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Chapter 10

SWGTC-R/T-Chapter 10-Wallace-Methods to Control Scatter

QuestionAnswer
more matter= more _________ scatter
true/false> the x-ray beam should never be larger than the size of the film true
a change in collimation size affect both ________and ________. density and contrast
true/false> a filter absorbs low energy photons from the x-ray beam and reduces patient radiation dose. true
filtration has an affect on both _______ and ______as it has an effect on the quantity and quality of the x-ray beam. contrast and density
filtration <decreases/increases> density and contrast decreases
What are the two types of filtration? inherent and added
this type of filtration is part of the tube and can not be eliminated. hat is it and how does it work. inherent. the window of the tube acts to filter some of the photons from the beam.
this type of filter is placed under the window between the tube and the collimator. what is it and hat is it usually made of? added filtration, made of metal, usually aluminum
true/false>by law, added filtration is now included in every x-ray tube and is not removable. true
2 shapes of compensatory filters placed in a track under the collimator wedge and trough
The wedge filter has a thick end and a thin end. The smaller part of the patient should be placed under the ________end. thick
What is the purpose of the wedge filter? used to give uniform density when the body part being examined is thicker on one end than the other.
this type of compensatory filter is thicker on its edges and thin in the middle. trough
What are the best method to control scatter? grids and collimator
What is contained in the back of a cassette? lead
Created by: kristinalyn on 2006-11-04



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