What is the effect of the grid of scattered rays?

We have already learned how the filter screen filters out the scattered lines, so what does the structure of the filter grid play?

Does the structural change of the grid affect the absorption of the scattered lines? If the part of the structure that affects the grid is related to the absorption of the scattered line? Let’s take a look at it.
As shown in the figure, the original emission line passes through the gap between the lead bars inside the filter grid, and the scattered scattered lines are mostly blocked by the filter lead strips (the strip shape is a lead strip, and the blank area is an adjacent filter line). The gap between the grids.) The grid is placed between the human body and the cassette, so the original emission line can reach the cassette through the gap between the lead bars of the grid and most of the scattered lines are blocked by the grid. Illuminate the cassette.

Author：Alina