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CT chap 1,3,4,5 questions with correct answers graded A+
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CT chap 1,3,4,5 questions with correct answers graded A+
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CT chap 1,3,4,5Sectional images are obtained from all of the following except:
tomography
transverse axial tomography
conventional radiography
computed tomography - correct answer ✔✔conventional radiography
data acquisition refers to:
collecting x-ray transmission readings from the patient
subjecting data to computer processing
changing the data before they are displayed on a monitor
storing the data collected from the patient onto magnetic tapes or disks - correct answer ✔✔collecting
x-ray transmission readings from the patient
which of the following refers to modifying computed tomographic data to make the images more useful
to the observer?
image manipulation
image reconstruction
data collection
pattern recognition - correct answer ✔✔image manipulation
When a large set of transmission measurements is collected from the patient at different locations and is
used to build up an image of internal anatomy, it is referred to as:
tomography
,image reconstruction from projections
pattern recognition
digital image processing - correct answer ✔✔image reconstruction from projections
all of the following apply to CT except:
a computer is used to reconstruct cross-sectional images of the patient
mathematical methods are used to reconstruct images
x-ray film is used as the detector
special detectors are used to detect x-rays that have passed through the patient at multiple angles. -
correct answer ✔✔x-ray film is used as the detector
through the patient is:
attenuation
the relative transmission value
the natural logarithm
the linear attenuation coefficient - correct answer ✔✔attenuation
which of the following refers to the size, shape, motion, and path traced by the x-ray beam as it scans the
patient?
beam geometry
projection profile
data acquisition
detector tracing - correct answer ✔✔beam geometry
a single ray in computed tomography is:
, a beam of x-rays emanating from the x-ray tube
a single straight line path of an x-ray beam
the total attenuation as measured by the detector
a collection of beams gathered by the detector - correct answer ✔✔a single straight line path of an x-ray
beam
computed tomography detectors generate a signal that represents the attenuation as the ray moves
across the slice. This signal is called:
a view sample
an acquisition sample
a profile
a data sample - correct answer ✔✔a profile
Which computed tomography scanner is based on a fan beam geometry and complete rotation of the x-
ray tube and detectors?
first-generation scanner
second-generation scanner
third-generation scanner
fourth-generation scanner - correct answer ✔✔third-generation scanner
fourth-generation computed tomography scanners are characterized by:
rotate-translate motion and parallel beam geometry
rotate-translate motion and fan beam geometry
fan beam geometry and continuous rotation of x-ray tube and detectors
fan beam geometry and complete rotation of x-ray tube around a stationary ring of detectors - correct
answer ✔✔fan beam geometry and complete rotation of x-ray tube around a stationary ring of detectors
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