Phase-contrast imaging using hard x-rays

The applications of phase-contrast x-ray imaging and the physics behind the image formation are described and demonstrated. A new method of achieving phase contrast is presented. It relies on the use of a microfocus X-ray tube which produces a spherical wavefront. This wavefront is then distorted by the passage through the object and the resulting image is recorded by two-dimensional detector. The technique is particular suitable for highlighting edges or boundaries. 8 refs., 7 figs