US5513252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental x-ray diagnostics installation
Assignee: Sirona Dental Systems GmbH
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Filing: 1993-04-27
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Granted: 1996-04-30
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Expires: 2013-04-27
Abstract
Abstract In a dental x-ray diagnostics installation that includes an x-ray radiator, an image detector arranged diametrically relative thereto a CCD following the subject to be transirradiated in radiation direction, control electronics with a control part for driving the image detector, an image processing unit that edits the signals acquired from the image detector, and an operating device with which the x-ray radiator can be switched on and off, the image detector is continuously read out with a clock generator and the incoming data read from the detector are constantly subjected to a threshold check. The image detector is operated in a read-out mode when the x-ray radiator is switched off and is switched into an exposure mode given the presence of radiation and the upward transgression of a defined threshold, and vice versa.
Inventors
- 👤 Eriks Blaschka
- 👤 Ulrich Schulze-Ganzlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:03
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/51; A61B6/512; H; H04; H04N; H04N23/00; H04N23/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A dental x-ray diagnostics installation comprising: an x-ray source; x ray source control means for selectively activating said x-ray source to cause said x-ray source to emit x-rays, and for deactivating said x-ray source; an image memory; a CCD image detector disposed opposite said x-ray source; clock generator means for operating said CCD x-ray image detector in an exposure mode wherein said CCD x-ray image detector integrates charge produced by x-rays emitted by said x-ray source which are incident on said CCD image detector to produce x-ray image data, and in a read-out mode wherein said x-ray image data are read from said CCD x-ray image detector and entered into said image memory; threshold means continuously supplied with said x-ray image data for continuously comparing said x-ray image data to a threshold which is exceeded when said x-ray source is activated by said x-ray source control means and for causing said clock generator means to operate said CCD x-ray image detector in said exposure mode when said threshold is exceeded and otherwise to operate said CCD x-ray image detector in said read-out mode, said threshold means being unconnected to said x-ray source control means; means including said image memory for processing said x-ray image data to produce display signals therefrom; and means supplied with said display signals for presenting a visual display of said x-ray image data.
Claim 2
Dependent Claim
227 words
A dental x-ray diagnostics installation comprising: an x-ray source; x ray source control means for selectively activating said x-ray source to cause said x-ray source to emit x-rays, and for deactivating said x-ray source; an image memory; a CCD image detector disposed opposite said x-ray source; clock generator means for operating said CCD x-ray image detector in an exposure mode wherein said CCD x-ray image detector integrates charge produced by x-rays emitted by said x-ray source which are incident on said CCD image detector to produce x-ray image data, and in a read-out mode wherein said x-ray image data are read from said CCD x-ray image detector and entered into said image memory; threshold means continuously supplied with said x-ray image data for continuously comparing said x-ray image data to a threshold which is exceeded when said x-ray source is activated by said x-ray source control means and for causing said clock generator means to operate said CCD x-ray image detector in said exposure mode when said threshold is exceeded and otherwise to operate said CCD x-ray image detector in said read-out mode, said threshold means being unconnected to said x-ray source control means; means including said image memory for processing said x-ray image data to produce display signals therefrom; and means supplied with said display signals for presenting a visual display of said x-ray image data.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |