title: Extending reference scan drift correction to high-magnification high-cone-angle tomography.
abstract: The reference scan method is a simple yet powerful method for measuring spatial drift of the x-ray spot during a low-cone-angle μ-CT experiment. As long as the drift is smooth, and occurring on a time scale that is long compared to the acquisition time of each projection, this method provides a way to compensate for the drift by applying 2D in-plane translations to the radiographs. Here we show that this compensation may be extended to the regime of high-magnification, high-cone-angle CT experiments where source drift perpendicular to the detector plane can cause significant magnification changes throughout the acquisition.
authors.affiliation: Department of Applied Mathematics, The Australian National University, ACT, Australia. grm110@rsphysse.anu.edu.au
authors.forename: Glenn R
authors.initials: GR
authors.lastname: Myers
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Kingston
authors.forename: Trond K
authors.initials: TK
authors.lastname: Varslot
authors.forename: Adrian P
authors.initials: AP
authors.lastname: Sheppard
mesh_terms: D000465:Algorithms; D002119:Calcium Carbonate / Q000737:chemistry; D003952:Diagnostic Imaging / Q000379:methods; D004583:Electrons; D004867:Equipment Design; D009502:Neutrons; D055095:Optics and Photonics / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D011859:Radiography / Q000379:methods; D012016:Reference Values; D015203:Reproducibility of Results; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055114:X-Ray Microtomography / Q000379:methods*; D014965:X-Rays
chemical_list: D002119:Calcium Carbonate