The primary purpose of using a grid in radiography is to:

The primary purpose of using a grid in radiography is to reduce scattered radiation. Grids are designed to allow primary x-rays to pass through while absorbing a significant amount of the scattered rays that can degrade image quality. When x-rays interact with matter, such as tissue or bones, some of the x-rays are scattered in different directions. This scattered radiation can blur the image, reducing contrast and clarity. By implementing a grid, radiographers can improve the overall quality of the image by minimizing the effects of this scattered radiation.

Using a grid effectively enhances image contrast, which is crucial for diagnosing and evaluating medical conditions. This is particularly important in examinations where high contrast is needed to differentiate between various tissues or to identify abnormalities.