Computer Tomography Module #2 Study
Guide Questions With Accurate Answers
A 10x10 matrix consists of ....... pixels. correct answer 100
A digital image is a discrete function. correct answer true
A digital image: correct answer is a numerical representation of an object
A radiograph is an example of an analog image. correct answer true
A single ray in computed tomography (CT) is: correct answer a single straight line
path of an x-ray beam.
A view in CT is correct answer a collection of rays for one translation across the
object.
A view in CT is: correct answer a collection of rays for one translation across the
object.
Aliasing results in an artifact that appears as moire pattern in the image. correct
answer true
All of the following apply to computed tomography (CT) except: correct answer x-
ray film is used as the detector.
, An increase of matrix size (with no change in field of view (FOV) will.....detail.
correct answer increase
Compared with conventional CT scanners, slip-ring scanners offer all of the
following advantages except: correct answer capacity for interrupted acquisition
protocols.
CT is better at recording very small differences in tissue contrast compared to
conventional tomography. correct answer true
CT overcomes the limitations of radiography and conventional tomography by
achieving all of the following except: correct answer reducing a patient's radiation
dose.
If the linear attenuation coefficients for bone and water are 0.380 and 0.190,
respectively, and the scaling factor of the scanner is 1000, the CT number for
bone is: correct answer +1000
In which of the following are slices taken at specific locations on the patient?
correct answer conventional slice-by-slice CT
In which of the following is the brightness level of each pixel in the picture
measured by a photomultiplier tune (PM)? correct answer Sampling
Scintillation detectors convert x-ray photons to light and subsequently to
electrical signals. correct answer true
Guide Questions With Accurate Answers
A 10x10 matrix consists of ....... pixels. correct answer 100
A digital image is a discrete function. correct answer true
A digital image: correct answer is a numerical representation of an object
A radiograph is an example of an analog image. correct answer true
A single ray in computed tomography (CT) is: correct answer a single straight line
path of an x-ray beam.
A view in CT is correct answer a collection of rays for one translation across the
object.
A view in CT is: correct answer a collection of rays for one translation across the
object.
Aliasing results in an artifact that appears as moire pattern in the image. correct
answer true
All of the following apply to computed tomography (CT) except: correct answer x-
ray film is used as the detector.
, An increase of matrix size (with no change in field of view (FOV) will.....detail.
correct answer increase
Compared with conventional CT scanners, slip-ring scanners offer all of the
following advantages except: correct answer capacity for interrupted acquisition
protocols.
CT is better at recording very small differences in tissue contrast compared to
conventional tomography. correct answer true
CT overcomes the limitations of radiography and conventional tomography by
achieving all of the following except: correct answer reducing a patient's radiation
dose.
If the linear attenuation coefficients for bone and water are 0.380 and 0.190,
respectively, and the scaling factor of the scanner is 1000, the CT number for
bone is: correct answer +1000
In which of the following are slices taken at specific locations on the patient?
correct answer conventional slice-by-slice CT
In which of the following is the brightness level of each pixel in the picture
measured by a photomultiplier tune (PM)? correct answer Sampling
Scintillation detectors convert x-ray photons to light and subsequently to
electrical signals. correct answer true
