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Chapter 9

SWGTC-R/T-Chapter 9-Wallace-Grids & the Bucky

using a grid <increases/decreases> radiographic contrast increases
what do grids do to scatter? grids absorb scatter and prevent scatter from reaching the film
each strip on a grid is separated by a space called a/an __________. interspace
the interspace can be made of : cardboard fiber, aluminum or plastic
the interspace material is __________, which means that it does not absorb the x-ray beam. radiolucent
most common grid focused grid
strips in center are parallel to each other, angled at the sides on this grid focused grid
all strips are parallel on this grid parallel grid
this grid pattern absorbs the most scattered radiation crossed/cross-hatch grid
grid ratio relationship between the height of the lead strips and the distance between them
What will absorb more radiation, a high ratio grid (16:1) or a low (6:1)? High (16:1)
Grid frequency number of grid lines per inch
unwanted absorption of primary radiation by the grid grid cut-off
What will cause grid cut-off when using a focused grid? wrong SID. grid is angled against the grid lines, grid is angled in relation to the x-ray beam, grid is upside down
focal range acceptable range of SID's that can be used with a focused grid
Created by: kristinalyn