Patents by Inventor Hassan Mostafavi

Hassan Mostafavi 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).

  • Patent number: 10510161
    Abstract: An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient, wherein the camera is configured to detect one or more markers outside and away from the patient; and a processing unit configured to receive an input image from the camera, and to process the input image to monitor a position of a target associated with the patient during the medical procedure. An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient support, wherein the camera is configured to detect one or more markers outside and away from the patient support; and a processing unit configured to receive an input image from the camera, and to process the input image to determine a position associated with the patient support during the medical procedure.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 17, 2019
    Assignee: Varian Medical Systems, Inc.
    Inventor: Hassan Mostafavi
  • Patent number: 10493298
    Abstract: A method of monitoring an object during a medical process includes: using one or more cameras to obtain information regarding an actual three dimensional configuration of an object involved in a medical process; obtaining a three-dimensional model of the object representing a geometry of the object; obtaining a movement model of the object; and processing the information, the three-dimensional model, and the movement model to monitor the object during the medical process, wherein the act of processing is performed using a processing unit.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: December 3, 2019
    Assignee: Varian Medical Systems, Inc.
    Inventors: Lisa A. Hampton, Jill Conrad, Tanya Dempsey, Jenny Kuhelj, Hassan Mostafavi
  • Publication number: 20190236804
    Abstract: An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient, wherein the camera is configured to detect one or more markers outside and away from the patient; and a processing unit configured to receive an input image from the camera, and to process the input image to monitor a position of a target associated with the patient during the medical procedure. An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient support, wherein the camera is configured to detect one or more markers outside and away from the patient support; and a processing unit configured to receive an input image from the camera, and to process the input image to determine a position associated with the patient support during the medical procedure.
    Type: Application
    Filed: April 10, 2019
    Publication date: August 1, 2019
    Inventor: Hassan Mostafavi
  • Patent number: 10092251
    Abstract: The plan CT is described to generate dual energy (DRR) that stimulates the treatment time radiographs in order to prospectively evaluate the angles in which issues for the template matching algorithm are present, and thus the visibility of the tumor. The present invention uses template matching to quantify the “trackability” of the target from different angles or directions. The peak-to-side lobe ratio is used to measure trackability. The results of this process influence treatment planning. For example, based on the outcome, either less or no dose is planned for the angles in which the location of the templates cannot be verified and thus, the tumor.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: October 9, 2018
    Assignee: Varian Medical Systems, Inc.
    Inventors: Gary Fredric Virshup, Hassan Mostafavi
  • Publication number: 20180276846
    Abstract: An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient, wherein the camera is configured to detect one or more markers outside and away from the patient; and a processing unit configured to receive an input image from the camera, and to process the input image to monitor a position of a target associated with the patient during the medical procedure. An apparatus for use in a medical procedure includes: a camera configured for attachment to a patient support, wherein the camera is configured to detect one or more markers outside and away from the patient support; and a processing unit configured to receive an input image from the camera, and to process the input image to determine a position associated with the patient support during the medical procedure.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 27, 2018
    Applicant: Varian Medical Systems, Inc.
    Inventor: Hassan MOSTAFAVI
  • Patent number: 9974494
    Abstract: A radiation system includes a radiation source having an accelerator, the radiation source having a magnetic field associated therewith that is resulted from an operation of the accelerator, and a magnetic field source configured to provide a compensating magnetic field to at least partially counteract against the magnetic field that is resulted from the operation of the accelerator. A radiation system includes a radiation device having a radiation source, a patient support, and a protective guard located between the radiation source and the patient support, wherein the protective guard is moveably coupled to the radiation device or the patient support. A radiation system includes a particle generator for generating a particle, an accelerator for accelerating the particle, and a magnetic source for changing a trajectory of the particle, wherein the magnetic source comprises a permanent magnet.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 22, 2018
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Hassan Mostafavi, Marcel R. Marc, Stanley Mansfield, Raymond D. McIntyre, Ross B. Hannibal
  • Patent number: 9939130
    Abstract: A marker system includes: a first marker; and a second marker; wherein the first marker and the second marker are configured to emit light from one or more light sources coupled to the first marker and the second marker; and wherein the first marker and the second marker are configured to emit the light for detection by a camera. A method performed using a marker system includes: generating light using one or more light sources; emitting the light at a plurality of markers that are coupled to the light sources; and detecting the light emitted from the plurality of markers using a camera; wherein the act of detecting comprises using one or more filters to reduce ambient light to a level that corresponds with a noise level of the camera while allowing light emitted from the markers to be imaged by the camera.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 10, 2018
    Assignee: Varian Medical Systems, Inc.
