Patents by Inventor Ali Bani-Hashemi

Ali Bani-Hashemi 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).

  • Publication number: 20090003512
    Abstract: A system includes acquisition of a three-dimensional cone beam image, and determination of a dose to be delivered based on the three-dimensional image and on parameters of a treatment beam to deliver the dose. Some systems may include modification of a three-dimensional cone beam image to correct for scatter radiation, and determination of a dose based on the modified three-dimensional cone beam image.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 1, 2009
    Inventors: Jean Pouliot, Josephine Chen, Hong Chen, Juan Carlos Celi, Ali Bani-Hashemi, Bijumon Gangadharan
  • Patent number: 7418078
    Abstract: A radiographic imaging device includes an X-ray source having a finite focal spot characterized by a determined intensity distribution. The X-ray source emits a beam of X-ray radiation toward an object. A detector assembly receives at least part of the X-ray radiation after it passes through the object. The detector assembly produces a signal in response to the received radiation. An image processor constructs an image from the signal generated by the detector assembly using the determined intensity distribution of the X-ray source. By inverse filtering the aggregated detector image from the detector assembly, the effects of the finite focal spot size of the X-ray source are mitigated, improving the quality of the resulting image.
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: August 26, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Wolf-Ekkehard Blanz, Ali Bani-Hashemi
  • Patent number: 7397044
    Abstract: Some embodiments include reception of a first instruction to enter an imaging mode, and, in response to the first instruction, automatic performance of at least one of: reduction of a focal spot size of a radiation beam, movement of a flattening filter out of a path of the radiation beam, replacement of a first target for photon emission with a second target for photon emission, or movement of a scatter-reducing filter into the path of the radiation beam. Embodiments may further include reception of a second instruction to enter a first radiation treatment mode, and, in response to the second instruction, automatic performance at least one of: increase of a focal spot size of the radiation beam, movement of the flattening filter into the path of the radiation beam, replacement of the second target with the first target, or movement of the scatter-reducing filter out of the path of the radiation beam.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: July 8, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Edward Lewis Calderon, Francisco M. Hernadez-Guerra, Ali Bani-Hashemi, Farhad A. Ghelmansarai
  • Patent number: 7379077
    Abstract: There is provided a method for augmented reality guided instrument positioning. A viewpoint is established, from which a line of sight to a point on a target defines a path for an instrument to follow during a positioning of the instrument to the point on the target. The instrument is aligned along the line of sight to the point on the target.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 27, 2008
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Ali Bani-Hashemi, Nassir Navab, Frank Sauer
  • Patent number: 7355682
    Abstract: A system for measuring the distance from a first point spaced away from a surface of an object to a second point on a surface of the object along an axis extending through the first and second points includes one or more light projection assemblies for projecting light stripes onto the surface of the object so that the light stripes pass though the second point. An imaging device detects the position of the second point by sensing the light stripes at the second point. A distance calculator may then calculate the distance between the first point and the second point using the position of the second point detected by the imaging device. The system is calibrated using the cross-ratio of points detected along the axis by the imaging device.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: April 8, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ali Bani-Hashemi
  • Patent number: 7249854
    Abstract: A projection system for projecting a shape onto a scene (e.g., the surface of an object, the body of a patient, or the like) so that the shape appears to be projected via a light beam emanating from a desired source location includes two or more projection assemblies for projecting planes of light which intersect the scene to form light stripes on the scene. The intersection of the light stripes defines a point of light projected onto the scene so that the point of light appears to emanate from the source location. The first and second projection assemblies rotate about first and second axes which extend through the source location for controlling the position of the point of light on the scene.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: July 31, 2007
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ali Bani-Hashemi
  • Patent number: 7245698
    Abstract: A 4-dimensional digital tomosynthesis system includes an x-ray source, an x-ray detector and a processor. The x-ray source is suitable for emitting x-ray beams to an object with a periodic motion. The periodic motion is divided into (n+1) time intervals, n being a positive integer. Each of the (n+1) time intervals is associated with a time instance ti, i=0, 1, 2, . . . , n. The x-ray detector is coupled to the x-ray source for acquiring projection radiographs of the object at each time instance ti for each scan angle based on the x-ray beams. The processor is communicatively coupled to the x-ray source and the x-ray detector for controlling the x-ray source and processing data received from the x-ray detector such that all projection radiographs acquired from all scan angles for each time instance ti are reconstructed and (n+1) sets of cross sections of the object are obtained. The cross section is either a coronal cross section or a sagittal cross section.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: July 17, 2007
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Geordi G. Pang, Ali Bani-Hashemi, John Alan Rowlands
