{HEAD ~ This invention} relates to X ray collimator grids, and, more particularly, to a method of fabricating a collimator grid containing a silicon crystal mono crystalline substrate and to {TAIL ~ a mono crystalline silicon X ray collimator grid} formed thereby 
{ HEAD ~ This invention } relates to X ray collimator grids , and , more particularly , to a method of fabricating a collimator grid containing a silicon crystal mono crystalline substrate and to { TAIL ~ a mono crystalline silicon X ray collimator grid } formed thereby
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