Apparatus for matching x-ray images with reference images
CA 2270357 A1 · Owner: University Of Pittsburgh Of The Commonwealth System Of Higher Education · Inventors: Shimoga, Karun B.; Greenberger, Joel; Kanade, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
X-ray images (53) such as radiotherapy portal images and simulation images (45) are matched by apparatus (27) which digitizes the images and automatically processes the digitized signals to generate matched digitized signals which can be displayed for comparison. The digitized images are first coarse aligned (33) using a transform generated from seed points selected interactively (110) from the two images or through detection and identification (120) of x-ray opaque fiducials placed on the patient. A fine alignment (35) is then performed by first selecting intersecting regions of the two images (150) and enhancing those regions (154). Secondly an updated , transform is generated …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.