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- X-rays that create the true image on the film travel in a straight line, so they will pass right through the grid.
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A grid is used to absorb scattered radiation and prevent it from reaching the image receptor. A grid consists of lead strips standing on edge separated by interspaces. The focused grid is the most common pattern. Grid cut-off is the unwanted absorption of primary radiation by the grid.
So, primary photons will pass through grid plates while scatter x-rays will more likely be stopped by the plates of the grid. The grid ratio is the ratio of the height of the grid plate, often called grid septa, to the grid width.
Apr 24, 2017 · An X-ray grid is a filtering device that ensures the clarity of the image on X-ray film. When an X-ray machine sends radiation through an object, specifically a body, the object absorbs or deflects most of the rays.
- James Mcgill
Feb 6, 2015 · The only x-rays transmitted through a grid are those that travel straight in the direction of the interspace. X-rays that travel in an angle are absorbed by the radio-opaque material in the grid. Taken from Radiologic Science for technologists (10th ed.) (p. 195), by S.C. Bushong, 2013, St. Louis, MO: Mosby Elsevier.
The antiscatter grid plays an important role for enhancing image quality in projection radiography by transmitting a majority of primary radiation and selectively rejecting scattered radiation.
Apr 15, 2019 · In a grid, each line pair of interspacers and absorbers is aligned at a certain angle in the direction of the X-ray source, maintaining the linearity of the X-ray. This angle is determined by focal distance (FD), which is the distance between X-ray tube focus and bottom surface of the grid.
Antiscatter grids improve the X-ray image contrast at a cost of patient radiation doses. The choice of appropriate grid or its removal requires a good knowledge of grid characteristics, especially for pediatric digital imaging. The aim of this work ...
