Patent Number: 
Section: claims

1. An X-ray scatter reduction grid, comprising: d 2 = d 1 * F+h/F,  where d 1  is said first distance, d 2  is said second distance, F is a distance from the radiation source to said first layer, and h is a height of said first layer. a first layer including a first plurality of cells, each of said first plurality of cells having a center and a perimeter, said perimeter comprising an X-ray absorbing material, wherein a circle circumscribed about one of said first plurality of cells has a radius equal to a first distance;  a second layer including a second plurality of cells, each of said second plurality of cells having a center and a perimeter formed of an X-ray absorbing material, wherein a circle circumscribed about one of said second plurality of cells has a radius equal to a second distance, said second distance being greater than said first distance;  wherein said second layer is positioned with respect to said first layer such that an X-ray passing through the center of a first layer cell will also pass through the center of a second layer cell;  wherein said perimeters have a shape selected from the group consisting of a triangle, a trapezoid, a rhombus, a pentagon, a hexagon, a heptagon, and an octagon; and  wherein said second distance is about a multiple of said first distance according to the following formula 2. The X-ray scatter reduction grid of  claim 1 , wherein: claim 1 said second layer is operatively coupled to said first layer. 3. The X-ray scatter reduction grid of  claim 1 , further comprising: claim 1 a layer of supporting material intermediate said first layer and said second layer. 4. An X-ray scatter reduction grid, comprising: a first layer including a first plurality of cells, each of said first plurality of cells having a center and a perimeter, said perimeter comprising an X-ray absorbing material, wherein a circle circumscribed about one of said first plurality of cells has a radius equal to a first distance;  a second layer including a second plurality of cells, each of said second plurality of cells having a center and a perimeter formed of an X-ray absorbing material, wherein a circle circumscribed about one of said second plurality of cells has a radius equal to a second distance, said second distance being greater than said first distance;  wherein said second layer is positioned with respect to said first layer such that an X-ray passing through the center of a first layer cell will also pass through the center of a second layer cell;  wherein said perimeters have a shape selected from the group consisting of a triangle, a trapezoid, a rhombus, a pentagon, a hexagon, a heptagon, and an octagon;  wherein said first layer has a first height; and  said second layer has a second height, said second height being greater than said first height. 5. The X-ray scatter reduction grid of  claim 4 , wherein: claim 4 said second layer is operatively coupled to said first layer. 6. The X-ray scatter reduction grid of  claim 4 , further comprising: claim 4 a layer of supporting material intermediate said first layer and said second layer.