Method for reconstructing CT image data

Details Method for reconstructing CT image data Method for reconstructing CT image data

2011-08-23

2011-08-23

Tabatabai, Abolfazl (Department: 2800)

Image analysis

Applications

Biomedical applications

C378S004000, C600S425000

Reexamination Certificate

active

08005286

ABSTRACT:
A method is disclosed for reconstructing CT image data. In at least one embodiment, the method includes provisioning CT projection data p. Secondly, it includes reconstruction of first image data fk=1based on the CT projection data p. Thirdly, it includes iterative determination of k+1-th CT image data fk+1on the basis of the first CT image data fk=1as a function of: k-th CT image data fk, a reconstruction of differential projection data, the differential projection data being produced as the difference between reprojected CT image data fkand the CT projection data p, as well as a local contrast-dependent smoothing of the CT image data fkusing a non-quadratic correction operator R(fk). Besides suppressing “cone” artifacts, the proposed method of at least one embodiment exhibits a significant reduction in image noise after just a few iterations.

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German Office Action dated Jul. 21, 2009.

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