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The parameters required for purchasing x ray grids.

The application of breast X ray grid

The appearance of the X-ray grid is a 4-8mm thick plate. The internal structure is composed of many thin lead bars arranged intersectionally. The two lead strips were filled and positioned with X-ray material and bonded together. Fillers can be wood, paper or aluminum sheets. Finally, the upper and lower parts are packaged with thin aluminium sheets to form a filter grating. From the cross-section, the direction of the filter plate lead will converge to a point. From the whole grid, there is a convergence line.

Focus: The vertical distance from the lead convergence line to the grid surface, f.

Gate Ratio: It’s also grid ratio. It’s the ratio of height of lead bar to gap of lead bar, R.

Gate density: number of lead bars per unit distance, N

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