MAS regulator circuit for high frequency medical X-ray generator
US4831642A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Sep 23, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/46
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A MAS regulating system for high frequency medical X-ray generator produces a control signal to stop the exposure when the milliamp-seconds delivered by the X-ray tube becomes equal to or greater than a desired maximum amount set by an operator. The system comprises a converter circuit for converting a signal corresponding to a desired MAS value set in by the operator into a first digital signal having a predetermined format. A digital integrator circuit integrates and converts the actual MA current in the X-ray tube to a digital MAS signal corresponding to the actual MAS value of the current in the X-ray tube and in the same predetermined format as the first digital signal. A comparing circuit compares the first and second digital signals and produces a control signal to stop the exposure when the second digital signal is greater than the first digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.