If lead strips are 4.0 mm high and 0.25 mm apart, what is the grid ratio?

To determine the grid ratio, you need to understand the relationship between the height of the lead strips and the distance between them. The grid ratio is calculated by dividing the height of the lead strips by the distance between them.

In this case, the height of the lead strips is 4.0 mm, and the distance between the strips is 0.25 mm. By calculating the grid ratio, you would perform the following calculation:

Grid Ratio = Height of Lead Strips / Distance Between Strips

Grid Ratio = 4.0 mm / 0.25 mm

When you divide 4.0 by 0.25, you get 16. Therefore, the grid ratio is 16:1.

This ratio indicates how effectively the grid can reduce scatter radiation while allowing the primary beam to pass through. A higher grid ratio often corresponds to a greater ability to improve image quality by preventing scatter, which is particularly important in radiographic imaging.