Automatic exposure control system for tomographic applications
US5432833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1994 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | May 19, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/44
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic exposure control system which regulates the power supplied to an x-ray source of a tomographic apparatus is disclosed. The system includes an x-ray source movably opposing an ionization chamber with a sweeping mechanism and a control for controlling the mechanism. A microprocessor which receives an input reference voltage and combines the voltage with a signal generated by the control to thereby produce a reference signal. This reference signal is then compared with a signal detected by the ionization chamber to determine an output error signal. Power supplied to the x-ray source is then adjusted based on this error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.