Method for producing tomographic images using direct Fourier inversion
US4991093A · kind A · utility
22Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Aug 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/612
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is a method for examining at least a portion of an object using penetration radiation. The method includes the steps of transmitting radiation from an external source through the object in a plurality of coplanar rays, detecting the attenuated transmitted radiation after it has passed through the object, determining the projection data for said rays, and inverting said projection data to generate the distribution of the attenuation coefficient, wherein said inverting step includes the Direct Fourier Inversion Method such that the projection data is padded and the Fourier coefficients are filtered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.