Methods and apparatus for modulating x-ray tube current
US5696807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/44
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention, in one form, is a system for modulating x-ray tube current as a function of gantry angle and slice location in a computed tomography system. In one embodiment, a desired noise level for a final image is selected, and a desired minimum x-ray photon reading and a desired average x-ray photon reading are identified to produce an image in accordance with the desired noise level. During scanning, actual x-ray photon readings are used with the desired average x-ray photon reading and the desired minimum x-ray photon reading to generate an x-ray modulating factor. This modulating factor is then used to modulate the x-ray tube current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.