Patent · US Expired

Density nodule detection in 3-D digital images

US6909797B2 · kind B2 · utility

77Cited by

8References

27Claims

0Family size

Assignee

R2 Technology, Inc. · US

Inventors

Harlan Romsdahl · Rue de l'Église, US
Wei Zhang · Jingwei, CN
Alexander Schneider · Munich, DE

Key dates

Filing date	Nov 23, 2001
Grant date	Jun 21, 2005
Priority date	—
Expiry date	Nov 23, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG06V2201/03
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight regions for further analysis and processing. The transform dynamically adapts to various nodule sizes through the use of radial zones. A second stage uses a detailed gradient distribution analysis that only operates on voxels that pass a threshold of the first stage.

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