  • Patent number: 7242742
    Abstract: Some embodiments include a particle source, an RF power source, an accelerator waveguide, and an imaging device. The particle source is to generate a first injector current and a second injector current, the first injector current being less than the second injector current. The RF power source is to generate first RF power at a first pulse rate and second RF power at a second pulse rate, the first pulse rate being greater than the second pulse rate. The accelerator waveguide is to accelerate a first electron beam based on the first injector current and the first RF power and to accelerate a second electron beam based on the second injector current and the second RF power, and the imaging device is to acquire an image based on the first electron beam. The second electron beam may be used to deliver treatment radiation to a patient.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: July 10, 2007
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Edward Lewis Calderon, Francisco M. Hernandez-Guerra, Ali Bani-Hashemi, Farhad A. Ghelmansarai
  • Patent number: 7239330
    Abstract: There is provided a method for augmented reality guided instrument positioning. A graphics guide is determined for positioning an instrument that provides a substantially unobstructed view of the instrument during the positioning. The graphics guide is rendered in alignment with a predetermined path to be traversed during the positioning of the instrument.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: July 3, 2007
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Frank Sauer, Ali Bani-Hashemi
  • Patent number: 7176936
    Abstract: There is provided a method for augmented reality guided instrument positioning. A graphics guide is determined for positioning an instrument. The graphics guide is rendered such that an appearance of at least one portion of the graphics guide is modulated with respect to at least one of space and time.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: February 13, 2007
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Frank Sauer, Ali Bani-Hashemi
  • Publication number: 20070025509
    Abstract: A 4-dimensional digital tomosynthesis system includes an x-ray source, an x-ray detector and a processor. The x-ray source is suitable for emitting x-ray beams to an object with a periodic motion. The periodic motion is divided into (n+1) time intervals, n being a positive integer. Each of the (n+1) time intervals is associated with a time instance ti, i=0, 1, 2, . . . , n. The x-ray detector is coupled to the x-ray source for acquiring projection radiographs of the object at each time instance ti for each scan angle based on the x-ray beams. The processor is communicatively coupled to the x-ray source and the x-ray detector for controlling the x-ray source and processing data received from the x-ray detector such that all projection radiographs acquired from all scan angles for each time instance ti are reconstructed and (n+1) sets of cross sections of the object are obtained. The cross section is either a coronal cross section or a sagittal cross section.
    Type: Application
    Filed: July 13, 2005
    Publication date: February 1, 2007
    Inventors: Geordi Pang, Ali Bani-Hashemi, John Rowlands
  • Publication number: 20070018111
    Abstract: Some embodiments include a particle source, an RF power source, an accelerator waveguide, and an imaging device. The particle source is to generate a first injector current and a second injector current, the first injector current being less than the second injector current. The RF power source is to generate first RF power at a first pulse rate and second RF power at a second pulse rate, the first pulse rate being greater than the second pulse rate. The accelerator waveguide is to accelerate a first electron beam based on the first injector current and the first RF power and to accelerate a second electron beam based on the second injector current and the second RF power, and the imaging device is to acquire an image based on the first electron beam. The second electron beam may be used to deliver treatment radiation to a patient.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 25, 2007
    Inventors: Edward Calderon, Francisco Hernandez-Guerra, Ali Bani-Hashemi, Farhad Ghelmansarai
  • Publication number: 20070018117
    Abstract: Some embodiments include reception of a first instruction to enter an imaging mode, and, in response to the first instruction, automatic performance of at least one of: reduction of a focal spot size of a radiation beam, movement of a flattening filter out of a path of the radiation beam, replacement of a first target for photon emission with a second target for photon emission, or movement of a scatter-reducing filter into the path of the radiation beam. Embodiments may further include reception of a second instruction to enter a first radiation treatment mode, and, in response to the second instruction, automatic performance at least one of: increase of a focal spot size of the radiation beam, movement of the flattening filter into the path of the radiation beam, replacement of the second target with the first target, or movement of the scatter-reducing filter out of the path of the radiation beam.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 25, 2007
    Inventors: Edward Calderon, Francisco Hernadez-Guerra, Ali Bani-Hashemi, Farhad Ghelmansarai
  • Publication number: 20060251212
    Abstract: A radiographic imaging device includes an X-ray source having a finite focal spot characterized by a determined intensity distribution. The X-ray source emits a beam of X-ray radiation toward an object. A detector assembly receives at least part of the X-ray radiation after it passes through the object. The detector assembly produces a signal in response to the received radiation. An image processor constructs an image from the signal generated by the detector assembly using the determined intensity distribution of the X-ray source. By inverse filtering the aggregated detector image from the detector assembly, the effects of the finite focal spot size of the X-ray source are mitigated, improving the quality of the resulting image.
