title: Snapshot 2D tomography via coded aperture x-ray scatter imaging.
abstract: 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.
authors.affiliation: Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA.
authors.forename: Kenneth P
authors.initials: KP
authors.lastname: MacCabe
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Holmgren
authors.forename: Martin P
authors.initials: MP
authors.lastname: Tornai
authors.forename: David J
authors.initials: DJ
authors.lastname: Brady
mesh_terms: D000042:Absorption; D000465:Algorithms; D002138:Calibration; D004867:Equipment Design; D007091:Image Processing, Computer-Assisted; D012542:Scattering, Radiation; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods; D014965:X-Rays