Speaker
Description
Speckle-based phase-contrast X-ray imaging (SB-PCXI) is capable of reconstructing sample information below the imaging system’s spatial resolution. Since its realisation in 2012 [1,2], there has been significant development in the experimental implementation and theoretical formalism of SB-PCXI. We have been investigating how the concept of “local energy conservation” can be used to reconstruct various signals from a sample- an approach termed Multimodal Intrinsic Speckle-Tracking (MIST). MIST combines the Fokker-Planck description of paraxial X-ray propagation [3] with a geometric-flow formalism for speckle-tracking [4] to consider both coherent and diffusive effects. We have developed several approaches in the quest to solve the SB-PCXI inverse problem [5-8]. This involves reconstructing quantitative and qualitative sample information from detector-measured intensity SB-PCXI data. Initial attempts to solve this inverse problem considered only the coherent channel of energy-flow, from which an algorithm to reconstruct a sample’s projected-thickness was derived [5]. We currently present an algorithm capable of reconstructing the directional diffusive scattering signal from unresolved-microstructure [8]. This presentation will focus on the development of MIST, future research directions, as well as the wider application of SB-PCXI as a viable imaging technique.
[1] Bérujon, S. et al. Phys. Rev. Lett. 108(15), 158102 (2012).
[2] Morgan, K.S. et al. Appl. Phys. Lett. 100(12), 124102 (2012).
[3] Paganin, D.M. et al. Sci. Rep. 9(1), 17537 (2019).
[4] Paganin, D.M. et al. Phys. Rev. A, 98(5), 053813 (2018).
[5] Pavlov, K.M. et al. Phys. Rev. Appl. 13(5), 054023 (2020).
[6] Pavlov, K.M. et al. J. Opt. 22(12), 125604 (2020).
[7] Alloo, S.J. et al. J. Med. Imaging 9(3), 031502 (2022)
[8] Pavlov, K.M. et al. Phys. Rev. A, 104(5), 053505 (2021).
| Presenter Gender | Woman |
|---|---|
| Students Only - if available would you be interested in student travel funding | Yes |
| Pronouns | She/Her |
| Do you intend to attend UM2022 | In person - Melbourne |
| Students Only – Do you wish to take part in the Student Poster Slam | No |
| Level of Expertise | Student |
| Terms and conditions (Please confirm that you have read all the requirements and agree to the conditions) | Yes |