    Type: Application
    Filed: May 6, 2005
    Publication date: November 9, 2006
    Inventors: Wolf-Ekkehard Blanz, Ali Bani-Hashemi
  • Publication number: 20060250586
    Abstract: A projection system for projecting a shape onto a scene (e.g., the surface of an object, the body of a patient, or the like) so that the shape appears to be projected via a light beam emanating from a desired source location includes two or more projection assemblies for projecting planes of light which intersect the scene to form light stripes on the scene. The intersection of the light stripes defines a point of light projected onto the scene so that the point of light appears to emanate from the source location. The first and second projection assemblies rotate about first and second axes which extend through the source location for controlling the position of the point of light on the scene.
    Type: Application
    Filed: May 4, 2005
    Publication date: November 9, 2006
    Inventor: Ali Bani-Hashemi
  • Publication number: 20060152704
    Abstract: A system for measuring the distance from a first point spaced away from a surface of an object to a second point on a surface of the object along an axis extending through the first and second points includes one or more light projection assemblies for projecting light stripes onto the surface of the object so that the light stripes pass though the second point. An imaging device detects the position of the second point by sensing the light stripes at the second point. A distance calculator may then calculate the distance between the first point and the second point using the position of the second point detected by the imaging device. The system is calibrated using the cross-ratio of points detected along the axis by the imaging device.
    Type: Application
    Filed: January 7, 2005
    Publication date: July 13, 2006
    Inventor: Ali Bani-Hashemi
  • Publication number: 20060151708
    Abstract: X-ray portal imaging detectors have multiple layers, such as multiple layers of phosphor screens and/or detectors. Some x-rays that pass through one layer are detected or converted into light energies in a different layer. For example, one phosphor screen is provided in front and another behind that panel detector circuitry. Light generated in each of the phosphor screens is detected by the same detector circuitry. As another example, multiple layers of phosphor screens and associated detector circuits are provided. Some x-rays passing through one layer may be detected in a different layer. High energy x-rays associated with Megavoltage sources as well as lower or higher energy x-rays may be detected.
    Type: Application
    Filed: January 11, 2005
    Publication date: July 13, 2006
    Inventors: Ali Bani-Hashemi, Farhad Ghelmansarai
  • Patent number: 7046757
    Abstract: A method for separating and filtering noise caused by X-ray scatter contaminations from the primary signal component of the signal produced by the detector assembly of a radiographic imaging device employs a scatter removal screen or grating disposed between the object being imaged and the detector assembly. The grating has an absorption that varies periodically for varying the intensity of the X-ray radiation passed through the grating. This variation in intensity of the X-ray radiation causes the signal produced by the detector assembly to be amplitude modulated so that the frequency of the primary signal component is shifted from noise components of the signal caused by X-ray scatter contamination allowing the noise components to be filtered from the primary signal component so that scatter induced noise may be reduced or eliminated from the signal.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: May 16, 2006
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Ali Bani-Hashemi, Wolf-Ekkehard Blanz, Jonathan S. Maltz
  • Patent number: 7016522
    Abstract: A method and system for positioning a patient for receiving radiotherapy treatment by performing a computer tomography scan of the patient in a first position to acquire CT data, using the CT data to create one or more images of the patient in the first position, preparing the patient to receive treatment delivery in a second position, acquiring one or more images of the patient in the second position, using a means for comparing the one or more images of the patient in the first position to the one or more images of the patient in the second position, and repositioning the patient until the patient is in substantially the same position as shown in the one or more images of the patient in the first position.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: March 21, 2006
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Ali Bani-Hashemi
  • Publication number: 20050093889
    Abstract: There is provided a method for augmented reality guided instrument positioning. A graphics guide is determined for positioning an instrument that provides a substantially unobstructed view of the instrument during the positioning. The graphics guide is rendered in alignment with a predetermined path to be traversed during the positioning of the instrument.
    Type: Application
    Filed: October 13, 2004
    Publication date: May 5, 2005
    Inventors: Frank Sauer, Ali Bani-Hashemi