Patents by Inventor Mahta Moghaddam
Mahta Moghaddam 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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Patent number: 11839449Abstract: Methods and systems of monitoring and controlling thermal therapy treatments. One method includes determining, with an electronic processor, a propagation constant for a plurality of waveports. The method also includes modeling an object within an imaging cavity using a sparse mesh model. The method also includes determining a simulated impedance of the object based on the model of the object. The method also includes calibrating the simulated impedance with a theoretical impedance numerically calculated for the object. The method also includes determining a distribution of an electric field and a distribution of a magnetic field for a mode in a conformal modeled waveport based on the calibrated impedance and the model of the object. The method also includes exciting the plurality of waveports to generate the determined distribution of the electric field and the distribution of the magnetic field.Type: GrantFiled: July 15, 2022Date of Patent: December 12, 2023Assignee: University of Southern CaliforniaInventors: John P. Stang, Mark S. Haynes, Mahta Moghaddam, Guanbo Chen
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Patent number: 11711254Abstract: This disclosure presents distributed and decentralized synchronization for wireless transceivers. The disclosed system, device, and method achieve sub-nanosecond synchronization using low-cost commercial off the shelf software defined radios. By providing a decentralized mechanism that does not rely on a hierarchical master-slave structure, networks constructed as disclosed are robust to sensor drop-out in contested or harsh environments. Such networks may be used to create phased array radars and communication systems without requiring wired connections to distribute a common clock or local oscillator reference.Type: GrantFiled: January 14, 2022Date of Patent: July 25, 2023Assignee: University of Southern CaliforniaInventors: Mahta Moghaddam, Samuel M. Prager, Mark S. Haynes
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Patent number: 11540724Abstract: A method for determining a change of temperature of an object. The method may include heating an object and measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object. A distorted Born iterative method may be used to determine a change of a dielectric property of the object based on the measured S-parameters. A change of temperature of the object may be determined based on the change of the dielectric property of the object.Type: GrantFiled: January 4, 2018Date of Patent: January 3, 2023Assignee: UNIVERSITY OF SOUTHERN CALIFORNIAInventors: Guanbo Chen, Mahta Moghaddam, John Stang, Mark Haynes
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Publication number: 20220409062Abstract: Methods and systems of monitoring and controlling thermal therapy treatments. One method includes determining, with an electronic processor, a propagation constant for a plurality of waveports. The method also includes modeling an object within an imaging cavity using a sparse mesh model. The method also includes determining a simulated impedance of the object based on the model of the object. The method also includes calibrating the simulated impedance with a theoretical impedance numerically calculated for the object. The method also includes determining a distribution of an electric field and a distribution of a magnetic field for a mode in a conformal modeled waveport based on the calibrated impedance and the model of the object. The method also includes exciting the plurality of waveports to generate the determined distribution of the electric field and the distribution of the magnetic field.Type: ApplicationFiled: July 15, 2022Publication date: December 29, 2022Inventors: John P. Stang, Mark S. Haynes, Mahta Moghaddam, Guanbo Chen
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Patent number: 11426080Abstract: Methods and systems of monitoring and controlling thermal therapy treatments. One method includes determining, with an electronic processor, a propagation constant for a plurality of waveports. The method also includes modeling an object within an imaging cavity using a sparse mesh model. The method also includes determining a simulated impedance of the object based on the model of the object. The method also includes calibrating the simulated impedance with a theoretical impedance numerically calculated for the object. The method also includes determining a distribution of an electric field and a distribution of a magnetic field for a mode in a conformal modeled waveport based on the calibrated impedance and the model of the object. The method also includes exciting the plurality of waveports to generate the determined distribution of the electric field and the distribution of the magnetic field.Type: GrantFiled: July 24, 2017Date of Patent: August 30, 2022Assignee: University of Southern CaliforniaInventors: John P. Stang, Mark S. Haynes, Mahta Moghaddam, Guanbo Chen
