Abstract:
Digital tomosynthesis is the procedure of digital reconstruction of object internal structure from the set of X-ray projection images [1]. Reconstruction algorithms in tomosynthesis are very similar to algorithms used in CT and include shift-and-add, filtered backprojection, algebraic methods and MLEM. The principal difference between CT and tomosynthesis is that tomosyntesis uses only a limited angular subset of projection images for reconstruction, typically 30°...90°, whereas CT uses projections taken from every side of the imaged object – 180°. Another difference is that to succeed in tomosynthesis technology one needs a high-speed dynamic digital flat x-ray detector. This makes tomosynthesis similar to cone-beam computed tomography. The simplicity of techological implementation allows to introduce it into x-ray laminography equipment, also known as classical tomography. Very promising health technology is mammographic tomosynthesis.
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