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- The grid is placed between the patient and the image receptor. The grid absorbs scattered radiation and prevents the scatter from reaching and affecting the image receptor. When a grid is used, radiographic contrast increases. The grid is the primary factor used to decrease scatter and increase contrast.
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How does a grid reduce X-ray scatter?
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When a grid is used to reduce x-ray scatter it increases the contrast by a contrast improvement factor (k), but additional radiation dose is needed to compensate for the photons blocked by the grid (Bucky Factor).
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In 1913, Dr. Gustave Bucky invented a device called the grid. The grid is placed between the patient and the image receptor. The grid absorbs scattered radiation and prevents the scatter from reaching and affecting the image receptor. When a grid is used, radiographic contrast increases.
The antiscatter grid plays an important role for enhancing image quality in projection radiography by transmitting a majority of primary radiation and selectively rejecting scattered radiation.
Antiscatter grids improve the X-ray image contrast at a cost of patient radiation doses. The choice of appropriate grid or its removal requires a good knowledge of grid characteristics, especially for pediatric digital imaging.
Grid Changes. When a grid is used or the grid ratio is changed the goal is to change the amount of scattered radiation on the radiograph and this changes radiographic contrast. Scattered radiation also increases the IR exposure.
Feb 27, 2016 · Radiographic grids are used to improve radiographic image quality by absorbing scatter radiation that exits the patient, reducing the amount of scatter reaching the IR. It should be noted that grids do nothing to prevent scatter production; they merely reduce the amount of scatter reaching the IR.
Jan 1, 2023 · An anti-scatter grid is often used in X-ray radiography to reduce the scattered X-rays generated from the patient. However, the presence of a grid means the patient dose subsequently increases. Recently, several manufacturers have developed software that is capable of correcting for scattered X-rays without the use of a conventional grid. This ...