Patents by Inventor Priti Balchandani
Priti Balchandani 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: 20230160983Abstract: A radiofrequency (RF) resonator array device for use in magnetic resonance imaging (MRT), The RF resonator array device includes a substrate. An army of coupled split ring resonators are located on the substrate. Each of the coupled split ring resonators includes a first split ring resonator positioned on a first side of the substrate and a second split ring resonator positioned on a second side of the substrate located opposite the first side. The second split ring resonator is inductively coupled to the first split ring resonator. Methods of making and using the RF resonator device are also disclosed.Type: ApplicationFiled: May 5, 2021Publication date: May 25, 2023Inventors: Akbar ALIPOUR, Priti BALCHANDANI, Alan C. SEIFERT
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Patent number: 10429473Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a slice-selective adiabatic magnetization T2 preparation pulse for magnetic resonance imaging. A pulse control signal including an adiabatic half passage pulse control signal, an adiabatic full passage pulse control signal, and a reverse adiabatic half passage pulse control signal is generated. A plurality of slice-selective linear phase subpulse control signals are generated. The pulse control signal is sampled using the plurality of slice-selective linear phase subpulse control signals to generate a slice-selective adiabatic magnetization T2 preparation control signal. The slice-selective adiabatic magnetization T2 preparation control signal is output to a waveform generator to produce the slice-selective adiabatic magnetization T2 preparation pulse.Type: GrantFiled: March 11, 2016Date of Patent: October 1, 2019Assignee: Icahn School of Medicine at Mount SinaiInventors: Hadrien Dyvorne, Priti Balchandani
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Patent number: 10267880Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a pulse pair for magnetic resonance imaging. A pulse pair control signal comprising an adiabatic pulse and a matched phase non-adiabatic pulse is generated. The pulse pair control signal is transformed into a power independent of number of slices pulse pair. The Power Independent of Number of Slices pulse pair control signal is output to a waveform generator to produce the Power Independent of Number of Slices pulse pair in a spin echo sequence.Type: GrantFiled: April 27, 2015Date of Patent: April 23, 2019Assignee: Icahn School of Medicine at Mount SinaiInventors: Rebecca Emily Feldman, Haisam Mohammad Islam, Priti Balchandani
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Patent number: 10247797Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a semi-adiabatic spectral-spatial spectroscopic imaging sequence for magnetic resonance imaging. A pulse control signal comprising a pair of adiabatic pulses and a linear phase pulse is generated. The pulse control signal is transformed into a pair of spectral-spatial refocusing pulses and an excitation pulse. The pair of spectral-spatial refocusing pulses and the excitation pulse are output to a waveform generator to produce the semi-adiabatic spectral-spatial spectroscopic imaging sequence.Type: GrantFiled: December 4, 2015Date of Patent: April 2, 2019Assignee: ICAHN SCHOOL OF MEDICINE AT MOUNT SINAIInventors: Rebecca Emily Feldman, Priti Balchandani
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Publication number: 20170261585Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a slice-selective adiabatic magnetization T2 preparation pulse for magnetic resonance imaging. A pulse control signal including an adiabatic half passage pulse control signal, an adiabatic full passage pulse control signal, and a reverse adiabatic half passage pulse control signal is generated. A plurality of slice-selective linear phase subpulse control signals are generated. The pulse control signal is sampled using the plurality of slice-selective linear phase subpulse control signals to generate a slice-selective adiabatic magnetization T2 preparation control signal. The slice-selective adiabatic magnetization T2 preparation control signal is output to a waveform generator to produce the slice-selective adiabatic magnetization T2 preparation pulse.Type: ApplicationFiled: March 11, 2016Publication date: September 14, 2017Inventors: Hadrien Dyvorne, Priti Balchandani
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Publication number: 20170160361Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a semi-adiabatic spectral-spatial spectroscopic imaging sequence for magnetic resonance imaging. A pulse control signal comprising a pair of adiabatic pulses and a linear phase pulse is generated. The pulse control signal is transformed into a pair of spectral-spatial refocusing pulses and an excitation pulse. The pair of spectral-spatial refocusing pulses and the excitation pulse are output to a waveform generator to produce the semi-adiabatic spectral-spatial spectroscopic imaging sequence.Type: ApplicationFiled: December 4, 2015Publication date: June 8, 2017Inventors: Rebecca Emily Feldman, Priti Balchandani
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Publication number: 20160116561Abstract: A method, magnetic resonance imaging computing device, and a non-transitory computer readable medium for producing a pulse pair for magnetic resonance imaging. A pulse pair control signal comprising an adiabatic pulse and a matched phase non-adiabatic pulse is generated. The pulse pair control signal is transformed into a power independent of number of slices pulse pair. The Power Independent of Number of Slices pulse pair control signal is output to a waveform generator to produce the Power Independent of Number of Slices pulse pair in a spin echo sequence.Type: ApplicationFiled: April 27, 2015Publication date: April 28, 2016Inventors: Rebecca Emily FELDMAN, Haisam Mohammad ISLAM, Priti BALCHANDANI
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Patent number: 8473536Abstract: A method for providing an adiabatic RF pulse that is an inversion or refocusing pulse for a RF pulse sequence is provided. A linear phase frequency profile (Flp(?)) is determined for the adiabatic RF pulse. A quadratic phase is applied to the linear phase frequency profile for the adiabatic RF pulse to obtain F(?), wherein the applying the quadratic phase comprises setting F(?)=Flp(?)eik?2. A polynomial ? is set to equal a Fourier Transform (F(?)). A corresponding minimum phase ? polynomial is determined for the ? polynomial. (?,?) are set as inputs to an inverse Shinnar Le-Roux transform to generate an adiabatic RF waveform. The adiabatic RF waveform is truncated to produce the adiabatic RF pulse, wherein k>0.03?/(?5??p)/(N+1) and k<kmax, where kmax is a value at which the adiabatic RF pulse is truncated at 25% of a maximum RF amplitude.Type: GrantFiled: June 22, 2009Date of Patent: June 25, 2013Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, John M. Pauly, Daniel M. Spielman
