Patent Number: 
Section: claims

1. A scattered ray removal grid formed in an overall shape of constant spherical curvature, prepared by a process comprising: forming a substantially flat-shaped grid having thermoplastic resin interposed between grid elements;  placing the grid between a set of dies having surfaces of complementary spherical curvature of prescribed radii, and  causing the set of dies to form the grid into a shape having spherical curvature of a prescribed radius by pressing and heating the grid to its softening temperature,  wherein the step of forming the substantially flat-shaped grid includes:  forming a laminate by alternately stacking and bonding layers of scattered ray absorbers and spacers;  slicing an end portion of the laminate perpendicularly to a stacked direction of the layers so that the scattered ray absorbers lie parallel to one another;  forming a second laminate by alternately layering the sliced end portions of the laminate with radiation absorption plates to form a lattice structure; and  slicing an end portion of the second laminate perpendicularly to a stacked direction of the layers to form the substantially flat-shaped grid. 2. The scattered ray removal grid according to  claim 1 , wherein the scattered ray absorbers are formed of a lead compound or a bismuth compound. claim 1 3. The scattered ray removal grid according to  claim 1 , wherein the spacer is formed of a polymer resin. claim 1