摘要

A novel imaging mode of cone-beam volume CT is proposed in this paper. It adopts a raster scanning x-ray source on a trough-like surface, and a group of point detectors distributing on a large circle plus an orthogonal arc. Through a single rotation of the trough-like surface, a full set of projection data can be acquired and an accurate 3D image can be reconstructed. This paper describes the shape and dimension of the trough-like x-ray source and the configuration of detectors in detail, proves that this structure is satisfied with the completeness condition, and gives a reconstruction algorithm of 3-D image adapting to this structure. Computer simulations show that this structure could achieve optimal result in meeting the following requirements: minimum time of rotation, less Compton scatter, and fast image reconstruction speed while keeping the completeness condition to be realized.

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