X-Ray image pick-up device
US4562586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | May 16, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An X-ray image pick-up device includes an X-ray source for radiating X-rays onto an object including a region of interest, an image intensifier for converting to an optical image an X-ray image obtained when the X-rays radiated from the X-ray source are transmitted through the object, an image pick-up camera for converting to an image pick-up signal the optical image which is generated from the image intensifier, and an optical diaphragm arranged between the image intensifier and the image pick-up camera for adjusting an amount of optical image light incident on the image pick-up camera. The X-ray image pick-up device further includes an exposure controller for detecting both the maximum value of image pick-up signals from the pick-up camera and the average value of the image pick-up signals in the region of interest at a time of fluoroscopic examination, for calculating the density resolutions of the output pick-up signals from the image pick-up camera with respect to the various combinations of tube voltages, tube currents and optical diaphragm values, and for determining a tube voltage and a tube current of an X-ray source, along with an optical diaphragm value so as to provide …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.