data available, the SFOV cannot be larger
than the DFOV. - ✔✔False
The half life of IV contrast for patients with normal renal function is 4 hours. - ✔✔False
In general the shortest gantry revolution time ( such as 0.4-0.5) must be used for most CT studies. An
exception to this rule is CT evaluation of a large patient, where use of longer gantry rotation time helps
increase total tube current. - ✔✔True
Which is NOT a goal of the questions included on the CT history? - ✔✔-choosing the most intelligent
technologist
-choosing the proper radiologist
What barrier to communication is likely to occur when the receiver doesn't like portions of the sender's
message? - ✔✔receiver distortion
Which is true about meanings with respect to communication? - ✔✔meanings are not entirely contained
in the message. They are interpreted by the message receiver.
Emily Charlene © 2025, All Rights Reserved.
