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Exam (elaborations)

CT image production final questions with complete solutions

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  • Ct image production
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  • Ct Image Production

CT image production final questions with complete solutions

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  • August 10, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Ct image production
  • Ct image production
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Sakayobako30
CT image production final

The principal advantage of CT over projection radiography is:



a. speed of image acquisition

b. contrast resolution

c. spatial resolution - correct answer ✔✔b. contrast resolution



Computed Tomography results in a:



a. analog image

b. linear image

c. digital image

d. curvilinear image

e. image in time - correct answer ✔✔c. digital image



Analog images are ___________ images.



a. continuous

b. discrete - correct answer ✔✔a. continuous



Attenuation is the _________ of the intensity of a beam of radiation as it passes through an object.



a. reduction

b. addition - correct answer ✔✔a. reduction



Which of the following is a characteristic of first generation CT imager?

,a. detector array

b. fan beam

c. pencil beam

d. slip ring technology - correct answer ✔✔c. pencil beam



Each pixel in the reconstructed image is assigned a CT ___________.



a. number

b. letter - correct answer ✔✔a. number



Which of the following is a characteristic of first generation CT imager?



a. detector array

b. fan beam

c. translate-rotate

d. slip ring technology - correct answer ✔✔c. translate-rotate



Image digitization happens in which order?



a. sampling, quantization, scanning

b. quantization, sampling, scanning

c. scanning, sampling, quantization - correct answer ✔✔c. scanning, sampling, quantization



True or False: the image algorithm used by current CT systems is filtered back projection or iterative. -
correct answer ✔✔true



Modern day CT scanners (ex- 64 slice) closest resemble which generation?

, a. third

b. fourth

c. second - correct answer ✔✔a. third



Pixel size is computed by:



a. FOV divided by matrix size

b. FOV squared multiplied by matrix size

c. FOV squared divided by matrix size

d. FOV multiplied by matrix size - correct answer ✔✔a. FOV divided by matrix size



Fourth generation scanners had ________ worth of detectors?



a. 90 degrees

b. 180 degrees

c. 360 degrees - correct answer ✔✔c. 360 degrees



Filtration removes __________ wavelengths that do not play a role in CT image formation.



a. short

b. long - correct answer ✔✔b. long



_____________ assigns an integer resulting in a digital image.



a. sampling

b. quantization - correct answer ✔✔b. quantization



When comparing a 512x512 matrix to a 1024x1024 matrix, the 1024x1024 matrix:

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