| 摘要 |
Through the present invention, an error between projection and back projection in CT image generation is reduced. The CT image generation device according to the present invention is provided with: an X-ray scanner provided with an X-ray source and a detector; a storage module including a detector data block, a weighting data block, and a parameter data block; and a processor module including a main processor, a weighting calculation unit, a weighting vector multiplication unit, and a separable footprint computation unit. A scanner stores scanned data as detector data in the detector data block, the weighting calculation unit acquires a geometry parameter from the parameter data block and calculates a weighting vector, and the main processor controls a projection/back projection angle loop using the geometry parameter. The weighting vector multiplication unit multiplies the detector data by a weighting vector and acquires a corrected detector value, and the separable footprint computation unit executes a separable footprint projection/back projection algorithm using the corrected detector value. |
