But for analysis of some objects another scheme is more natural, when an x-ray source moves along a three-dimensional curve :
The mathematic problem is stated as a task to reconstuct the function of three variables from integrals along the straight lines crossing the given curve. This problem is solved for different classes of functions and types of curves:
[1],
[2],
[3],[4],[5],[7],[8],[10],[14], and [16]. Intensive
Studies are carried out nowadays. They are aimed at creation of constructive methods for solving such problems and development of apprioriatate algorithms: [11], [15], [18], [19].
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