Patents by Inventor Chee-Wai Cheng

Chee-Wai Cheng 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).

  • Multi-leaf collimator for proton beam therapy
    Patent number: 8575579
    Abstract: A proton beam collimator comprising (a) titanium or (b) stainless steel containing no tungsten or (c) containing no tungsten or brass. The collimator comprises a multi-leaf collimator (MLC). The apparatus further comprises an integrated circuit (IC) mounted adjacent the collimator, the IC subject to exposure to atomic particles, illustratively, neutrons.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: November 5, 2013
    Assignee: Indiana University Research and Technololgy Corporation
    Inventors: Vadim Moskvin, Chee Wai Cheng
  • Multi-Leaf Collimator for Proton Beam Therapy
    Publication number: 20130072744
    Abstract: A proton beam collimator comprising (a) titanium or (b) stainless steel containing no tungsten or (c) containing no tungsten or brass. The collimator comprises a multi-leaf collimator (MLC). The apparatus further comprises an integrated circuit (IC) mounted adjacent the collimator, the IC subject to exposure to atomic particles, illustratively, neutrons.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 21, 2013
    Inventors: Vadim Moskvin, Chee Wai Cheng
  • METHOD FOR PRODUCING A RANGE OF THERAPEUTIC RADIATION ENERGY LEVELS
    Publication number: 20020168048
    Abstract: The present invention provides a method for producing a broad range of therapeutic radiation energy levels with a source of radiation that is operated to produce photons or particles at a first energy that are directed at a treatment site for a predetermined absorbed dose. The linear accelerator is then operated to produce photons or particles at a second energy directed at the treatment site for another predetermined absorbed dose. The appropriate selection of the first and second absorbed doses yields an absorbed dose at the treatment site equivalent to the dose produced by photons having an energy that is intermediate of the first and second energies. Thus, a dual energy linear accelerator may be operated according to the method to yield a continuous range of energies.
    Type: Application
    Filed: March 13, 2001
    Publication date: November 14, 2002
    Inventors: James R. Wong, Chee-Wai Cheng
  • Method for producing a range of therapeutic radiation energy levels
    Patent number: 6459762
    Abstract: The present invention provides a method for producing a broad range of therapeutic radiation energy levels with a source of radiation that is operated to produce photons or particles at a first energy that are directed at a treatment site for a predetermined absorbed dose. The linear accelerator is then operated to produce photons or particles at a second energy directed at the treatment site for another predetermined absorbed dose. The appropriate selection of the first and second absorbed doses yields an absorbed dose at the treatment site equivalent to the dose produced by photons having an energy that is intermediate of the first and second energies. Thus, a dual energy linear accelerator may be operated according to the method to yield a continuous range of energies.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: October 1, 2002
    Assignee: Ro Inventions I, LLC
    Inventors: James R. Wong, Chee-Wai Cheng