Open AccessFull-wave approach for x-ray phase imaging
Author(s) -
Yongjin Sung,
Colin J. R. Sheppard,
George Barbastathis,
Masami Ando,
Rajiv Gupta
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.017547
Subject(s) - paraxial approximation , optics , physics , phase (matter) , ray tracing (physics) , geometrical optics , physical optics , phase retrieval , wave propagation , phase imaging , tomography , high frequency approximation , beam (structure) , scattering , microscopy , quantum mechanics , fourier transform
We present a rigorous forward model for phase imaging of a 3-D object illuminated by a cone-shaped x-ray beam. Our model is based on a full-wave approach valid under the first Rytov approximation, and thus can be used with large and thick objects, e.g., luggage and human patients. We unify light-matter interaction and free-space propagation into an integrated wave optics framework. Therefore, our model can accurately calculate x-ray phase images formed with sources of arbitrary shape, and it can be effectively incorporated into x-ray phase tomography as a forward model. Within the best of our knowledge, this is the first non-paraxial, full-wave model for X-ray phase imaging.