Patent ID: 6928146

Claim:
A method for making a marking grid for radiographic imaging, comprising the steps of: providing a substrate attached to a releasable backing, the substrate having a front side and a back side, the back side being releasably attached to the releasable backing, and the releasable backing defining a plurality of apertures spaced relative to each other along at least one marginal portion thereof; registering the substrate and backing with at least one of a tool for cutting the substrate, and a tool for applying a material that is at least partially radiopaque to the substrate, by engaging the apertures in the backing with at least one rotatably driven drive member registered with the at least one tool; and moving the substrate and backing relative to the at least one tool by rotatably driving the drive member, and moving the tool relative to the substrate to perform at least one of the following additional steps: (a) applying a material that is at least partially radiopaque to the substrate at predetermined locations on the substrate, and (b) forming apertures in the substrate extending between the predetermined locations of the at least partially radiopaque material on the substrate.