3 papers
physics.optics2026
Paraxial diffusion-field retrieval. II. Fokker-Planck generalization of the transport-of-intensity equation
David M. Paganin, Kaye S. Morgan
The transport-of-intensity equation (TIE), namely the continuity equation associated with a coherent paraxial optical wavefield, is widely used for phase retrieval. It is a second-…
physics.med-ph2025
Signal-to-noise and spatial resolution in in-line imaging. 3. Optimization using a simple model
T. E. Gureyev, D. M. Paganin, H. M. Quiney
The problem of optimization of propagation-based phase-contrast imaging setups is considered in the case of projection X-ray imaging and three-dimensional tomography with phase ret…
physics.med-ph2025
Neutron Beam Shaping by Ghost Projection
Andrew M. Kingston, Alaleh Aminzadeh, Lindon Roberts +5
We present a method to shape a neutron beam and project any specified target image using a single universal patterned mask that is transversely displaced. The method relies on ``gh…