Patents by Inventor Hussein Alrifai

Hussein Alrifai 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).

  • System and method for gated radiotherapy based on physiological inputs
    Patent number: 6118847
    Abstract: A radiation therapy device (2) configured to receive a signal indicative of one or more of a patient's physiological parameters. The signal controls a gating, whereby a phase of an RF pulse (1002) and an injector pulse (1006) are varied so as to inhibit X-ray production without affecting injector or RF amplitudes.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: September 12, 2000
    Assignee: Siemens Medical Systems, Inc.
    Inventors: Francisco M. Hernandez-Guerra, Edward Lewis Calderon, Hussein Alrifai, David L. Pond, Simon John Forknall, Pat Merola
  • Precision dosimetry in an intensity modulated radiation treatment system
    Patent number: 6038284
    Abstract: A system and method for radiation therapy delivery. Known delays are compensated for by applying a compensation factor to the dose at the start of the beam cycle. According to one embodiment of the invention, a dosimetry controller is configured to sense radiation on (RAD ON) and monitor the dose rate at the beginning of the beam cycle. The dosimetry controller then multiplies the dose rate by a compensation factor. Thus, for each beam cycle, the dosimetry controller resolves the magnitude of the lost dose rate data and compensates each segment accordingly.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: March 14, 2000
    Assignee: Siemens Medical Systems, Inc.
    Inventors: Francisco M. Hernandez-Guerra, Edward Lewis Calderon, Simon John Forknall, David L. Pond, Hussein Alrifai, Randall V. Tarr