Patents Assigned to Varian Assocaites, Inc.
  • Patent number: 5949848
    Abstract: An x-ray imaging apparatus receives an image-carrying x-ray beam on a flat amorphous silicon imaging panel with a light detector unit disposed behind. The imaging panel is of a multi-layered structure having sequentially a light-blocking layer which is opaque to visible light but transmissive to x-rays, a converting layer of a phosphorescent material for converting x-rays incident thereon into visible light, and a two-dimensional array of photosensitive elements of an amorphous semiconductor material such as amorphous silicon, adapted to undergo a detectable change in electrical characteristic in response to impingement of light. The light detector unit may be a simple light detector for receiving the light emitted from the converting layer and passed through regions between neighboring pairs of the array of photosensitive elements.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 7, 1999
    Assignee: Varian Assocaites, Inc.
    Inventor: David L. Gilblom