This paper describes a fan beam coded aperture x-ray scatter imaging system that acquires a tomographic image from each snapshot. This technique exploits the cylindrical symmetry of the scattering cross section to avoid the scanning motion typically required by projection tomography. We use a coded aperture with a harmonic dependence to determine range and a shift code to determine cross range. Here we use a forward-scatter configuration to image 2D objects and use serial exposures to acquire tomographic video of motion within a plane. Our reconstruction algorithm also estimates the angular dependence of the scattered radiance, a step toward materials imaging and identification.
© 2013 Optical Society of America
Original Manuscript: February 11, 2013
Manuscript Accepted: April 5, 2013
Published: June 26, 2013
Vol. 8, Iss. 8 Virtual Journal for Biomedical Optics
Kenneth P. MacCabe, Andrew D. Holmgren, Martin P. Tornai, and David J. Brady, "Snapshot 2D tomography via coded aperture x-ray scatter imaging," Appl. Opt. 52, 4582-4589 (2013)
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