Patents by Inventor Walter Exelmans

Walter Exelmans has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Radiation image readout method and apparatus
    Patent number: 5818065
    Abstract: A radiation image read out method and apparatus wherein a photostimulable phosphor screen that has been exposed to radiation is read and erased and wherein a signal representative of the residual image still left in the screen after erasure is obtained and thresholded. In this way screens that have not been erased to an acceptable extent can be identified.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: October 6, 1998
    Assignee: Agfa-Gevaert
    Inventor: Walter Exelmans
  • Apparatus for reading an image from a stimulable phosphor sheet
    Patent number: 5548126
    Abstract: An apparatus is described for reading an image from a stimulable phosphor sheet (1) carrying a radiation image thereon. The apparatus comprises exposing means (2) for exposing the sheet (1) to scanning stimulating radiation which causes the sheet (1) to emit light in the pattern of the stored image, the stimulating radiation being deflected into the trace direction by means of galvanometric deflection. Detecting means (13) photo-electrically detect the emitted light. Erasing means (22) progressively exposes the sheet (1) to erasing radiation during the retrace steps of the galvanometric deflection to erase any residual image on the sheet (1) to enable subsequent re-use thereof by exposure of the sheet (1) to erasing radiation.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: August 20, 1996
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Walter Exelmans, Gentil Verbeke
  • Radiation image read-out system
    Patent number: 5434431
    Abstract: In a known method for radiographic imaging, a phosphor sheet capable of stimulation with radiation and carrying stored thereon an image pattern obtained e.g. by an X-ray exposure through a patient's body, is exposed to stimulating radiation, such as a laser beam, which causes the sheet to emit light in the pattern of the stored image and the emitted light is read-out photoelectrically. The stimulating radiation is applied to the sheet as a beam which is caused to scan the sheet linewise as the sheet undergoes relative movement in one direction with respect to the beam by means of galvanometric deflection which deflects the beam in one direction in a scanning step and then in the opposite direction in a retracing step to return the beam for the next scanning step.In the invention, the sheet is exposed to the beam at a significantly lower intensity level to cause the sheet to emit low level light corresponding to the image pattern.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: July 18, 1995
    Assignee: AGFA-Gevaert N. V.
    Inventors: Gentil Verbeke, Walter Exelmans