Imaging method of X-ray computerized tomography and apparatus for X-ray computerized tomography
US5640462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1992 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Sep 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An imaging method of an X-ray computerized tomography (X-ray CT) comprising the steps of reconstructing a partial region including a region of interest from penetrating data of an object, extracting only shape information from the reconstructed image, setting a threshold function determined by resolution to the reconstructed image information which is equivalent to linear absorption coefficient distribution (density), extracting the reconstructed image information by making the information into bi-values or tri-values based on the threshold function or by differentiating the information, and extracting and imaging only a portion where the linear absorption coefficient distribution (density) changes stepwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.