Method, tube and system for eliminating a fixed antiscatter grid in a radiological image
US5195120A · kind A · utility
4Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Dec 23, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a radiological apparatus using an antiscatter grid, this grid is kept fixed instead of being movable, and its image is removed by irradiating it as well as the object to be examined by two X-ray sources that have to be separated by a distance b determined by the first zero of the modulation transfer function of this two-source system. To take account of the magnification G, the distance b can be adjusted by means of a cathode emitting two electron beams with adjustable deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.