How is "grid ratio" defined in relation to radiographic grids?

Grid ratio is defined as the height of the lead strips divided by the width of the interspaced material. This ratio is a critical factor in determining the grid's effectiveness at reducing scatter radiation and improving image contrast on radiographic films. A higher grid ratio indicates taller lead strips relative to the space between them, making the grid more efficient at absorbing scattered x-rays that do not contribute to the image.

As the grid ratio increases, the ability of the grid to prevent scatter and improve image quality also increases, but it is essential to use the appropriate technical factors, as higher grid ratios may require higher exposure settings to achieve optimal radiographic results. The significance of understanding grid ratio lies in its impact on image quality and the technical adjustments required in x-ray exposure.