Device for measuring the spatial distribution of absorption in a body
CA 1072688 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Wagner, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The known computer tomography apparatus always produce a complete image of the absorption distribution in the whole slice of the body examined. However, the radiologist is often interested only in a part of the slice (diagnostic region). For second and third generation apparatus the invention enables examination in mainly only the diagnostic region, while reducing the radiation load in the part of the slice situated outside the diagnostic region. For this purpose an attenuating body is provided which allows unattenuated passage of a radiation beam for the diagnostic region and which attenuate the other radiation by a factor of 10 to 1000. This attenuating body is preferably slidable …
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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
- Granted February 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 1997.
- 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
Timeline From CIPO dates
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.