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Patent number: 7966053Abstract: A method for performing spectroscopy using an interleaved readout for at least two species. A B0 field is applied. A first spatial-spectral (SPSP) position resolved spectroscopy sequence (PRESS) excitation with a sufficiently narrow band to excite a first species without exciting a second species is applied. A first readout that measures the first species is performed. A second SPSP PRESS excitation with a sufficiently narrow band to excite the second species without exciting the first species is applied. A second readout that measures the second species is performed.Type: GrantFiled: November 26, 2007Date of Patent: June 21, 2011Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John Pauly
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Publication number: 20100325185Abstract: A method for providing an adiabatic RF pulse that is an inversion or refocusing pulse for a RF pulse sequence is provided. A linear phase frequency profile (Flp(?)) is determined for the adiabatic RF pulse. A quadratic phase is applied to the linear phase frequency profile for the adiabatic RF pulse to obtain F(?), wherein the applying the quadratic phase comprises setting F(?)=Flp(?)eik?2. A polynomial ? us set ti equal a Fourier Transform (F(?)). A corresponding minimum phase ? polynomial is determined for the ? polynomial. (?,?) are set as inputs to an inverse Shinnar Le-Roux transform to generate an adiabatic RF waveform. The adiabatic RF waveform is truncated to produce the adiabatic RF pulse, wherein k>0.03?/(?5??p)/(N+1) and k<kmax, where kmax is a value at which the adiabatic RF pulse is truncated at 25% of a maximum RF amplitude.Type: ApplicationFiled: June 22, 2009Publication date: December 23, 2010Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti BALCHANDANI, John M. PAULY, Daniel M. SPIELMAN
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Patent number: 7821263Abstract: A method for frequency selective and slice selective magnetic resonance imaging (MRI) is provided. A B0 field is applied. A self-refocused spatial-spectral (SPSP) RF pulse is applied. A readout of a portion of k-space for the excited slice is performed. A second self-refocused SPSP excitation RF pulse is applied, wherein the second self-refocused SPSP excitation has an 180° echo phase difference from the self-refocused SPSP excitation. A second readout of a portion of k-space for the excited slice was performed. A difference between the readout and the second readout was found. The previous steps were repeated until k-space has been filled for the excited slice. The previous steps were repeated for a plurality of slices.Type: GrantFiled: June 10, 2008Date of Patent: October 26, 2010Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John M. Pauly
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Patent number: 7683618Abstract: A manifestation of the invention provides a method for slice selective excitation for magnetic resonance imaging (MRI). A B0 field is applied. A STABLE pulse comprising of a BIR-4 envelope sampled by a plurality of subpulses with a duration is applied, where amplitude and frequency modulation functions of the BIR-4 envelope are slowly varying with respect to the duration of the subpulses. A portion of k-space is read out to obtain k-space data. The STABLE pulse and readout are repeated until sufficient k-space has been acquired. A Fourier Transform of the k-space data is taken.Type: GrantFiled: March 13, 2008Date of Patent: March 23, 2010Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John Pauly
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Publication number: 20090315558Abstract: A method for frequency selective and slice selective magnetic resonance imaging (MRI) is provided. A B0 field is applied. A self-refocused spatial-spectral (SPSP) RF pulse is applied. A readout of a portion of k-space for the excited slice is performed. A second self-refocused SPSP excitation RF pulse is applied, wherein the second self-refocused SPSP excitation has an 180° echo phase difference from the self-refocused SPSP excitation. A second readout of a portion of k-space for the excited slice was performed. A difference between the readout and the second readout was found. The previous steps were repeated until k-space has been filled for the excited slice. The previous steps were repeated for a plurality of slices.Type: ApplicationFiled: June 10, 2008Publication date: December 24, 2009Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John M. Pauly
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Publication number: 20090230958Abstract: A manifestation of the invention provides a method for slice selective excitation for magnetic resonance imaging (MRI). A B0 field is applied. A STABLE pulse comprising of a BIR-4 envelope sampled by a plurality of subpulses with a duration is applied, where amplitude and frequency modulation functions of the BIR-4 envelope are slowly varying with respect to the duration of the subpulses. A portion of k-space is read out to obtain k-space data. The STABLE pulse and readout are repeated until sufficient k-space has been acquired. A Fourier Transform of the k-space data is taken.Type: ApplicationFiled: March 13, 2008Publication date: September 17, 2009Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John Pauly
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Publication number: 20090137897Abstract: A method for performing spectroscopy using an interleaved readout for at least two species. A B0 field is applied. A first spatial-spectral (SPSP) position resolved spectroscopy sequence (PRESS) excitation with a sufficiently narrow band to excite a first species without exciting a second species is applied. A first readout that measures the first species is performed. A second SPSP PRESS excitation with a sufficiently narrow band to excite the second species without exciting the first species is applied. A second readout that measures the second species is performed.Type: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Priti Balchandani, Daniel Spielman, John Pauly