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WEEK 9 RAD 107

MID TERM

QuestionAnswer
Lossy compression reduces data files greater than 10:1
The ability to image small objects that have high subject contrast is known as Spatial resolution
The ability to distinguish anatomical structures of similar subject contrast is known as Contrast resolution
Unequal magnification of different portions of the same object is known as Distortion
The random fluctuation of x-ray interaction on the image receptor is known as Radiographic noise
Of all imaging modalities, _______________ has the best contrast resolution. MRI
The contrast improvement factor equals Image contrast with a grid / image contrast without a grid
The height of the grid divided by the interspace width is known as the Grid ratio
As the x-ray beam field size increases, what happens to scatter radiation? Increases
Which factor(s) contribute to increased scatter radiation? Increased patient thickness
The Bucky factor is defined as Incident remnant x-rays / transmitted image-forming x-rays
Which type of compression is greater than 10:1 and supports teleradiology but not CAD? Lossy compression
A graph of frequency of occurrence versus digital value intervals is known as A histogram
Which of the following is a unique artifact for digital radiographic image receptors? Pixel failure
zWhat is the process of assigning a value to a dead pixel based on the recorded values of adjacent pixels? Interpolation
Created by: edwingp
 

 



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