How often must GRID UNIFORMITY / BUCKY GRIDS / GRID CASSETTES / CLIP-ON GRIDS and GRID ALIGNMENT be evaluated?

How often must GRID UNIFORMITY / BUCKY GRIDS / GRID CASSETTES / CLIP-ON GRIDS and GRID ALIGNMENT be evaluated?

• A. Monthly
• B. Biannually
• C. Annually
• D. Weekly

Answer: (C)

Grid performance in radiography ensures scatter is reduced without introducing artifacts, and that means both how the grid attenuates scatter across the field and how it stays aligned with the beam and image receptor. Checking grid uniformity confirms the image brightness is consistent across the field when a grid is used, so there isn’t shading or uneven exposure caused by a faulty grid or a degraded cassette. Verifying grid alignment, whether with bucky grids, grid cassettes, or clip-on grids, ensures the lines of the grid are properly positioned relative to the beam and receptor; misalignment can cause grid cutoff, especially at the edges, which degrades image quality. These checks are typically performed on an annual basis as part of routine quality assurance because grids and their holders are generally robust, and a problem usually becomes evident through imaging artifacts or during other routine inspections. More frequent checks would be needed only if prior issues were found, after servicing or grid changes, or if a facility has a more conservative QA schedule.

Grid performance in radiography ensures scatter is reduced without introducing artifacts, and that means both how the grid attenuates scatter across the field and how it stays aligned with the beam and image receptor. Checking grid uniformity confirms the image brightness is consistent across the field when a grid is used, so there isn’t shading or uneven exposure caused by a faulty grid or a degraded cassette. Verifying grid alignment, whether with bucky grids, grid cassettes, or clip-on grids, ensures the lines of the grid are properly positioned relative to the beam and receptor; misalignment can cause grid cutoff, especially at the edges, which degrades image quality.

These checks are typically performed on an annual basis as part of routine quality assurance because grids and their holders are generally robust, and a problem usually becomes evident through imaging artifacts or during other routine inspections. More frequent checks would be needed only if prior issues were found, after servicing or grid changes, or if a facility has a more conservative QA schedule.