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