Influence of grid focal length difference

The difference in the focal length of the grid affects the image capture effect. Generally, the grid is installed on the film frame and the film bed to filter stray rays, make the image clearer, and reduce the radiation to the human body. It is usually used to take chest X-rays when it is installed on a film stand. At this time, a grid with a focal length of 1.8 meters should be selected. When it is installed on a filming bed, a grid with a focal length of 1 meter should be selected. When a grid is required for both standing and lying positions, the grid with a focal length of 1.3 meters should be selected. If the focal length of the grid is selected incorrectly, the captured image will be uneven, which will affect the doctor’s diagnosis.
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Author：X Ray Grids Maker