Patents by Inventor Tiezhi Zhang
Tiezhi Zhang 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).
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Publication number: 20240006077Abstract: The disclosure relates to systems and methods for accurate generation of material maps of volume of interests, for example, that include implants, for proton radiation therapy. In one implementation, the method may include determining most probable energy (MPE) using particle energy determined from particle counting data. The method may include generating a plurality of simulations that simulate interactions using different combination of properties for the volume of interest determined from representation data and/or from a database to determine most probable energy (MPE) for each simulation. The method may include comparing the MPE determined using the particle counting data to the MPE determined from each simulation. The method may further include selecting one simulation of the plurality of simulations based on the comparing. The method may also include generating a material map for the volume of interest using the one or more properties corresponding to the one simulation.Type: ApplicationFiled: November 19, 2021Publication date: January 4, 2024Inventors: Liyong Lin, Serdar Charyyev, Chih-Wei Chang, Tiezhi Zhang, Xiaofeng Yang, Joseph Harms
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Publication number: 20230141925Abstract: A CT scanning method compensates gantry motion blurring in projection measurement based on synchronized focal spot movement and detector data shifting. Tube power is increased by moving the focal on the target and reducing focal spot dwell duration. The CT scanning method is used on helical CT and cone beam with a rotating anode source and CBCT and TBCT with a linear array x-ray source.Type: ApplicationFiled: November 8, 2022Publication date: May 11, 2023Inventors: Tiezhi Zhang, Qinghao Chen, Shuang Zhou, Yuewen Tan
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Patent number: 11289301Abstract: A multi-pixel x-ray source is provided. The x-ray source includes a plurality of transmission target assemblies. The transmission target assembly includes a tungsten target and a diamond substrate. The substrate includes a first transmission surface and a second transmission surface opposite first transmission surface. The substrate further includes a first side surface and a second side surface disposed between the first and second transmission surfaces. The target covers the first transmission surface of the substrate. The transmission target assembly further includes a base. The base surrounds the first and second side surfaces of substrate, exposing a collimator surface of the second transmission surface and the target. The transmission target assembly is configured to transmit x-ray generated by the target through the target and the substrate.Type: GrantFiled: November 6, 2020Date of Patent: March 29, 2022Assignee: Washington UniversityInventors: Tiezhi Zhang, Praneeth Kandlakunta
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Publication number: 20210151273Abstract: A multi-pixel x-ray source is provided. The x-ray source includes a plurality of transmission target assemblies. The transmission target assembly includes a tungsten target and a diamond substrate. The substrate includes a first transmission surface and a second transmission surface opposite first transmission surface. The substrate further includes a first side surface and a second side surface disposed between the first and second transmission surfaces. The target covers the first transmission surface of the substrate. The transmission target assembly further includes a base. The base surrounds the first and second side surfaces of substrate, exposing a collimator surface of the second transmission surface and the target. The transmission target assembly is configured to transmit x-ray generated by the target through the target and the substrate.Type: ApplicationFiled: November 6, 2020Publication date: May 20, 2021Applicant: Washington UniversityInventors: Tiezhi Zhang, Praneeth Kandlakunta
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Patent number: 10632326Abstract: A system or method for radiation treatment optimized for non-coplanar delivery, which includes a first collimator affixed to a gantry and a second collimator movably attached to the gantry to provide the second collimator a translation movement out of a gantry rotation plane. The system or method also includes a third collimator configured to collimate the beam in a direction of a target in the patient's body. The beam collimated by the third collimator is configured to follow the target during treatment. A method of performing rotation setup correction by rotating the treatment beam, without rotating the patient.Type: GrantFiled: December 16, 2016Date of Patent: April 28, 2020Assignee: WASHINGTON UNIVERSITYInventors: Tiezhi Zhang, Sasa Mutic
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Publication number: 20190341219Abstract: A multi-pixel x-ray source is provided. The x-ray source includes a plurality of transmission target assemblies. The transmission target assembly includes a tungsten target and a diamond substrate. The substrate includes a first transmission surface and a second transmission surface opposite first transmission surface. The substrate further includes a first side surface and a second side surface disposed between the first and second transmission surfaces. The target covers the first transmission surface of the substrate. The transmission target assembly further includes a base. The base surrounds the first and second side surfaces of substrate, exposing a collimator surface of the second transmission surface and the target. The transmission target assembly is configured to transmit x-ray generated by the target through the target and the substrate.Type: ApplicationFiled: May 7, 2019Publication date: November 7, 2019Applicant: Washington UniversityInventors: Tiezhi Zhang, Praneeth Kandlakunta
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Publication number: 20180361172Abstract: A system or method for radiation treatment optimized for non-coplanar delivery, which includes a first collimator affixed to a gantry and a second collimator movably attached to the gantry to provide the second collimator a translation movement out of a gantry rotation plane. The system or method also includes a third collimator configured to collimate the beam in a direction of a target in the patient's body. The beam collimated by the third collimator is configured to follow the target during treatment. A method of performing rotation setup correction by rotating the treatment beam, without rotating the patient.Type: ApplicationFiled: December 16, 2016Publication date: December 20, 2018Inventors: Tiezhi Zhang, Sasa Mutic
