Patents by Inventor Nadine Dispenza
Nadine Dispenza 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: 20250085373Abstract: In method for MR imaging, an MR signal is acquired for each of a plurality of readout gradient pulses during a respective readout period and an MR image is generated on the basis thereof. A start time of the respective readout period relative to a start time of the respective readout gradient pulse is delayed by a delay duration which is selected randomly or pseudo-randomly from two or more predefined time values, and/or to generate the MR image, the acquired MR signals are processed, wherein the processing includes a frequency conversion based around a center frequency which is randomly or pseudo-randomly selected from two or more predetermined frequency values.Type: ApplicationFiled: September 11, 2024Publication date: March 13, 2025Applicant: Siemens Healthineers AGInventors: Mario Zeller, Nadine Dispenza, Dominik Paul, Christian Meixner
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Patent number: 12248048Abstract: In method for MR imaging, an MR signal is acquired for each of a plurality of readout gradient pulses during a respective readout period and an MR image is generated on the basis thereof. A start time of the respective readout period relative to a start time of the respective readout gradient pulse is delayed by a delay duration which is selected randomly or pseudo-randomly from two or more predefined time values, and/or to generate the MR image, the acquired MR signals are processed, wherein the processing includes a frequency conversion based around a center frequency which is randomly or pseudo-randomly selected from two or more predetermined frequency values.Type: GrantFiled: September 11, 2024Date of Patent: March 11, 2025Assignee: Siemens Healthineers AGInventors: Mario Zeller, Nadine Dispenza, Dominik Paul, Christian Meixner
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Patent number: 11963754Abstract: Accelerated acquisition of scan data by means of magnetic resonance to enable short echo times so that scan data of substances can also be acquired with a transversal relaxation time.Type: GrantFiled: September 30, 2020Date of Patent: April 23, 2024Assignee: Siemens Healthineers AGInventors: Nadine Dispenza, Ralf Kartaeusch, Dominik Paul, Manuel Stich, Mario Zeller
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Patent number: 11880914Abstract: A method serves for MR-based reconstruction of images of a patient. Whether a value of a movement of the patient in at least one motion direction during an MR scan exceeds a respective threshold value is monitored. If this is not the case, an image reconstruction is performed by a Wave-CAIPI method on the basis of identical calibrated PSF subfunctions for all k-space lines. When this is the case, a number of bins are provided that correspond to sequential value ranges of the patient movement in at least one motion direction, the k-space lines are assigned to the bins based on a movement value determined during their respective acquisition, a calibration of PSF subfunctions is performed for at least two bins on the basis of the k-space lines assigned to said bins, and an image reconstruction is performed by a Wave-CAIPI method in such a way that the PSF subfunctions associated with the assigned bins are used for the respective k-space lines.Type: GrantFiled: April 26, 2021Date of Patent: January 23, 2024Assignee: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Mario Zeller
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Patent number: 11733336Abstract: A method a for acquiring magnetic resonance data of an object under examination by means of a magnetic resonance system comprises: in an excitation phase, applying an RF excitation pulse; in a wait phase following the excitation phase, applying at least one first RF refocusing pulse after the applied RF excitation pulse according to a first echo spacing; in an acquisition phase following the wait phase, applying at least two further RF refocusing pulses to generate echo signals according to a second echo spacing, wherein the second echo spacing is smaller than the first echo spacing; and reading out the echo signals generated in the acquisition phase as magnetic resonance data from which image data can be reconstructed, wherein in the wait phase at least two spoiler gradients are switched in the readout direction.Type: GrantFiled: September 27, 2021Date of Patent: August 22, 2023Assignee: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Mario Zeller
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Patent number: 11719779Abstract: An adaptive reconstruction of MR data, including acquired MR data of a core region having core segments and simulated MR data of a peripheral region. The method includes ascertaining a peripheral signal based on the MR data of the peripheral region, determining a scaling factor for each core segment by taking into account the peripheral signal and a mean signal intensity of the MR data for the respective core segment, scaling the MR data of the core region by taking into account the MR data of each core segment and that of the scaling factor corresponding to the respective core segment, generating filtered MR data by combining the scaled MR data of the core region with the MR data of the peripheral region, and reconstructing image data from the filtered MR data.Type: GrantFiled: May 6, 2022Date of Patent: August 8, 2023Assignee: Siemens Healthcare GmbHInventors: Dominik Paul, Marcel Dominik Nickel, Nadine Dispenza, Simon Bauer
