Patent · US Expired

Histogram-based image filtering in computed tomography

US6819735B2 · kind B2 · utility

7Cited by

2References

32Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Herbert Bruder · Hemhofen, DE
Thomas Flohr · Uehlfeld, DE
Rainer Raupach · Heroldsbach, DE

Key dates

Filing date	Jun 27, 2003
Grant date	Nov 16, 2004
Priority date	—
Expiry date	Jun 27, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S378/901
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method is for organ-specific image optimization in computed tomography. In this case, the HU values of a layer of the body previously recorded with a CT device are calculated and, on this basis, a first CT image is created. For this first CT image, a histogram is also created, in which the frequency distribution of the HU values is reproduced. In a histogram, at least one organ-specific HU region is defined and the latter is allocated an HU-dependent transfer function. Furthermore, a second CT image is created on the basis of the previously calculated HU values for the layer of the body which has been recorded. The first and second CT image are filtered with the HU-dependent transfer function and, finally, the filtered first CT image is mixed with the filtered second CT image.

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