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rad 107

week 12

QuestionAnswer
1.The __________ generation of CT scanners was the first to have the fan beam transect the entire patient at all times. third
2.Each pixel of information in the CT image contains numerical information in ___________ units. Hounsfield
3.The cross-sectional anatomy is translated into ___________ during CT reconstruction. a matrix of values
4.The time from the end of CT imaging to image appearance is called the ______ time. reconstruction
5.Each sweep of the source-detector around the body during CT is called a __________. translation
6.Each CT projection is ______________________. stored on the computer
7.The new development in the fourth-generation CT scanner is the ________________. stationary detector assembly
8.The concentration of scintillation detectors affects the ___________ of the CT image. spatial resolution
9.The patient dose in CT is determined by the ________________ collimator. prepatient
10.The pixel size is reduced when the _______ size is increased and the _____________ size is fixed. matrix; field of view
11.The time from the end of imaging to appearance of the image is known as ______________. reconstruction time
12.The degree of spatial resolution in any CT imaging system is limited to the size of the ___________. pixel
13.Reconstruction of any image at any z-axis projection is possible because of a mathematical process known as ______________. interpolation
14.The CT scanner must be calibrated so that ____________ is at CT number zero. water
15.Blurred-ripple artifacts appear ______________. perpendicular to the x-ray tube sweep direction
Created by: epester
 

 



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