The grid type with lead strips and aluminum interspacers angled to coincide with the divergence of the x-ray beam is called what?

• A. Parallel Grid
• B. Focused Grid
• C. Crosshatch Grid
• D. Rhombic Grid

Answer: (B)

Grids are used to reduce scattered exposure, and matching the grid’s geometry to the x-ray beam is key. When the lead strips and the spaces between them are angled to coincide with the natural divergence of the x-ray beam from the focal spot, you have a focused grid. This alignment minimizes grid cutoff and ensures uniform brightness across the image because the divergent rays pass between the strips rather than at oblique angles to them. Using a grid with parallel strips would cause cutoff at the edges unless the exact focal distance is maintained, while a crosshatch grid or a rhombic grid has different patterns and purposes and does not align with beam divergence in the same way.