Which type of grid is suitable for long SID shots and portable devices?

The non-focused grid is particularly well-suited for long source-to-image distance (SID) shots and portable devices due to its design characteristics. Unlike focused grids that require alignment with the central ray of the x-ray beam for optimal image quality, non-focused grids can effectively absorb scatter radiation across a wide range of angles. This makes them flexible and convenient for use in various situations, including long-distance imaging, where precise alignment may be challenging.

In portable settings, where the equipment might not be stabilized and alignment cannot be guaranteed, the non-focused design allows for acceptable image quality without the need for meticulous positioning. This is advantageous for scenarios such as mobile imaging in patient rooms or emergency departments, where quick and efficient procedures are critical.

Other grid types, such as stationary or dynamic grids, serve different functions and may not provide the same level of effectiveness in dealing with scatter radiation under varying conditions. A focused grid, while effective at shorter distances, requires a more precise relationship to the x-ray beam and is therefore less suitable for long SID scenarios or portable applications.