Scanning radiographic method
US4323779A · kind A · utility
Inventor
Key dates
| Filing date | Dec 5, 1979 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Dec 5, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/66
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Visual display of dental, medical or other radiographic images is realized with an X-ray tube in which an electron beam is scanned through an X-Y raster pattern on a broad anode plate, the scanning being synchronized with the X-Y sweep signals of a cathode ray tube display and the intensity signal for the display being derived from a small X-ray detector which receives X-rays that have passed through the subject to be imaged. Positioning and support of the detector are provided for by disposing the detector in a probe which may be attached to the X-ray tube at any of a plurality of different locations and by providing a plurality of such probes of different configuration in order to change focal length, to accommodate to different detector placements relative to the subject, to enhance patient comfort and to enable production of both periapical images and wider angle pantomographic images. High image definition with reduced radiation dosage is provided for by a lead glass collimator situated between the X-ray tube and subject and having a large number of spaced-apart minute radiation transmissive passages convergent on the position of the detector. Releasable mounting means enable …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.