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

The primary purpose of using a grid in radiographic imaging is to reduce scatter radiation. Scatter radiation occurs when X-rays interact with tissues and structures in the body, leading to a degradation of image quality. By employing a grid, which consists of a series of lead strips, the radiographic system can absorb much of this unwanted scatter while allowing the primary X-ray beam to pass through. This results in an increase in the contrast of the image, making it clearer and more diagnostic.

While enhancing image contrast is a secondary benefit of using a grid, its main function is to minimize the impact of scatter radiation, thus correcting for potential blurring and improving overall image quality. Consequently, the use of a grid helps radiologists obtain more precise and accurate diagnoses from the captured images.