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CT image production final questions with complete solutions
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CT image production final questions with complete solutions
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CT image production finalThe 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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