Which grid ratio is typically used for fluoroscopy?

The grid ratio used for fluoroscopy typically falls within the range of 6:1 to 10:1. This ratio effectively improves image quality by reducing the amount of scatter radiation reaching the image receptor, thereby enhancing the contrast of the images. In fluoroscopy, where continuous imaging is performed, achieving a clear and distinct image is crucial for accurate diagnosis and procedural guidance.

A grid ratio of 6:1 to 10:1 strikes a balance between minimizing scatter and maintaining sufficient x-ray transmission to ensure effective visualization of anatomy during real-time imaging. Higher grid ratios, such as 15:1, may provide better scatter reduction but can lead to increased patient dose, reduced image brightness, and potential issues with exposure time, making them less practical for the dynamic environments of fluoroscopy. Therefore, the choice of a grid ratio within the 6:1 to 10:1 range effectively supports the operational needs of fluoroscopic procedures while managing the trade-offs associated with image quality and radiation dose.