Patents Examined by Rishi R Patel
-
Patent number: 12181556Abstract: In one embodiment, an MRI apparatus includes: processing circuitry configured to: set a first pulse sequence and a second pulse sequence, wherein, in the first pulse sequence, a first gradient pulse is applied between two adjacent refocusing pulses, and, in the second pulse sequence, a second gradient pulse being different in pulse shape from the first gradient pulse is applied between two adjacent refocusing pulses, wherein: the scanner is configured to acquire first signals and second signals; and the processing circuitry is configured to generate at least one first image and at least one second image; and calculate a T2 value of a body fluid of the object from the at least one first image and the at least one second image in such a manner that influence of movement including diffusion of the body fluid is removed.Type: GrantFiled: May 26, 2022Date of Patent: December 31, 2024Assignee: CANON MEDICAL SYSTEMS CORPORATIONInventors: Masao Yui, Aina Ikezaki
-
Patent number: 12178562Abstract: A method for performing a magnetic resonance measurement of a patient using a magnetic resonance apparatus is provided. The magnetic resonance apparatus includes a radiofrequency antenna unit for producing an excitation pulse. A first B0 field map for a first motion state of the patient, and a second B0 field map for a second motion state of the patient are provided. A first excitation pulse for the first motion state, and a second excitation pulse for the second motion state are determined based on the first B0 field map and the second B0 field map. A magnetic resonance measurement is performed, during which the motion state of the patient is monitored. When the patient is in the first motion state, the radiofrequency antenna unit transmits the first excitation pulse. When the patient is in the second motion state, the radiofrequency antenna unit transmits the second excitation pulse.Type: GrantFiled: March 17, 2022Date of Patent: December 31, 2024Assignee: Siemens Healthineers AGInventors: David Grodzki, Dieter Ritter
-
Patent number: 12164011Abstract: A method for proton resonance frequency shift (PRF) and T1-based temperature mapping using a magnetic resonance imaging (MRI) system includes acquiring, using the MRI system, a set of magnetic resonance (MR) data from a region of interest of a subject by performing a variable-flip-angle multi-echo gradient-echo 3D stack-of-radial pulse sequence. The pulse sequence is configured to acquire radial k-space data in a plurality of segments, each segment acquired with each of a plurality of flip angles. The method further includes generating at least one T1 map based on the set of MR data, generating at least one PRF temperature map based on the set of MR data, generating at least one T1-based temperature map based on the set of MR data and displaying the PRF temperature map and the T1-based temperature map. In another embodiment, the MR data may be used to generate a plurality of quantitative parameter maps for each of the plurality of MR parameters such as T1, proton-density fat fraction (PDFF), and R2*.Type: GrantFiled: April 15, 2020Date of Patent: December 10, 2024Assignee: The Regents of the University of CaliforniaInventors: Holden H. Wu, Le Zhang, Tess Armstrong
-
Patent number: 12153114Abstract: A method for 3D oscillating-gradient prepared gradient spin-echo imaging and a device. The imaging method comprises the following steps: first, using a global saturation module to destroy previous residual transverse magnetization; second, embedding a pair of trapezoidal cosine oscillating gradients into a 90°x-180°y-90°?x radiofrequency pulse by a diffusion encoding module, to separate diffusion encoding from signal acquisition; then, using a fat saturation module to suppress a fat signal; finally, acquiring a signal by means of gradient spin-echo readout, and correcting phase errors among multiple excitations by multiplexed sensitivity-encoding reconstruction. Compared with a 2D plane echo-based oscillating gradient diffusion sequence used on a 3T clinical system, a 3D oscillating-gradient prepared gradient spin-echo sequence effectively reduces the imaging time, improves the signal to noise ratio, and is beneficial to clinical transformation of time-dependent diffusion MRI technology.Type: GrantFiled: September 26, 2022Date of Patent: November 26, 2024Assignee: ZHEJIANG UNIVERSITYInventors: Dan Wu, Haotian Li, Yi Zhang
-
Patent number: 12146932Abstract: A magnetic resonance imaging (MRI) system and method integrating multi-nuclide synchronous imaging and spectral imaging is provided. The MRI system includes a spectral imaging module, a multi-nuclide synchronous imaging module, and a spectral reconstruction and image fusion module, where the spectral imaging module is configured to acquire a spectrum of a nuclide Nuc; the multi-nuclide synchronous imaging module is configured to perform synchronous imaging of nuclides Nuc1 . . . Nucn, where when n=1, Nucl is 1H; and when n>1, Nucn is a non-1H nuclide; and the spectral reconstruction and image fusion module is configured to receive the spectrum of the nuclide Nuc and images of the nuclides Nuc1 . . . Nucn, and acquire spatial distribution information of compounds of the nuclide Nuc and spatial distribution information of the non-1H nuclide through fusion. The system and method can synchronously acquire MR signals of different nuclides, and reconstruct and fuse non-1H nuclide images.Type: GrantFiled: February 21, 2024Date of Patent: November 19, 2024Assignee: HARBIN MEDICAL UNIVERSITYInventors: Xilin Sun, Chunsheng Yang, Kai Wang, Yongyi Wu, Lijiao Wang, Lili Yang, Lina Wu
