The grid type designed with lead strips and interspacers angled to match beam divergence is called which grid type?

The grid type designed with lead strips and interspacers angled to match beam divergence is called which grid type?

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

Answer: (B)

Focusing the grid geometry to the divergent X-ray beam is what this item is about. A focused grid has lead strips and the interspace material angled so the strips converge toward a focal point that matches the chosen source-to-image distance. This alignment lets the primary photons travel along the grid lines with minimal attenuation, while scatter is absorbed by the lead. Because the strips are angled to the beam’s divergence, grid alignment remains efficient at the intended SID and helps avoid grid cut-off at the edges when the patient is positioned correctly and the tube is centered. If the grid were parallel, the strips would run straight across and would not match the beam’s natural spread, leading to more pronounced grid cut-off unless the SID and centering are perfect. A crosshatch grid uses two perpendicular patterns, which doesn’t provide the same beam-divergence matching and can complicate image interpretation. A rhombic grid isn’t the standard arrangement used to converge with the beam’s divergence. Therefore, the grid designed to match beam divergence is a focused grid.

Focusing the grid geometry to the divergent X-ray beam is what this item is about. A focused grid has lead strips and the interspace material angled so the strips converge toward a focal point that matches the chosen source-to-image distance. This alignment lets the primary photons travel along the grid lines with minimal attenuation, while scatter is absorbed by the lead. Because the strips are angled to the beam’s divergence, grid alignment remains efficient at the intended SID and helps avoid grid cut-off at the edges when the patient is positioned correctly and the tube is centered.

If the grid were parallel, the strips would run straight across and would not match the beam’s natural spread, leading to more pronounced grid cut-off unless the SID and centering are perfect. A crosshatch grid uses two perpendicular patterns, which doesn’t provide the same beam-divergence matching and can complicate image interpretation. A rhombic grid isn’t the standard arrangement used to converge with the beam’s divergence. Therefore, the grid designed to match beam divergence is a focused grid.