Single-exposure directional dark-field x-ray imaging

Conventional x-ray imaging is limited by the resolution of the x-ray camera. Fortunately, tiny grains, pores or fibres that are invisible in a normal x-ray image can scatter the x-rays, creating what is known as a “dark-field” signal. This thesis presents a new x-ray imaging technique that can measure the x-ray dark field. The technique can reveal the presence of these tiny structures and even the direction that the fibres or tubes lie in. This is advantageous in that the experimental setup is simple and can capture an x-ray dark-field movie, revealing micron-scale changes that are otherwise invisible.