Patent · US Active

Iterative CT image filter for noise reduction

US8605977B2 · kind B2 · utility

3Cited by

1References

25Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Herbert Bruder · Hemhofen, DE
Rainer Raupach · Heroldsbach, DE

Key dates

Filing date	Sep 2, 2010
Grant date	Dec 10, 2013
Priority date	—
Expiry date	Jul 6, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30004
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method is disclosed for reconstruction of image data of an examination object from measured data, wherein the measured data was captured during a relative rotational motion between a radiation source of a computed tomography system and the examination object. Image data of the examination object is determined from the measured data. In at least one embodiment, new image data is obtained by noise-reducing processing of the image data, in which weighted high-pass filtering of the image data is performed, the weighting taking account of differences between pixel values of different pixels such that increasing differences result in a weaker high-pass effect. A noise-reducing smoothing of the image data is performed using the weighted high-pass filtering.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.