Device for measuring the absorption of radiation in a slice of a body
CA 1079871 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Weiss, Hermann; Kowalski, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The complete plane of examination is irradiated in its entirely in third-generation computer tomography apparatus. The radiation behind the object is measured by means of a large number of detection elements The reconstruction of the absorption distribution in the plane of examination is inaccurate in a region around the centre of rotation, if the sensitivity of the detection elements differs relative to each other. The invention provides improved reconstruction accuracy also in this region in, that the detection device comprises a number of detection elements which is larger than necessary for the measurement of the fan-shaped radiation beam per se in a direction parallel to the axis of …
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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 June 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 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.