The next Imaging and Optical Physics seminar will take place at 3.00 pm, Tuesday, September 11th at Monash University. Dr Janosch Rieger will present his work on Electrical Impedance Tomography and Dr David Paganin will present his work on X-ray Ghost Imaging.

IMAGING & OPTICAL PHYSICS SEMINAR

Tuesday 11 September 2018 @ 3.00pm to 4.30pm

Large Seminar Room 107, 10 College Walk, Clayton

3:00 pm - 3:30 pm: Dr Janosch Rieger (Monash University)

Title: A Galerkin-type approach to shape optimisation in the space of convex sets and its application to Electrical Impedance Tomography (EIT).

Abstract: In this talk, I will discuss spaces of polytopes with 
fixed outer normals and their use in theoretical and practical shape optimization. These spaces possess a natural system of coordinates, have properties similar to those of finite element spaces, and all admissible coordinates can be characterized by a linear inequality, which is handy both from an analytical as well as from a computational perspective.

The convex source support is a theoretical concept for the localisation of inhomogeneities in otherwise homogeneous material that was originally developed in the context of scattering and later transferred to electrical impedance tomography. I will show how spaces of polytopes can be used to approximate the convex source support of an EIT problem.

3:30 pm – 4 pm: Adjunct Prof. David Paganin (Monash University)

Title of the talk: X-ray Ghost Imaging
Abstract: Several recent results in x-ray ghost imaging will be outlined.  This is an unusual form of imaging in which all photons, that are used to form an image, are never registered by a position-sensitive detector.  Applications to one-, two- and three-dimensional objects will be reported, as well as some developments regarding the synthesis of images (both in ghost imaging, and more generally) via a linear combination of noise maps. 

[1] D. Pelliccia, A. Rack, M. Scheel, V. Cantelli and D.M. Paganin, "Experimental x-ray ghost imaging", Phys. Rev. Lett. 117, 113902 (2016).
[2] T.E. Gureyev, D.M. Paganin, A. Kozlov, Ya.I. Nesterets and H.M. Quiney, "Complementary aspects of spatial resolution and signal-to-noise ratio in computational imaging", Phys. Rev. A 97, 053819 (2018).
[3] D. Pelliccia, M.P. Olbinado, A. Rack, A.M. Kingston, G.R. Myers and D.M. Paganin, "Towards a practical implementation of X-ray ghost imaging with synchrotron light", IUCrJ 5, 428 (2018).

[4] D. Ceddia and D.M. Paganin, "On random-matrix bases, ghost imaging and x-ray phase contrast computational ghost imaging", Phys. Rev. A 97, 062119 (2018).

[5] A.M. Kingston, G.R. Myers, D. Pelliccia, I.D. Svalbe and D.M. Paganin, "X-ray ghost tomography: denoising, dose fractionation and mask considerations", arXiv:1804.03370 (2018).
[6] A.M. Kingston, D. Pelliccia, A. Rack, M.P. Olbinado, Y. Cheng, G.R. Myers and D.M. Paganin, "Ghost Tomography", arXiv:1806.01136 (2018).