How does the focal range of an X-ray grid impact its performance and image quality?

The focal range of an X-ray grid refers to the distance between the focal spot of the X-ray tube and the grid itself. The focal range has a significant impact on the performance and image quality of the X-ray system.
A grid with a smaller focal range provides better image quality because it allows for efficient scatter radiation removal. When the focal range is too large, scatter radiation is not effectively absorbed, leading to degraded image quality and decreased contrast.
Moreover, a smaller focal range improves the alignment of the X-ray photons with the grid’s lead strips, increasing the transmission of primary X-ray photons and reducing grid cutoff. Grid cutoff occurs when the grid absorbs primary X-ray photons, resulting in underexposed areas on the image.
In summary, a smaller focal range improves scatter radiation removal, enhances primary X-ray photon transmission, and ultimately enhances image quality in X-ray imaging.
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Author：X Ray Grids Maker