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Patent number: 9339243Abstract: A radiation treatment and imaging system for emitting a radiation treatment beam and X-ray imaging beams towards an object. The system includes an x-ray source and a collimator, first and second detectors, and a linear accelerator that delivers radiation beams to an object. The linear accelerator includes a radiation source positioned between the first and second detectors and emitting a therapy radiation beam in-line with the x-ray beams received by the first and second detectors. The system also includes a data processing device in communication with the first and second detectors. The data processing device receives imaging signals from the first and second detectors and reconstructs a three-dimensional tetrahedron beam computed tomography (TBCT) image from the received imaging signals. The system also includes a display in communication with the data processing device and for displaying the TBCT image.Type: GrantFiled: May 12, 2014Date of Patent: May 17, 2016Assignee: WILLIAM BEAUMONT HOSPITALInventors: Tiezhi Zhang, Joshua Kim
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Patent number: 8983024Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.Type: GrantFiled: July 29, 2011Date of Patent: March 17, 2015Assignee: William Beaumont HospitalInventors: Tiezhi Zhang, Xiaochao Xu, Joshua Kim, Di Yan, Alvaro Martinez
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Patent number: 8942340Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.Type: GrantFiled: July 29, 2011Date of Patent: January 27, 2015Assignee: William Beaumont HospitalInventors: Tiezhi Zhang, Xiaochao Xu, Joshua Kim, Di Yan, Alvaro Martinez
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Publication number: 20140247919Abstract: A radiation treatment and imaging system for emitting a radiation treatment beam and X-ray imaging beams towards an object. The system includes an x-ray source and a collimator, first and second detectors, and a linear accelerator that delivers radiation beams to an object. The linear accelerator includes a radiation source positioned between the first and second detectors and emitting a therapy radiation beam in-line with the x-ray beams received by the first and second detectors. The system also includes a data processing device in communication with the first and second detectors. The data processing device receives imaging signals from the first and second detectors and reconstructs a three-dimensional tetrahedron beam computed tomography (TBCT) image from the received imaging signals. The system also includes a display in communication with the data processing device and for displaying the TBCT image.Type: ApplicationFiled: May 12, 2014Publication date: September 4, 2014Applicant: William Beaumont HospitalInventors: Tiezhi Zhang, Joshua Kim
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Patent number: 8787518Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.Type: GrantFiled: July 29, 2011Date of Patent: July 22, 2014Assignee: William Beaumont HospitalInventors: Tiezhi Zhang, Xiaochao Xu, Joshua Kim, Di Yan, Alvaro Martinez
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Patent number: 8611490Abstract: A method of imaging an object that includes directing a plurality of x-ray beams in a fan-shaped form towards an object, detecting x-rays that pass through the object due to the directing a plurality of x-ray beams and generating a plurality of imaging data regarding the object from the detected x-rays. The method further includes forming either a three-dimensional cone-beam computed tomography, digital tomosynthesis or Megavoltage image from the plurality of imaging data and displaying the image.Type: GrantFiled: June 29, 2010Date of Patent: December 17, 2013Assignee: William Beaumont HospitalInventor: Tiezhi Zhang
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Publication number: 20120163531Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.Type: ApplicationFiled: July 29, 2011Publication date: June 28, 2012Inventors: Tiezhi Zhang, Xiaochao Xu, Joshua Kim, Di Yan, Alvaro Martinez
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Publication number: 20110002439Abstract: A method of imaging an object that includes directing a plurality of x-ray beams in a fan-shaped form towards an object, detecting x-rays that pass through the object due to the directing a plurality of x-ray beams and generating a plurality of imaging data regarding the object from the detected x-rays. The method further includes forming either a three-dimensional cone-beam computed tomography, digital tomosynthesis or Megavoltage image from the plurality of imaging data and displaying the image.Type: ApplicationFiled: June 29, 2010Publication date: January 6, 2011Inventor: Tiezhi Zhang
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Patent number: 7778691Abstract: Radiation treatment of the lung or surrounding tissue during continuous breathing is made possible by preparing a treatment plan linked to motion phase and then synchronizing the plan to motion phase as the patient follows a regular breathing schedule.Type: GrantFiled: November 6, 2003Date of Patent: August 17, 2010Assignee: Wisconsin Alumni Research FoundationInventors: Tiezhi Zhang, Bhudatt R. Paliwal
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Patent number: 7760849Abstract: A method of imaging an object that includes directing a plurality of x-ray beams in a fan-shaped form towards an object, detecting x-rays that pass through the object due to the directing a plurality of x-ray beams and generating a plurality of imaging data regarding the object from the detected x-rays. The method further includes forming either a three-dimensional cone-beam computed tomography, digital tomosynthesis or Megavoltage image from the plurality of imaging data and displaying the image.Type: GrantFiled: April 12, 2007Date of Patent: July 20, 2010Assignee: William Beaumont HospitalInventor: Tiezhi Zhang
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Patent number: 7367955Abstract: An improved non-invasive respiration monitor combines signals from a spirometer and laser chest displacement sensor to reduce signal error. The improved respirations signal can be used for position correction in radiation therapy and imaging applications and can be displayed to a user in breath control techniques.Type: GrantFiled: November 18, 2003Date of Patent: May 6, 2008Assignee: Wisconsin Alumni Research FoundationInventors: Tiezhi Zhang, Harald Keller, Bhudatt R. Paliwal
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Publication number: 20070280408Abstract: A method of imaging an object that includes directing a plurality of x-ray beams in a fan-shaped form towards an object, detecting x-rays that pass through the object due to the directing a plurality of x-ray beams and generating a plurality of imaging data regarding the object from the detected x-rays. The method further includes forming either a three-dimensional cone-beam computed tomography, digital tomosynthesis or Megavoltage image from the plurality of imaging data and displaying the image.Type: ApplicationFiled: April 12, 2007Publication date: December 6, 2007Inventor: Tiezhi Zhang
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Publication number: 20040254773Abstract: Radiation treatment of the lung or surrounding tissue during continuous breathing is made possible by preparing a treatment plan linked to motion phase and then synchronizing the plan to motion phase as the patient follows a regular breathing schedule.Type: ApplicationFiled: November 6, 2003Publication date: December 16, 2004Inventors: Tiezhi Zhang, Bhudatt R. Paliwal