Polychromatic phase‐contrast computed tomography

Abstract

Polychromatic phase‐contrast radiography differs from traditional (absorption‐only) radiography in that the method requires at least a partially coherent x‐ray source and the resulting images contain information about the phase shifts of x‐rays in addition to the traditional absorption information. In a typical embodiment, this effect results in a measurable enhancement in image contrast at the edges of objects. In this study, a phase‐contrast imaging system was adapted to allow an object to be imaged at multiple projections, and these projections were used to generate phase‐contrast computed tomography images. The images obtained with this technique show edge enhancements surrounding the objects within the image.