There are two predominant full field X-ray imaging techniques, Absorption Contrast and Phase Contrast imaging.
A single absorption contrast or phase contrast image is also known as a projection. If multiple projections are taken of the same sample at different orientations by rotating the sample they can be constructed into a 3-dimensional image or Tomogram.
Using 1000s of tomography images, over a 180 degree rotation, three-dimensional reconstructions can be created of the internal sample volume which makes it possible to view any cross-section of the virtual image at any angle.
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