What is the primary purpose of using a grid in radiographic imaging?

The primary purpose of using a grid in radiographic imaging is to enhance contrast by absorbing scatter radiation. Scatter radiation occurs when X-rays interact with matter, such as patient tissue, and change direction, which can degrade the quality of the diagnostic image. By incorporating a grid in the imaging process, the grid works to absorb this scatter radiation while allowing the primary X-rays to pass through to the detector more effectively. This selective filtering improves the contrast of the final image, making it easier to differentiate between various anatomical structures.

While improving image brightness and increasing spatial resolution are important aspects of radiography, a grid specifically addresses the issue of scatter radiation to enhance image contrast. Reducing patient dose is also a critical consideration in radiographic imaging, but the primary function of a grid is not focused on dose reduction; rather, it targets the quality of the image produced by minimizing the impact of scattered rays.