Pencil beam coded aperture x-ray scatter imaging

We use coded aperture x-ray scatter imaging to interrogate scattering targets with a pencil beam. Observations from a single x-ray exposure of a flat-panel scintillation detector are used to simultaneously determine the along-beam positions and momentum transfer profiles of two crystalline powders (NaCl and Al). The system operates with a 3 cm range resolution and a momentum transfer resolution of 0.1 nm−1. These results demonstrate that a single snapshot can be used to estimate scattering properties along an x-ray beam, and serve as a foundation for volumetric imaging of scattering objects. © 2012 Optical Society of America OCIS codes: (340.7430) X-ray coded apertures; (110.7440) X-ray imaging; (110.3200) Inverse scattering; (110.1758) Computational imaging. References and links 1. D. J. Brady, Optical Imaging and Spectroscopy (Wiley-OSA, 2009). 2. S. R. Gottesman and E. E. Fenimore, “New family of binary arrays for coded aperture imaging,” Appl. Opt. 28, 4344–4352 (1989). 3. M. 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