What pattern do linear grids use?

Linear grids utilize a parallel pattern for their design. In radiography, a grid is used to reduce the amount of scatter radiation that reaches the image receptor. By employing a linear, parallel pattern, these grids allow primary radiation to pass through while absorbing or deflecting scattered radiation that could degrade image quality.

This parallel alignment of the grid lines ensures that they are oriented in a consistent manner relative to the direction of the x-rays. The focus on this geometry allows for optimal imaging clarity and minimizes the “grid cutoff” phenomenon, which occurs when the x-ray beam is misaligned with the grid lines.

In contrast, other patterns like diagonal or circular configurations might introduce complexity and are not practical for standard radiographic practices, as they could either obstruct the primary beam more or create additional scatter rather than reducing it. Additionally, an X-shaped configuration would significantly complicate alignment and stability, therefore it is not a suitable method for a linear grid used in fluoroscopy.