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Chapter 12: Scatter Control

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Term
Definition
air gap technique   show
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show Simplest type of beam-restricting device, constructed of a flat piece of lead that has a hole in it  
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show Automatically limits the size and shape of a primary beam to the size and shape of the IR. Also called a positive beam-limiting device  
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beam-restricting device   show
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beam restriction   show
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Bucky   show
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show Can be used to determine the adjustment in milliampere/second needed when changing from using a grid to non-grid (or vice versa) or for changing to grids with different grid ratios; also called the grid-conversion factor (GCF)  
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collimation   show
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collimator   show
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cone   show
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convergent line   show
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show An imaginary point, if imaginary lines were drawn from each of the lead lines in a linear focused grid  
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show Has lead lines that run at a right angle to one another  
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show Has lead lines that run at a right angle to one another  
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show Essentially an aperture diaphragm that has an extended flange attached to it  
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focal distance   show
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show The recommended range of SID measurements that can be used with a focused grid  
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focused grid   show
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grid   show
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grid cap   show
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show An IR that has a grid permanently mounted to its front surface  
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show Can be used to determine the adjustment in milliampere/second needed when changing from using a grid to a non-grid (or vice versa) or for changing to grids with different grid ratios; also called the Bucky factor  
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grid cutoff   show
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grid focus   show
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grid frequency   show
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grid pattern   show
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show The ratio of the height of the lead strips to the distance between them  
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show Radiolucent strips between the lead lines of a grid, generally made of aluminum  
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show Changes the shape and size of the projected x-ray field; similar to an aperture diaphragm  
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linear grid   show
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show A zebra pattern artifact that can occur during CR imaging if the grid frequency is similar to the laser scanning frequency or if a grid cassette is placed in a Bucky  
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show Has lead lines that run parallel to one another; also called a parallel grid  
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show Has lead lines that run parallel to one another; also called a nonfocused grid  
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show Automatically limits the size and shape of the primary beam to the size and shape of the IR; also called an automatic collimator  
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wafer grid   show
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