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Computed Tomography for Technologists 2nd Edition Exam Review Questions and Answers 100% Pass
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Computed Tomography for Technologists 2nd Edition Exam Review Questions and Answers 100% Pass Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination? A. Topogram B. Scout C. Scanogram D. Spiral - ANSWER-D. Spiral The ability of a system to differen...

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  • 10 november 2024
  • 62
  • 2024/2025
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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED




Computed Tomography for Technologists

2nd Edition Exam Review Questions and

Answers 100% Pass


Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination?


A. Topogram


B. Scout


C. Scanogram


D. Spiral - ANSWER✔✔-D. Spiral


The ability of a system to differentiate, on the image, objects with similar densities is known as:


A. High contrast resolution


B. Low contrast resolution


C. Spatial resolution


D. Temporal resolution - ANSWER✔✔-B. Low contrast resolution


Each two dimensional square of data that make up the CT image is called a:


A. Pixel


B. Voxel


C. Matrix

Copyright ©Stuvia International BV 2010-2024 Page 1/62

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED


D. Fragment - ANSWER✔✔-A. Pixel


How many pixels are contained in a 1,024 matrix image? A. 1,024


B. 2,048


C. 262,144


D. 1,048,576 - ANSWER✔✔-D. 1,048,576


Beam attenuation can be defined as:


A. The phenomenon by which artifacts result when lower energy photons are preferentially absorbed,

leaving only higher-intensity photons to strike the detector array.


B. Xray energy that is produced from bombarding a substance with fast moving electrons.


C. The ability of the detector to capture transmitted photons and change them to electronic signals.


D. The phenomenon by which an xray beam passing through a structure is decreased in intensity or

amount because of absorption and interaction with matter. - ANSWER✔✔-D. The phenomenon by which

an xray beam passing through a structure is decreased in intensity or amount because of absorption and

interaction with matter.


Which of the following is a low attenuation structure:


A. Iodine filled aorta


B. Rib


C. Trachea


D. Calcified arteries - ANSWER✔✔-C. Trachea



Copyright ©Stuvia International BV 2010-2024 Page 2/62

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED


An object is slightly less dense than water. What is the expected hounsfield measurement?


A. -940


B. -10


C. 50


D. 850 - ANSWER✔✔-B. -10


Why does the administration of iodinated contrast media result in an enhanced image?


A. Iodinated contrast material increases the ability of the enhanced structure to attenuate the xray

beam.


B. Iodinated contrast material decreases the average photon energy of the xray beam; therefore more

photons are absorbed by the patient.


C. The administration of contrast material results in a smaller pixel, thereby increasing spatial resolution,

which results in an enhanced image.


D. - ANSWER✔✔-A. Iodinated contrast material increases the ability of the enhanced structure to

attenuate the xray beam.


The xray beam sources for CT produce xray energy that is polychromatic. This means:


A. When viewed by the naked eye, the beam exhibits many different colors.


B. It produce, as a byproduct, a substance known as polychlorinated biphenyl.


C. Photons contained in the beam are all of the same wavelength.


D. The beam comprises photons with varying energies. - ANSWER✔✔-D. The beam comprises photons

with varying energies.

Copyright ©Stuvia International BV 2010-2024 Page 3/62

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED


An object that appears on the image but is not present in the object scanned is called a/n:


A. Artifact


B. Anomaly


C. Shadow


D. Ghost - ANSWER✔✔-A. Artifact


Which is an advantage of filtering the xray beam?


A. Filtering reduces the anode heat load


B. A filtered beam produces images with substantially less quantum mottle


C. Filtering the beam prevents energy from being converted to heat, therefore 100% of the energy is

converted to xrays.


D. Filtering reduces the radiation dose to the patient. - ANSWER✔✔-D. Filtering reduces the radiation

dose to the patient


Scan thickness is primarily important for the part it plays in:


A. Noise reduction


B. The contrast scale


C. Detector aperture opening


D. Volume averaging - ANSWER✔✔-D. Volume averaging




Copyright ©Stuvia International BV 2010-2024 Page 4/62

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