COMPUTED TOMOGRAPHY IMAGE RECONSTRUCTION

摘要

Approaches for performing computed tomographic image reconstruction are described. In one embodiment, a full or almost full scan of scan data is acquired and a plurality of image reconstructions are performed based on the scan data, wherein the plurality of image reconstructions result in a corresponding plurality of image volumes wherein the image reconstructions use different view weighting functions. Further, the present approaches provide for combining the plurality of image volumes together to produce a final image volume.

主权项

1. A method of reconstructing a computed tomography (CT) image, the method comprising:
acquiring a set of projection data for an imaged volume using a CT imaging system; reconstructing at least a first intermediate reconstruction and a second intermediate reconstruction using the acquired set of projection data, wherein the first intermediate reconstruction and the second intermediate reconstruction are reconstructed using different view weightings; masking the first intermediate reconstruction and the second intermediate reconstruction to select different subdivisions of image data; applying a frequency transform to transform each subdivision of image data to frequency space; masking the frequency transform of each subdivision to select frequency information of interest for each of the first intermediate reconstruction and the second intermediate reconstruction; for each subdivision, combining the frequency information selected from the first intermediate reconstruction with the frequency information selected from the second intermediate reconstruction to generate a fully sampled frequency space; and applying an inverse frequency transform to the fully sampled frequency space to generate a final image volume.