Patent ID: 6185278
Filing Date: 2001-02-06
Classification: G21K

Abstract:
A focused radiation collimator for collimating radiation emitted from a radiation point source located at a substantially known focal distance from the collimator, the collimator comprising:N collimator layer groups, where N is an integer greater than one, aligned, stacked and bonded together immediately adjacent to one another to form a collimator body, each of the N collimator layer groups having a plurality of layer group passages arranged there through in a predetermined pattern which is unique to the layer group but which, with the passages of other collimator layer groups in the aligned stack of N collimator layer groups, additively form a plurality of collimator through channels which are substantially aimed at the radiation point source, and wherein each of the collimating layer groups further comprises:M substantially identical radiation absorbing layers, where M is an integer greater than one, aligned, stacked and bonded together immediately adjacent to one another, each of the M substantially identical radiation absorbing layers having a plurality of openings arranged there through in substantially the same predetermined pattern which, with the plurality of openings of the other radiation absorbing layers in the aligned stack of M substantially identical radiation absorbing layers, additively form the layer group passages.