Patent ID: 7869573

Claim:
A method for fabricating a collimator assembly, said method comprising: forming a first collimator grid having a first surface and an opposing second surface from a plurality of adjacent layers of radiation-absorbing material, the first collimator grid defining a plurality of first cells, each first cell of the plurality of first cells aligned in a first direction and extending between the first surface and the second surface and through the plurality of adjacent layers of radiation-absorbing material; coupling a reinforcing layer to the formed first collimator grid such that the reinforcing layer extends across the plurality of first cells substantially perpendicular to the first direction; and coupling a second collimator grid to the reinforcing layer, the second collimator grid having a first surface and an opposing second surface, the second collimator grid defining a plurality of second cells extending between the first surface and the second surface, each second cell of the plurality of second cells substantially aligned with a respective first cell of the plurality of first cells of the first collimator grid.