    Inventors: Andrew G. Jeung, Hassan Mostafavi, George A. Zdasiuk, Gary F. Virshup, Dusan Baic, Daniel R. Bilsky, Alexander R. Brown, Jon Carver, Graham Faulknor, Alyssa Garver, Arthur Kwun, Michelle Richmond, Josh M. Star-Lack, John G. Van Heteren
  • Publication number: 20180061036
    Abstract: A system for determining positional information of a camera, includes: a plane determination module configured to determine a first plane and a second plane based on a depth image; a plane-association module configured to associate the first plane determined by the plane determination module with a first tool-plane, and to associate the second plane determined by the plane determination module with a second tool-plane, the first and second tool-planes having known positional relationship with respect to each other; and a positional determination unit configured to determine the positional information of the camera based on an output from the plane-association module.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 1, 2018
    Applicant: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Hassan MOSTAFAVI, Andrew G. JEUNG, Alexander SLOUTSKY, David H. HUMBER
  • Patent number: 9886534
    Abstract: A method of detecting a possible collision in a medical procedure that involves a medical system, includes: obtaining an image of a patient that is supported on a patient support; determining a first model using a processing unit based at least in part on the image, at least a part of the first model representing a surface of the patient; determining a second model using the processing unit, the second model representing a first component of the medical system; virtually moving the first model, the second model, or both, using a collision prediction mechanism to simulate a movement of the first component of the medical system to determine whether there is a possible collision between the first component and the patient; and generating an output to indicate the possible collision or an absence of the possible collision.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: February 6, 2018
    Assignee: Varian Medical Systems, Inc.
    Inventors: Hong Wan, Raymond Kraft, Sun-Kai Lin, Stephen C. Phillips, Anthony Harrington, Hassan Mostafavi, Alexander Sloutsky, Andrew G. Jeung
  • Patent number: 9773318
    Abstract: A method of detecting camera defect includes: obtaining an image by a processing unit, the processing unit having a surface fit module, a subtraction module, and a peak quantification module; determining a first autocorrelation map for a first sub-region in the image; determining, using the surface fit module, a first surface fit for first scene content in the first sub-region; subtracting, using the subtraction module, the first surface fit from the first autocorrelation map for the first sub-region in the image to obtain a first residual map; and quantifying, using the peak quantification module, a first noise in the first residual map.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: September 26, 2017
    Assignee: Varian Medical Systems, Inc.
    Inventor: Hassan Mostafavi
  • Publication number: 20170220709
    Abstract: A method of detecting a possible collision in a medical procedure that involves a medical system, includes: obtaining an image of a patient that is supported on a patient support; determining a first model using a processing unit based at least in part on the image, at least a part of the first model representing a surface of the patient; determining a second model using the processing unit, the second model representing a first component of the medical system; virtually moving the first model, the second model, or both, using a collision prediction mechanism to simulate a movement of the first component of the medical system to determine whether there is a possible collision between the first component and the patient; and generating an output to indicate the possible collision or an absence of the possible collision.
    Type: Application
    Filed: February 3, 2016
    Publication date: August 3, 2017
    Applicant: Varian Medical Systems, Inc.
    Inventors: Hong WAN, Raymond KRAFT, Sun-Kai LIN, Stephen C. PHILLIPS, Anthony HARRINGTON, Hassan MOSTAFAVI, Alexander SLOUTSKY, Andrew G. JEUNG
  • Publication number: 20170098308
    Abstract: A method of detecting camera defect includes: obtaining an image by a processing unit, the processing unit having a surface fit module, a subtraction module, and a peak quantification module; determining a first autocorrelation map for a first sub-region in the image; determining, using the surface fit module, a first surface fit for first scene content in the first sub-region; subtracting, using the subtraction module, the first surface fit from the first autocorrelation map for the first sub-region in the image to obtain a first residual map; and quantifying, using the peak quantification module, a first noise in the first residual map.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 6, 2017
    Applicant: Varian Medical Systems, Inc.
    Inventor: Hassan MOSTAFAVI
  • Publication number: 20170014648
    Abstract: A method of monitoring a patient includes: obtaining an input image having a plurality of regions of interest by a processing unit; and determining a plurality of positions for the respective plurality of regions of interest by the processing unit; wherein the act of determining the plurality of positions comprises: accessing a plurality of templates; comparing the plurality of templates with respective areas in the input image using a comparator in the processing unit; and determining the plurality of positions based at least in part on a result of the act of comparing.
    Type: Application
    Filed: March 3, 2015
    Publication date: January 19, 2017
    Applicant: Varian Medical Systems, Inc.
