How often must GRID UNIFORMITY/BUCKY GRIDS/Grid Cassettes/Clip-On Grids and Grid Alignment be tested?

• A. Annually
• B. Daily
• C. Monthly
• D. Semi-annually

Answer: (C)

Regular quality assurance for the grid system ensures both image uniformity and proper alignment. Grid uniformity checks verify that the grid transmits X-rays evenly across the field, so the image doesn’t show areas of uneven exposure due to the grid itself. Grid alignment checks ensure the grid sits correctly with the beam and the image receptor, preventing grid lines from causing cutoff or shading, especially at the edges.

These components can drift over time from handling, wear, or service, so they need periodic verification. Monthly testing strikes a practical balance: it detects gradual degradation before it affects image quality, without the overhead of daily checks. Daily testing isn’t usually necessary because changes aren’t expected to occur that rapidly, and waiting too long (semi-annual or annual) could allow issues to go unnoticed. So, monthly is the standard cadence for these grid-related tests.