-
Patent number: 12140652Abstract: A system, method and computer program product for generating a data record of a training dataset set configured to train a neural network for determination of the concentration of a particular target molecule in an NMR sample. An NMR spectrum associated with a known concentration of the target molecule is obtained. The obtained NMR spectrum is adjusted by applying a random shift to generate an adjusted NMR spectrum. A background generator adds a background spectrum which reflects contributions of impurities in the NMR sample. The resulting NMR spectrum together with the information about the concentration of the target molecule is then stored as a new data record of the training dataset.Type: GrantFiled: December 15, 2023Date of Patent: November 12, 2024Assignee: Bruker BioSpin GmbH & Co. KGInventor: Silvère Lux
-
Patent number: 12140654Abstract: A plurality of reception coils are used to acquire magnetic resonance signals using parallel imaging and a k-space acquisition scheme, in which alternatingly the central region and one of the peripheral k-space portions are imaged in acquisition steps of a pair, such that after a partition number of such pairs, the whole k-space to be acquired has been imaged and a sliding reconstruction window can be applied to reconstruct an additional magnetic resonance image after each acquisition of such a pair. A time series of magnetic resonance images forming the magnetic resonance data set is then reconstructed from the magnetic resonance signals and sensitivity information regarding the plurality of reception coils by using the sliding reconstruction window and a reconstruction technique for undersampled magnetic resonance data. The k-space trajectories for each acquisition step are chosen to allow controlled aliasing in all three spatial dimensions including the readout direction.Type: GrantFiled: October 17, 2022Date of Patent: November 12, 2024Assignee: SIEMENS HEALTHINEERS AGInventors: Julian Richter, Manuel Stich
-
Patent number: 12130347Abstract: Provided is a method for performing reconstruction and noise removal with high accuracy on various undersampling patterns including equidistant undersampling. An image processing unit that processes measurement data acquired by an MRI apparatus performs image reconstruction by using measurement data on respective channels measured in a predetermined undersampling pattern and sensitivity distributions of respective reception coils. At this time, denoising of a reconstructed image and a calculation for maintaining consistency between original measurement data and the measurement data on the respective channels created from denoised images are sequentially processed. Accordingly, image restoration and denoising with high accuracy are possible without depending on the undersampling pattern.Type: GrantFiled: October 20, 2022Date of Patent: October 29, 2024Assignee: FUJIFILM CorporationInventors: Tomoki Amemiya, Toru Shirai, Atsuro Suzuki, Yukio Kaneko, Hiroki Shoji, Keisuke Nishio
-
Patent number: 12123929Abstract: The present invention provides a method for structurally designing that article of manufacture and a constructed and operational article of manufacture that will allow the inclusion of minimally coupled higher order/degree shim coils in any magnetic resonance apparatus. The novel system and methodology includes determining the shim coil terminal voltage without any prior or advance knowledge of the configuration of the electrical windings of the imaging gradient coil that is inducing that voltage.Type: GrantFiled: February 7, 2022Date of Patent: October 22, 2024Assignee: Resonance Research, Inc.Inventors: Hoby P. Hetherington, Kai-Ming Lo, William F. B. Punchard, Piotr M. Starewicz
-
Patent number: 12092714Abstract: A shimming method and device, an electronic device, and a storage medium are disclosed. The shimming method includes: obtaining object static magnetic field distribution information corresponding to a target object, the object static magnetic field distribution information including the static magnetic field distribution information of the target object under the action of a main magnet of a magnetic resonance system; determining a target static magnetic field based on the object static magnetic field distribution information and a preset shim coil magnetic field distribution model; and adjusting at least one shim coil parameter in the shim coil magnetic field distribution model until a magnetic field uniformity of the target static magnetic field satisfies a preset condition, and accordingly obtaining at least one target shim coil parameter.Type: GrantFiled: November 22, 2022Date of Patent: September 17, 2024Assignee: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCESInventors: Hairong Zheng, Qiaoyan Chen, Ye Li, Chao Luo, Xin Liu
