Which individual introduced the moving grid to reduce shadows in 1915?

Which individual introduced the moving grid to reduce shadows in 1915?

• A. Gustav Peter Bucky
• B. Hollis Elmer Potter
• C. Clarence Dally
• D. William H. Rollins

Answer: (B)

Moving grids address a specific artifact problem in radiography: when a grid is fixed, the thin lead strips can appear as visible shadows on the image. The solution was to have the grid move during exposure so the lines are averaged out, effectively eliminating those shadows and improving image contrast. Hollis Elmer Potter introduced this moving-grid concept in 1915, leading to the Potter-Bucky diaphragm system. The grid itself was originally conceived by Gustave Bucky, but the moving mechanism—the key part that removes the grid-line shadows—belongs to Potter. The other figures are not associated with introducing the moving grid.

Moving grids address a specific artifact problem in radiography: when a grid is fixed, the thin lead strips can appear as visible shadows on the image. The solution was to have the grid move during exposure so the lines are averaged out, effectively eliminating those shadows and improving image contrast. Hollis Elmer Potter introduced this moving-grid concept in 1915, leading to the Potter-Bucky diaphragm system. The grid itself was originally conceived by Gustave Bucky, but the moving mechanism—the key part that removes the grid-line shadows—belongs to Potter. The other figures are not associated with introducing the moving grid.