A grid is placed between the patient and the X-ray film to reduce scattered radiation (mainly due to the Compton effect) reaching the detector, thereby increasing image contrast.
Grids are typically used where anatomical structures > 10 cm:
Abdomen, skull, spine (except lateral cervical spine), comparative studies, IVU, RGU, MCU, barium studies (including lateral cervical spine); breast (mammography): use a 4:1 grid ratio.
The Bucky coefficient is the ratio of radiation on the grid to the transmitted radiation, which indicates the increase in patient dose due to the use of the grid, usually 2 to 6.
The contrast improvement factor is the ratio between the contrast with and without the grid. Usually two. Image contrast can be improved by increasing the wire-to-grid ratio by increasing the height of the lead bars or reducing the gap. However, this results in increased X-ray tube loading and radiation exposure to the patient.
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Author：X Ray Grids Maker
Tel: +86 536-8882360
Company: Weifang Newheek Electronic Tech Co., Ltd.
Address: E Building of Future Star Scientific Innovation Industrial Zone of No.957 Wolong East Street, Yulong Community, Xincheng Sub-District Office, Weifang Hi-tech Zone, Shandong Province, China