    Inventor: Hassan MOSTAFAVI
  • Patent number: 9517036
    Abstract: An imaging system includes a radiation source, a positioner configured to rotate the radiation source along an arc path at a rate less than 0.5 degree/sec, an imager in operative position relative to the radiation source, wherein the radiation source and the imager are configured to obtain a plurality of images while the radiation source is at different positions along the arc path, and a processor configured to determine a digital tomosynthesis image using a subset of the plurality of images. An imaging method includes generating a control signal to control a positioner to rotate a radiation source through an arc path at a rate less than 0.5 degree/sec, obtaining a plurality of images that are generated using radiation from the radiation source while the radiation source is at different positions along the arc path, and determining a digital tomosynthesis image using a subset of the plurality of images.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: December 13, 2016
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventor: Hassan Mostafavi
  • Publication number: 20160303401
    Abstract: A radiation system includes a radiation source having an accelerator, the radiation source having a magnetic field associated therewith that is resulted from an operation of the accelerator, and a magnetic field source configured to provide a compensating magnetic field to at least partially counteract against the magnetic field that is resulted from the operation of the accelerator. A radiation system includes a radiation device having a radiation source, a patient support, and a protective guard located between the radiation source and the patient support, wherein the protective guard is moveably coupled to the radiation device or the patient support. A radiation system includes a particle generator for generating a particle, an accelerator for accelerating the particle, and a magnetic source for changing a trajectory of the particle, wherein the magnetic source comprises a permanent magnet.
    Type: Application
    Filed: June 21, 2016
    Publication date: October 20, 2016
    Inventors: Hassan MOSTAFAVI, Marcel R. MARC, Stanley MANSFIELD, Raymond D. MCINTYRE, Ross B. HANNIBAL
  • Patent number: 9392962
    Abstract: A method of processing breathing signals of a subject includes obtaining breathing signals of a subject, obtaining a signal-phase histogram using the breathing signals, wherein the signal-phase histogram comprises a plurality of data points, each of the data points having at least a phase value and a signal value, determining a reference value using at least some of the plurality of data points from the signal-phase histogram, determining whether a difference between the reference value and a signal value that is associated with a current respiratory cycle exceeds a threshold, and generating an output when the difference exceeds the threshold. A method of predicting breathing signal is also provided.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: July 19, 2016
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventor: Hassan Mostafavi
  • Patent number: 9324152
    Abstract: A method, includes: obtaining an image, the image having marker images and a background image; identifying presence of an object in the background image using a processor; and providing a signal for stopping a procedure if the presence of the object is identified. An image processing apparatus, includes: a processor configured for: obtaining an image, the image having marker images and a background image; identifying presence of an object in the background image; and providing a signal for stopping a procedure if the presence of the object is identified. A computer product having a non-transitory medium storing instructions, an execution of which causes an image processing method to be performed, the method includes: obtaining an image, the image having marker images and a background image; identifying presence of an object in the background image; and providing a signal for stopping a procedure if the presence of the object is identified.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: April 26, 2016
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Hassan Mostafavi, Andrew Jeung
  • Patent number: 9271692
    Abstract: A method of triggering an imaging process includes obtaining breathing signals, analyzing the breathing signals to identify a non-periodicity in a subject's breathing, and generating a signal to cause an imaging process to begin in response to the identified non-periodicity. A computer product having a set of instructions stored in a non-transitory medium, wherein an execution of the instructions causes a method to be performed, the method includes obtaining breathing signals, analyzing the breathing signals to identify a non-periodicity in a subject's breathing, and generating a signal to cause an imaging process to begin in response to the identified non-periodicity. A system for triggering an imaging process includes a processor that is configured for obtaining breathing signals, analyzing the breathing signals to identify a non-periodicity in a subject's breathing, and generating a signal to cause an imaging process to begin in response to the identified non-periodicity.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: March 1, 2016
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventor: Hassan Mostafavi
  • Patent number: 9268037
    Abstract: An x-ray imaging device may include a detector array and an x-ray converting layer coupled to the detector array. The detector array and the x-ray converting layer may be configured such that x-rays traverse the detector array before propagating in the x-ray converting layer. The x-ray imaging device may also include a buildup layer behind the x-ray converting layer. The x-ray imaging device may be used as a “universal” imager for both MV and kV imaging.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: February 23, 2016
    Assignee: Varian Medical Systems, Inc.
    Inventors: Larry Partain, Edward Seppi, George Zentai, Hassan Mostafavi, Ivan Mollov, Daniel Morf
  • Patent number: 9232928
    Abstract: A method and system for physiological gating is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating system components. Yet another disclosed aspect of the invention is directed to physiological gating of radiation treatment based upon the phase of the physiological activity. Gating can be performed, either prospectively or retrospectively, to any type of procedure, including radiation therapy or imaging, or other types of medical devices and procedures such as PET, MRI, SPECT, and CT scans.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: January 12, 2016
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventor: Hassan Mostafavi