Grid radiology notes

Grid radiology is one of the important components of the X-ray machine. When photographing with the focus movable x-ray grid, the focal length must be equal to the grid focal length.
If there is a difference between the focal length of the film and the focal length of the grating, the film center receives a large amount of X-ray and the two sides gradually reduce, and the degree of reduction increases with the increase of the difference and the increase of the breathing area.

The reason is that X ray is formed into an Angle with the lead that forms grid radiology, that is, the larger the Angle is, the more X ray is absorbed, and this absorption is more significant with the increase of gate ratio.
Newheek filter grid is divided into linear grid and grid grid.According to geometric classification, the filter grid is divided into parallel grid and focusing grid.If classified by structure, the filter grid is divided into static grid and active filter.
Clinical use is static or active linear focus grid radiology.
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Author：Glinda