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Publication number: 20230194639Abstract: The invention relates to a method for acquiring a magnetic resonance image dataset of a subject, a magnetic resonance imaging system and a non-transitory computer-readable medium. The method comprises the steps: (a) determining scan conditions relating to an imaging protocol which is to be carried out on the subject; (b) based on the scan conditions and/or on predetermined reference parameters, determining whether at least one imaging preparation procedure may be omitted or accelerated to have a shortened duration; (c) depending on the determination of step (b), omitting or carrying out the least one imaging preparation procedure at the standard or at the shortened duration; (d) carrying out the imaging protocol in order to acquire the magnetic resonance image dataset.Type: ApplicationFiled: December 16, 2021Publication date: June 22, 2023Applicant: Siemens Healthcare GmbHInventors: Thorsten Feiweier, Mario Zeller, Bryan Clifford, Zahra Hosseini, Adam Kettinger, Simon Bauer, Nadine Dispenza
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Patent number: 11585884Abstract: A correction method for reducing temperature-related deviations in a gradient response of an MR pulse sequence in MR imaging is provided. An MR pulse sequence that includes at least one nominal test gradient is run. A gradient response to the at least one nominal test gradient is repeatedly acquired by a magnetic field measurement in an examination region. A gradient system transfer function is determined based on the gradient response. A corrected MR pulse sequence is determined based on the gradient system transfer function and of the at least one nominal test gradient.Type: GrantFiled: August 4, 2021Date of Patent: February 21, 2023Assignee: Siemens Healthcare GmbHInventors: Manuel Stich, Dominik Paul, Mario Zeller, Nadine Dispenza
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Publication number: 20220357414Abstract: An adaptive reconstruction of MR data, including acquired MR data of a core region having core segments and simulated MR data of a peripheral region. The method includes ascertaining a peripheral signal based on the MR data of the peripheral region, determining a scaling factor for each core segment by taking into account the peripheral signal and a mean signal intensity of the MR data for the respective core segment, scaling the MR data of the core region by taking into account the MR data of each core segment and that of the scaling factor corresponding to the respective core segment, generating filtered MR data by combining the scaled MR data of the core region with the MR data of the peripheral region, and reconstructing image data from the filtered MR data.Type: ApplicationFiled: May 6, 2022Publication date: November 10, 2022Applicant: Siemens Healthcare GmbHInventors: Dominik Paul, Marcel Dominik Nickel, Nadine Dispenza, Simon Bauer
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Patent number: 11474179Abstract: In a method for MRI of an object, spins of a first material and spins of a second material are excited. An in-phase echo signal is acquired when the spins are in-phase and an out-of-phase echo signal is acquired, when the spins are out of phase. A first image for the first material and/or a second image for the second material is generated by a computing unit depending on the in-phase echo signal and the out-of-phase echo signal. For acquiring the out-of-phase echo signal, a momentum space is sampled asymmetrically in a read-out direction.Type: GrantFiled: January 14, 2021Date of Patent: October 18, 2022Assignee: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Manuel Stich, Mario Zeller
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Patent number: 11397234Abstract: In a method for generating at least one MR image of an object in an MR system comprising a plurality of signal receiving coils, a sequence of RF pulses are applied in order to generate a plurality of MR signal echoes, the MR signal-echoes are detected with the plurality of signal receiving coils in a 3-dimension-al k-space, and the at least one MR image is reconstructed using the non-homogeneous under sampled 3-dimensional k-space based on a compressed sensing technology. The 3-dimensional k-space may be undersampled with a plurality of constant radii corkscrew trajectories having different radii resulting in a non-homogeneous undersampled 3-dimensional k-space.Type: GrantFiled: January 14, 2021Date of Patent: July 26, 2022Assignee: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Manuel Stich, Mario Zeller
