ACQUISITION AND RECONSTRUCTION OF PROJECTION DATA USING A STATIONARY CT GEOMETRY

摘要

Systems and methods are provided for acquiring and reconstructing projection data that is mathematically complete or sufficient acquired using a computed tomography (CT) system. In one embodiment, a distributed source is provided as arcuate segments offset in the X-Y plane and along the Z-axis. In another embodiment, a set of projection data representative of a sampled portion of a cylindrical surface is provided. The set of projection data is reconstructed using a suitable cone-beam reconstruction algorithm. In another embodiment, two or more sets of spatially interleaved helical projection data are processed using helical interpolation. The helically interpolated set of projection data is reconstructed using a two-dimensional axial reconstruction algorithm or a three-dimensional reconstruction algorithm.