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- Nevertheless, the general consensus has been that antiscatter grids improve image quality for the majority of breast types and sizes. There is, however, inconsistency in the literature, and recent results show that a substantial image quality improvement can be achieved even for thick breasts if the grid is disposed of.
www.ncbi.nlm.nih.gov/pmc/articles/PMC4478855/
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The SIF IQ values found from image quality measurement suggest the removal of the grid for 5 cm and 10 cm block thicknesses regardless of the grid type and tube voltage, and this recommendation even holds for 15 cm thickness.
Feb 17, 2015 · The theoretical analysis shows that for a thinner PMMA, < 3.3 to 4.4 cm, removing the grid could reduce the dose without degrading image quality, whereas for a thicker PMMA, > ∼ 4.4 cm, the grid provides benefit and should be kept.
- Han Chen, Mats E. Danielsson, Cheng Xu, Björn Cederström
- 10.1117/1.JMI.2.1.013501
- 2015
- 2015/01
Apr 15, 2019 · A grid is one of the key components of a digital radiography (DR) system because it removes scattered radiation, which arises when X-rays penetrate an object and improves diagnostic accuracy by enhancing image quality.
- Sanghyun Lee, Woohyun Chung
- 2019
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). Table Of Contents. X-Ray scatter description. Collimation. Thickness Dependence. KVP Dependence. Air Gap. Anti-scatter Grids. Summary.
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.
Jun 19, 2023 · In our results, assuming that the grid artifact can be neglected, a low strip frequency grid should be employed to improve image contrast, whereas a high strip frequency grid should be employed to suppress radiographic noise degradation.