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Publication number: 20220099777Abstract: A method a for acquiring magnetic resonance data of an object under examination by means of a magnetic resonance system comprises: in an excitation phase, applying an RF excitation pulse; in a wait phase following the excitation phase, applying at least one first RF refocusing pulse after the applied RF excitation pulse according to a first echo spacing; in an acquisition phase following the wait phase, applying at least two further RF refocusing pulses to generate echo signals according to a second echo spacing, wherein the second echo spacing is smaller than the first echo spacing; and reading out the echo signals generated in the acquisition phase as magnetic resonance data from which image data can be reconstructed, wherein in the wait phase at least two spoiler gradients are switched in the readout direction.Type: ApplicationFiled: September 27, 2021Publication date: March 31, 2022Applicant: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Mario Zeller
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Publication number: 20220043092Abstract: A correction method for reducing temperature-related deviations in a gradient response of an MR pulse sequence in MR imaging is provided. An MR pulse sequence that includes at least one nominal test gradient is run. A gradient response to the at least one nominal test gradient is repeatedly acquired by a magnetic field measurement in an examination region. A gradient system transfer function is determined based on the gradient response. A corrected MR pulse sequence is determined based on the gradient system transfer function and of the at least one nominal test gradient.Type: ApplicationFiled: August 4, 2021Publication date: February 10, 2022Inventors: Manuel Stich, Dominik Paul, Mario Zeller, Nadine Dispenza
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Publication number: 20210350592Abstract: A method serves for MR-based reconstruction of images of a patient. Whether a value of a movement of the patient in at least one motion direction during an MR scan exceeds a respective threshold value is monitored. If this is not the case, an image reconstruction is performed by a Wave-CAIPI method on the basis of identical calibrated PSF subfunctions for all k-space lines. When this is the case, a number of bins are provided that correspond to sequential value ranges of the patient movement in at least one motion direction, the k-space lines are assigned to the bins based on a movement value determined during their respective acquisition, a calibration of PSF subfunctions is performed for at least two bins on the basis of the k-space lines assigned to said bins, and an image reconstruction is performed by a Wave-CAIPI method in such a way that the PSF subfunctions associated with the assigned bins are used for the respective k-space lines.Type: ApplicationFiled: April 26, 2021Publication date: November 11, 2021Inventors: Nadine Dispenza, Dominik Paul, Mario Zeller
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Publication number: 20210223342Abstract: In a method for MRI of an object, spins of a first material and spins of a second material are excited. An in-phase echo signal is acquired when the spins are in-phase and an out-of-phase echo signal is acquired, when the spins are out of phase. A first image for the first material and/or a second image for the second material is generated by a computing unit depending on the in-phase echo signal and the out-of-phase echo signal. For acquiring the out-of-phase echo signal, a momentum space is sampled asymmetrically in a read-out direction.Type: ApplicationFiled: January 14, 2021Publication date: July 22, 2021Applicant: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Manuel Stich, Mario Zeller
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Publication number: 20210223344Abstract: In a method for generating at least one MR image of an object in an MR system comprising a plurality of signal receiving coils, a sequence of RF pulses are applied in order to generate a plurality of MR signal echoes, the MR signal-echoes are detected with the plurality of signal receiving coils in a 3-dimension-al k-space, and the at least one MR image is reconstructed using the non-homogeneous under sampled 3-dimensional k-space based on a compressed sensing technology. The 3-dimensional k-space may be undersampled with a plurality of spiral trajectories having different radii resulting in a non-homogeneous undersampled 3-dimensional k-space.Type: ApplicationFiled: January 14, 2021Publication date: July 22, 2021Applicant: Siemens Healthcare GmbHInventors: Nadine Dispenza, Dominik Paul, Manuel Stich, Mario Zeller
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Publication number: 20210093222Abstract: Accelerated acquisition of scan data by means of magnetic resonance to enable short echo times so that scan data of substances can also be acquired with a transversal relaxation time.Type: ApplicationFiled: September 30, 2020Publication date: April 1, 2021Applicant: Siemens Healthcare GmbHInventors: Nadine Dispenza, Ralf Kartaeusch, Dominik Paul, Manuel Stich, Mario Zeller