Patent · US Active

Automatic adaptive soft tissue thresholding for two-pass CT cone-beam artifact reduction

US8135197B2 · kind B2 · utility

1Cited by

6References

20Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Peter Forthmann · Latham, US
Michael Grass · Hanstedt, DE
Roland Proksa · Hamburg, DE

Key dates

Filing date	Oct 6, 2006
Grant date	Mar 13, 2012
Priority date	—
Expiry date	May 7, 2029

Classification

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

Abstract

Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image.

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