What is the movable grid structure?
Divided into metal and non-metal by material. Non-metallic mesh grids are filled with non-metallic content such as plastics, paper sheets, etc., and their moisture resistance is weak. The metal content of the grid is separated by a metal material such as aluminum, which is resistant to moisture.
![](https://www.x-raygrid.com/Pic-Blog/x-ray-grid4-300x300.jpg)
It is divided into fixed and mobile according to the motion mode: the fixed
grid has high requirements on the
grid density, because the
grid with too low
grid density is easy to cause lead shadow and affect the image. Therefore, fixed grids generally use high
grid density. The movable filter
grid, which may be referred to as a filter device, is composed of a filter
grid, a driving device and a tray. The driving device causes the
grid to start moving in a direction perpendicular to the direction in which the lead bars are arranged before the exposure until the exposure is completed. Post-stop can be very good to avoid lead shadows, so the movable
grid has low
grid density requirements and can be used with low
grid density grids.
Author:Alina