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Publication number: 20220239541Abstract: This disclosure presents distributed and decentralized synchronization for wireless transceivers. The disclosed system, device, and method achieve sub-nanosecond synchronization using low-cost commercial off the shelf software defined radios. By providing a decentralized mechanism that does not rely on a hierarchical master-slave structure, networks constructed as disclosed are robust to sensor drop-out in contested or harsh environments. Such networks may be used to create phased array radars and communication systems without requiring wired connections to distribute a common clock or local oscillator reference.Type: ApplicationFiled: January 14, 2022Publication date: July 28, 2022Inventors: Mahta Moghaddam, Samuel M. Prager, Mark S. Haynes
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Publication number: 20220120851Abstract: Systems and methods for software defined radar are disclosed. Exemplary systems utilize a frequency stacking bandwidth reconstruction technique for a stepped frequency signal to create a synthetic wideband waveform. The methods enable low-cost, reconfigurable applications such as ground penetrating radar or small unmanned aerial vehicle synthetic aperture radar platforms.Type: ApplicationFiled: March 26, 2020Publication date: April 21, 2022Inventors: Samuel Prager, Mahta Moghaddam, John Stang
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Patent number: 11250601Abstract: A Convolutional Neural Network (CNN) assisted dielectric imaging method is provided. The method used CNN to incorporate the abundant image information from Magnetic Resonance (MR) images into the inverse scattering model-based microwave imaging process and generate high-fidelity dielectric images. A CNN is designed and trained to learn the complex mapping function from MR T1 images to dielectric images. Once trained, the new patients' MR T1 images are fed into the CNN to generate predicted dielectric images, which are used as the starting image for the microwave inverse scattering imaging. The CNN-predicted dielectric image significantly reduces the non-linearity and ill-posedness of the inverse scattering problem. The application of the proposed method to recover human brain dielectric images at 4 mm and 2 mm resolution with single-frequency and multi-frequency microwave measurements is provided.Type: GrantFiled: April 3, 2020Date of Patent: February 15, 2022Assignee: University of Southern CaliforniaInventors: Guanbo Chen, Mahta Moghaddam, Pratik Shah, John Stang
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Publication number: 20200397345Abstract: A human activity recognition system includes a receiver coil mounted on a subject and a plurality of transmitter coils mounted on the subject at different locations than the receiver coil and each other. Each transmitter coil is inductively coupled to the receiver coil. A data processing system is in electrical communication with the receiver coil. Characteristically, the data processing system receives signals from each transmitter coils wherein the data processing system applies a machine learning classifier to determine an activity that the subject is engaged in.Type: ApplicationFiled: June 18, 2020Publication date: December 24, 2020Inventors: Negar GOLESTANI, Mahta MOGHADDAM
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Publication number: 20200320752Abstract: A Convolutional Neural Network (CNN) assisted dielectric imaging method is provided. The method used CNN to incorporate the abundant image information from Magnetic Resonance (MR) images into the inverse scattering model-based microwave imaging process and generate high-fidelity dielectric images. A CNN is designed and trained to learn the complex mapping function from MR T1 images to dielectric images. Once trained, the new patients' MR T1 images are fed into the CNN to generate predicted dielectric images, which are used as the starting image for the microwave inverse scattering imaging. The CNN-predicted dielectric image significantly reduces the non-linearity and ill-posedness of the inverse scattering problem. The application of the proposed method to recover human brain dielectric images at 4 mm and 2 mm resolution with single-frequency and multi-frequency microwave measurements is provided.Type: ApplicationFiled: April 3, 2020Publication date: October 8, 2020Inventors: GUANBO CHEN, MAHTA MOGHADDAM, PRATIK SHAH, JOHN STANG
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Patent number: 10786569Abstract: A group of Hyperthermia micro/nano particles are prepared. Each nanoparticle has a first diameter between 1 micron to 50 micron and a first thickness between 100 nm to 5 micron, in a disk-like shape. The hyperthermia micro/nano particles in the present show enhanced heat properties under microwave radiation which can be used for diagnosis and therapeutic purpose in cancer treatment.Type: GrantFiled: July 31, 2016Date of Patent: September 29, 2020Inventors: Wei Wu, Yifei Wang, Mahta Moghaddam, John Stang
