Back to Basics | X-Ray Grids
How to Recognize a Bad Grid
Moire Pattern: The image on the right. It’s created by the grid and detector interacting, like when you take a picture of a TV screen. Seeing a moire pattern means grid suppression is not working. This could be a software issue, or could be because the grid is not actually 103lpi.
Artifacts: Dropped, bent or damaged grids can create artifacts, usually as a short line or “slash” in the image where the lead and aluminum has separated.
“Cutoff”: The sides of the image are dark and may how lines. This is because the focal distance is wrong or the grid has been bent.
We have provided links to additional JPI grid content below:
