What is the primary purpose of using a grid in radiography?

The primary purpose of using a grid in radiography is to improve image contrast. Grids are designed to absorb scattered radiation that occurs when the X-ray beam passes through the patient. In radiographic imaging, scattered radiation can degrade the quality of the image by adding unwanted density, which can make the anatomic details less distinguishable. By utilizing a grid, the primary X-ray beam passes through while much of the scatter radiation is absorbed. This leads to a clearer and more defined image with better contrast, allowing for enhanced visualization of structures of interest.

While the grid does not directly enhance image brightness or minimize motion blur, improving contrast indirectly contributes to the overall quality of the image by facilitating better differentiation of tissues. Additionally, grids can sometimes lead to increased patient exposure due to the need for higher exposure techniques to compensate for the reduction in overall X-ray intensity when using the grid. However, their primary function remains the enhancement of contrast in the resulting images.