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Proceedings Paper

Coded source neutron imaging
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Paper Abstract

Coded aperture techniques have been applied to neutron radiography to address limitations in neutron flux and resolution of neutron detectors in a system labeled coded source imaging (CSI). By coding the neutron source, a magnified imaging system is designed with small spot size aperture holes (10 and 100μm) for improved resolution beyond the detector limits and with many holes in the aperture (50% open) to account for flux losses due to the small pinhole size. An introduction to neutron radiography and coded aperture imaging is presented. A system design is developed for a CSI system with a development of equations for limitations on the system based on the coded image requirements and the neutron source characteristics of size and divergence. Simulation has been applied to the design using McStas to provide qualitative measures of performance with simulations of pinhole array objects followed by a quantitative measure through simulation of a tilted edge and calculation of the modulation transfer function (MTF) from the line spread function. MTF results for both 100μm and 10μm aperture hole diameters show resolutions matching the hole diameters.

Paper Details

Date Published: 7 February 2011
PDF: 10 pages
Proc. SPIE 7877, Image Processing: Machine Vision Applications IV, 78770M (7 February 2011); doi: 10.1117/12.876812
Show Author Affiliations
Philip Bingham, Oak Ridge National Lab. (United States)
Hector Santos-Villalobos, Oak Ridge National Lab. (United States)
Ken Tobin, Oak Ridge National Lab. (United States)


Published in SPIE Proceedings Vol. 7877:
Image Processing: Machine Vision Applications IV
David Fofi; Philip R. Bingham, Editor(s)

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