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Publication number: 20200196905Abstract: Systems and methods for tracking a probe during a procedure. In one embodiment, the method includes monitoring a position of the probe in an imaging region during the procedure using microwave inverse scattering and contrast source inversion. The method also includes solving for a contrast source in the imaging region using compressive sensing and group sparsity. The contrast source exists at a surface of the probe or within the probe. The method further includes imaging the contrast source and the probe by solving a linear inverse scattering problem with a group sparsity constraint. The method also includes determining a location of the probe in the imaging region during the procedure based on the imaging of the contrast source and the probe. The method further includes displaying an image of the location of the probe relative to an anatomy feature in the imaging region during the procedure.Type: ApplicationFiled: August 21, 2018Publication date: June 25, 2020Inventors: Guanbo Chen, Mahta Moghaddam, Pratik Shah, John Stang
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Publication number: 20200093374Abstract: A method for determining a change of temperature of an object. The method may include heating an object and measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object. A distorted Born iterative method may be used to determine a change of a dielectric property of the object based on the measured S-parameters. A change of temperature of the object may be determined based on the change of the dielectric property of the object.Type: ApplicationFiled: January 4, 2018Publication date: March 26, 2020Inventors: Guanbo Chen, Mahta Moghaddam, John Stang, Mark Haynes
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Publication number: 20180020926Abstract: Methods and systems of monitoring and controlling thermal therapy treatments. One method includes determining, with an electronic processor, a propagation constant for a plurality of waveports. The method also includes modeling an object within an imaging cavity using a sparse mesh model. The method also includes determining a simulated impedance of the object based on the model of the object. The method also includes calibrating the simulated impedance with a theoretical impedance numerically calculated for the object. The method also includes determining a distribution of an electric field and a distribution of a magnetic field for a mode in a conformal modeled waveport based on the calibrated impedance and the model of the object. The method also includes exciting the plurality of waveports to generate the determined distribution of the electric field and the distribution of the magnetic field.Type: ApplicationFiled: July 24, 2017Publication date: January 25, 2018Inventors: John P. Stang, Mark S. Haynes, Mahta Moghaddam
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Publication number: 20170209578Abstract: A group of Hyperthermia micro/nano particles are prepared. Each nanoparticle has a first diameter between 1 micron to 50 micron and a first thickness between 100 nm to 5 micron, in a disk-like shape. The hyperthermia micro/nano particles in the present show enhanced heat properties under microwave radiation which can be used for diagnosis and therapeutic purpose in cancer treatment.Type: ApplicationFiled: July 31, 2016Publication date: July 27, 2017Inventors: Wei WU, Yifei WANG, Mahta Moghaddam, John Stang
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Patent number: 9329263Abstract: An imaging system and method in which the system carries out the method which includes the steps of: (a) determining an incident field, (b) using the incident field and a volume integral equation (VIE) to determine a total field, (c) predicting voltage ratio measurement at a receiving antenna by using the volume integral equation (VIE), wherein the VIE includes a vector Green's function, (d) collecting voltage ratio measurements from one or more receiving antennas, and (e) comparing the predicted voltage ratio measurements to the collected voltage ratio measurements to determine one or more properties of the object being evaluated. An S-parameter based inverse scattering method using the vector Green's function and VIE as its core is also described.Type: GrantFiled: May 23, 2012Date of Patent: May 3, 2016Assignee: The Regents of the University of MichiganInventors: Mark Spencer Haynes, Mahta Moghaddam
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Publication number: 20130135136Abstract: An imaging system and method in which the system carries out the method which includes the steps of: (a) determining an incident field, (b) using the incident field and a volume integral equation (VIE) to determine a total field, (c) predicting voltage ratio measurement at a receiving antenna by using the volume integral equation (VIE), wherein the VIE includes a vector Green's function, (d) collecting voltage ratio measurements from one or more receiving antennas, and (e) comparing the predicted voltage ratio measurements to the collected voltage ratio measurements to determine one or more properties of the object being evaluated. An S-parameter based inverse scattering method using the vector Green's function and VIE as its core is also described.Type: ApplicationFiled: May 23, 2012Publication date: May 30, 2013Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Mark Spencer Haynes, Mahta Moghaddam