Tantalum air-interspace crossed grid: design and performance characteristics.

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Abstract
A large-area crossed grid system using 0.1-mm-thick Ta strips was evaluated. Its performance characteristics were compared with those of a conventional 12:1 linear grid, a conventional crossed 6:1 crossed grid, and a slit radiography machine combined with a conventional 6:1 grid. The Ta crossed grid provided a high level of scatter cleanup (comparable to some slit radiography methods), but had tube loading and exposure time requiremnets similar to those of conventional anti-scatter grids.