In this chapter, we describe a new method of summation of projection data by G-rays, which is based on the concept of the point map of projections. For this concept, the map of each point on the Cartesian lattice N × N is considered in the form of a matrix which describes all A-rays passing through this point. Each point is considered as a particle on the lattice, which is described by the field which we call the field of the particle. This concept is then generalized for the G-rays, and the field functions are defined for the G-particles, that represent the image elements as particles, or the smallest squares on the lattice. The field functions of such particles define all G-rays passing through this particle. The consideration ...
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