| 摘要 |
Using helical cone beam (114) scanning, a nutating slice CT system generates three-dimensional projection data and reconstructs a series of planar image slices (132) having equal tilt angles ( theta ) and changing rotation angles with respect to the longitudinal axis of the scanned object, causing the normals to nutate and process about the longitudinal axis (Z). Conventional two-dimensional reconstruction is used, since the projection data (130) of the tilted slices (132) is one-dimensional fan beam data. Two-dimensional images may be created at stationary projection angles. Nutation or tilt of voxels may be compensated, and parallel processing may be used. |
