Computed Tomography || CORRECTLY SOLVED!!
Each sweep of the source-detector around the body during CT is called a _____. correct
answers translation
Each CT projection records variations in ____. correct answers mass density and effective
atomic number
Each CT projection is ____.
1. printed on film
2. stored on the computer
3. displayed on the monitor correct answers stored on the computer
The cross-sectional anatomy is translated into ____ during CT reconstruction. correct
answers a matrix of values
The first generation of computed tomography used ______ detector (s). correct answers one
The principal drawback of the first-generation CT scanner was the ____. correct answers long
scanning time
The second-generation CT scanners had the disadvantage of increased _____. correct answers
beam scatter
The reduction in ______ was the principal advantage of the second-generation CT scanners.
correct answers scanning time
The third generation of CT scanners allowed for further reduction in ____.
1. scanning time
2. fan-beam width
3. scattered radiation correct answers scanning time & scattered radiation
The _____ generation of CT scanners was the first to have the fan beam transect the entire
patient at all times. correct answers third
What is the principal disadvantage of third generation CT scanners? correct answers ring
artifacts
The new development in the fourth generation CT scanner is the _____. correct answers
stationary detector array
Many CT x-ray tubes have the capacity for millions of _____ with each exam. correct
answers heat units
The concentration of scintillation detectors affects the _____ of the CT image. correct
answers spatial resolution
The patient dose in CT is determined by the ____ collimator.
1. pre-patient
2. post-patient
Each sweep of the source-detector around the body during CT is called a _____. correct
answers translation
Each CT projection records variations in ____. correct answers mass density and effective
atomic number
Each CT projection is ____.
1. printed on film
2. stored on the computer
3. displayed on the monitor correct answers stored on the computer
The cross-sectional anatomy is translated into ____ during CT reconstruction. correct
answers a matrix of values
The first generation of computed tomography used ______ detector (s). correct answers one
The principal drawback of the first-generation CT scanner was the ____. correct answers long
scanning time
The second-generation CT scanners had the disadvantage of increased _____. correct answers
beam scatter
The reduction in ______ was the principal advantage of the second-generation CT scanners.
correct answers scanning time
The third generation of CT scanners allowed for further reduction in ____.
1. scanning time
2. fan-beam width
3. scattered radiation correct answers scanning time & scattered radiation
The _____ generation of CT scanners was the first to have the fan beam transect the entire
patient at all times. correct answers third
What is the principal disadvantage of third generation CT scanners? correct answers ring
artifacts
The new development in the fourth generation CT scanner is the _____. correct answers
stationary detector array
Many CT x-ray tubes have the capacity for millions of _____ with each exam. correct
answers heat units
The concentration of scintillation detectors affects the _____ of the CT image. correct
answers spatial resolution
The patient dose in CT is determined by the ____ collimator.
1. pre-patient
2. post-patient
