Apparatus for three-dimensional viewing of magnetic resonance imaging tomograms
Patent 4983004 Issued on January 8, 1991. Estimated Expiration Date: 
July 24, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for 3-D image synthesis Patent #: 4669812 InventorsAssigneeApplicationNo. 556464 filed on 07/24/1990US Classes:359/15, Using a hologram as an optical element349/1, LIQUID CRYSTAL SYSTEM359/1, HOLOGRAPHIC SYSTEM OR ELEMENT359/28Having multiple object beam or diffuse object illuminationExaminersPrimary: Arnold, Bruce Y.Assistant: Parsons, David R. Attorney, Agent or FirmInternational ClassesG03H 001/02G01R 033/48 A61B 005/055 Foreign Application Priority Data1989-07-25 JPAbstractA plurality of liquid crystal displays, each able to independently display one of a plurality of MRI tomograms, is dispersed such that the display screen of each appear planar from a common point and are positioned such that the spacing between each display screen and the next one in front or back and of it is proportional to the spacing between the cross sections belonging to the MRI tomograms displayed by those display screens. A hologram screen is provided in position facing the display screens of the plurality of displays. By illuminating the plurality of displays with light from behind, light passing through each of the display screens will impinge on the hologram screen, and part of this light will be diffracted backwards by the hologram screen, causing virtual images of the MRI tomograms to appear in front of the hologram screen. | |
