Method for adaptively modulating the power level of an x-ray tube of a computer tomography (CT) system
US5822393A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 1, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/544
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a method for adaptively modulating the power level of an x-ray tube of a computer tomography (CT) system for reducing an x-ray dose of an x-ray beam radiating through a patient and reaching detector means of said CT system during the acquisition of projections of body slices of the patient, the value of the maximum attenuation level per projection is established out of the patient projection data acquired for the respective projection and stored in a memory. The value of the maximum attenuation level for the next projection is predicted based on at least one of the stored values of the maximum attenuation levels and the respective power level of the x-ray tube for the next projection is established. Finally the respective power level of the x-ray tube for the next projection is accordingly adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.