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The main function of the grid is to eliminate the influence of scattered rays on the film. Should be placed between the human body and the film, most of the scattered rays can be filtered out, and only a small part of the scattered rays can be leaked. Wire grid can improve the quality of X-ray machine medical equipment filming. When the thickness and density of the object being photographed are relatively large, the grid can improve the quality of the picture. It is recommended to use the grid when shooting with high-frequency machines. The effect is will be better.
The appearance of the grid is a flat plate with a thickness of 4-8mm. The internal structure is formed by intersecting many thin lead strips. The two lead strips are filled and positioned with a material that is easy to penetrate X-ray, and glued together. The filler can be wood, paper or aluminum sheet. Finally, the top and bottom are encapsulated with thin aluminum plates to form a grid plate. Seen from the cross section, the arrangement direction of the lead strips of the filter plate will gather to one point. Seen from the entire grid, there is a line of convergence.
The reason why the grid can improve the image quality of X-ray photography is because the application of high-purity lead in the grid provides high efficiency in anti-scattering.
Secondly, the accurate combination of aluminum base and aluminum strip makes the image clearer. The lead grid is wrapped with a smooth aluminum cover, and enamel is added to protect the grid from heat and dust, reducing the number of maintenance.
According to the structure, the grid can be divided into:
1 Convergence grid 2 Parallel grid 3 Cross grid 4 Arc grid
According to the material, it can be divided into:
1 Commonly used grid: The internal spacer is composed of non-metallic materials, such as wood chips, paper chips, plastics and other non-metallic low-density materials;
2 All metal grid: the internal spacer is made of metal material: aluminum sheet, which has high strength and good moisture resistance;


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