Faqs for grids
Some of the frequently asked questions on anti-scatter grids are listed below. For any other questions and queries, please contact us.
What is an anti-scatter grid?
An anti-scatter grid acts as a filter to improve the contrast of the radiation image by absorbing the scattered radiation, while increasing the transmission of primary radiation.
What is the role of an anti-scatter grid ?
It improves the sharpness of X-Ray images, thus making them more defined and clear.
What is an anti-scatter grid composed of ?
Anti-scatter grid generally incorporates lead strips to improve contrast and aluminium alloy with fine thickness for controlling the absorption information bearing primary X-Rays.
What are the important parameters of a good anti-scatter grid ?
Line density
It is the number of X-Ray absorbing strips per centimeter. It is generally measured in lines per inch or lines per centimeter.
Grid ratio
It is the thickness of the grid. The thicker the grid, the sharper is the image but lower is the X-Ray transmission. In case of high X-Ray output, thicker grid is used and vice versa.
Focussing distance
It is the distance between the X-Ray tube and the grid. In case the focal distance is not proper, then a part of primary radiation required to create an image is also absorbed along with scattered radiation, resulting in a poor quality image.
What are different types of anti-scatter grids ?
Focused grids, parallel grids, cross grids etc.
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