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Where should the grid be placed when filming

The function of the wire grid is to filter out the effect 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 are leaked.
The appearance of the wire grid is a flat plate with a thickness of 4~8mm. The internal structure is made up of many thin lead strips intersecting and arranging. The two lead strips are filled and positioned with an X-ray-transparent material and glued together. The filler can be wood, paper or aluminum sheets, etc. Finally, the top and bottom are encapsulated with thin aluminum plates to form a grid plate. From the cross-section, the arrangement direction of the lead strips of the filter plate will converge to one point. From the whole grid, there is a convergence line
It is generally considered that the exposure coefficient of the grid is one of the standards for measuring a grid. The exposure coefficient B is the ratio of the exposure amount required to obtain the same density value when the grid is not used and when the grid is used. The B value Generally between 2 and 6, the smaller the B value of the grid with the same performance, the better, and when performing X-ray photography, the thickness of the limb is generally more than 15cm, the grid will be used.

X-ray grid

Author:X Ray Grids Maker

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