Determination of direct x-ray exposure regions in digital medical imaging
US5606587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1996 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Mar 21, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of determining direct x-ray exposure regions in digital medical imaging comprising the steps of: providing a digital medical image including a matrix of lines and columns of pixels; evaluating significant transitions in line and column profiles to determine appropriate line and column thresholds; evaluating all pixels which exceed the line/column threshold for structure by computing the variation within a moving window using a range statistic; accumulating within a histogram pixels which exceed a threshold for that particular line or column and which contain variation indicative of direct x-ray exposure; and analyzing the background histogram to determine the beginning intensity or code value (left point) of the background region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.