What is a characteristic of a non-focused grid?

A non-focused grid is characterized by its design that allows it to perform optimally over a range of source-to-image distances, especially in configurations involving longer distances and spot film devices. This attribute is significant because non-focused grids are constructed with grid strips that run parallel to each other rather than being angled towards a specific focal spot. Consequently, they do not have a designated focal range like focused grids, making them more versatile for varied distance applications, particularly in procedures that involve greater separations.

Such grids can effectively increase image contrast by reducing scatter radiation without the need for precise alignment with the X-ray tube's focal spot, making them practical for use in various clinical situations where the positioning might be more variable. This explains why a non-focused grid is beneficial for long source-to-image distances, where maintaining optimal image quality can be more challenging.

The distinct design features of non-focused grids and their applications in diagnostic imaging contexts set them apart and underline the importance of selecting the right type of grid depending on the specific requirements of the imaging situation.