Automatic X-ray exposure device incorporating automatic desired measuring field selection
US3995161A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Mar 11, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/26
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to an automatic X-ray exposure device having a measuring member, for example, an ionization chamber comprising a large number of measuring fields, for example, 5 .times. 5. Each measuring field is associated with a capacitor which, during television fluoroscopy, receives the part of the video signal which is derived from the part of the television image in which the dose or the dose power is to be measured in the associated measuring field. Therefore, the capacitors having the highest and the lowest voltage, respectively, have associated therewith the measuring fields having the largest and the smallest, respectively, dose or dose power. Subsequently, the measuring fields whose dose or dose power is situated in a given organ-dependent range between a maximum and a minimum value are determined and actuated for the automatic exposure in a subsequent exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.