A novel volume CT with x-ray on a trough-like surface and point detectors on circle-plus-arc curve

A novel imaging mode of cone-beam volume CT is proposed. It adopts a raster scanning x-ray source on a trough-like surface, and a group of point detectors distributed 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 3-D 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, proving that this structure is satisfied by the completeness condition, and gives a reconstruction algorithm for the 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.