Do you know the x-ray grid?
What kind of device is the x–ray grid? Do you know the x–ray grid?
From the appearance of the x–ray grid, the filter grids are generally a black flat plate with a thickness of 4 to 8 mm. The inner structure of the x–ray grid is formed by intersecting thin lead bars. Fill and locate the two lead bars with X–ray material and glue them together.
So how to judge the standard of the x–ray grid ? Among them, the exposure coefficient of the x–ray grid is a standard to measure the x–ray grid.
Exposure coefficient B means the ratio of exposure required to obtain the same density value when the filter grating is not used and when the x–ray grid is used. Generally speaking, the B value is between 2 and 6. When the performance of the x–ray grid is the same, the smaller the B value of the filter grating is, the better.
Use of x–ray grid: In X–ray photography, the x–ray grid are usually used when the limb thickness is more than 15 cm.