-
Patent number: 12078707Abstract: A magnetic resonance (MR) acquisition acceleration method is provided. The method includes, for each acquisition of a plurality of acquisitions, generating an excitation radio frequency (RF) pulse that excites a plurality of slices, applying, to a subject by an MR system, the excitation RF pulse, and acquiring MR signals of the plurality of slices. A number of slices in the plurality of slices is not a power of two, wherein generating an excitation RF pulse further includes modulating a base excitation RF pulse with a different modulation function during each acquisition. A number of acquisitions is equal to the number of slices, and MR signals from each acquisition are algebraic combinations of MR signals of individual slices. The method also includes reconstructing MR images of individual slices based on the MR signals from the plurality of acquisitions, and outputting the reconstructed images of the individual slices.Type: GrantFiled: April 8, 2022Date of Patent: September 3, 2024Assignee: GE PRECISION HEALTHCARE LLC.Inventors: Sudhir Ramanna, Ramesh Venkatesan
-
Patent number: 12078704Abstract: The disclosure relates to techniques for executing a measurement sequence in an MRI system, wherein a plurality of measurement subsequences are to be executed within the measurement sequence, each measurement subsequence comprising measurement blocks to be interleaved on a time scale of the MRI system. For each measurement subsequence a respective time value defines when the next measurement block is to be executed on a global time scale by the MRI system. The measurement subsequences are stored in a container ordered according to their respective time values, and the first measurement subsequence is accessed from the subsequence list for execution by the MRI system in run-time.Type: GrantFiled: March 11, 2021Date of Patent: September 3, 2024Assignee: Seimens Healthineers AGInventor: Thomas Kluge
-
Patent number: 12072404Abstract: A system and method of mapping and correcting the inhomogeneity of a magnetic field within an object using an Magnetic Resonance Imaging (MRI) system where there is a single dominant resonance. The method includes acquiring at least three MRI images, each at different echo times (TE). At least two ?TE images (?TEi=1 . . . N) are generated based on the at least three MRI images, wherein the subscripts I=1 N refer to images with sequentially increasing ?TE times. Aliasing in the ?TE1 image is permitted. The ?TE times of ?TE1 and ?TE2 are set such that the alias points at which wrapping occurs in ?TE1 does not overlap with the alias points of ?TE2. Each ?TE image is unwrapped. A final B0 map is set to the unwrapped ?TEN image.Type: GrantFiled: November 19, 2021Date of Patent: August 27, 2024Assignee: Resonance Research, Inc.Inventor: Hoby P. Hetherington
-
Patent number: 12055609Abstract: Eddy current induced magnetic fields (MF) are compensated in a magnetic resonance imaging system. An MR-sequence (M) includes a number of gradients. A dataset includes values of an amplitude and a time constant of eddy current fields of a number of gradients on at least one gradient axis. A number of points in time within the time period of the MR-sequence are defined. A number of constant currents are calculated for a number of coils of the magnetic resonance imaging system based on the dataset. The number of constant currents is designed to compensate at least at the one defined point in time (PT1, PT2). The calculated number of constant currents are applied on the related coils prior or during the application of the MR-sequence or a section of the MR-sequence.Type: GrantFiled: October 10, 2019Date of Patent: August 6, 2024Assignee: Siemens Healthineers AGInventors: Uvo Hölscher, Michael Köhler, Daniel Niederlöhner, Alto Stemmer
-
Patent number: 12055614Abstract: According to a method for characterizing a motion of an object, a reference signal is emitted into a target region and two or more receiver coil signals are generated in response to the reference signal by two or more receiver coils. A motion signal characterizing a motion of the object is determined by a computing unit depending on temporal modulations of the two or more receiver coil signals. A correlation coefficient of the motion signal and a receiver coil signal is computed by the computing unit. A reference correlation coefficient is determined by the computing unit depending on a location of the receiver coil based on a predetermined reference correlation map. The motion signal is corrected by the computing unit depending on a correlation coefficient and the reference correlation coefficient.Type: GrantFiled: March 2, 2022Date of Patent: August 6, 2024Assignee: Siemens Healthineers AGInventors: Mario Bacher, Peter Speier
-
Patent number: 11982727Abstract: A pilot tone signal generator, a magnetic resonance tomograph, a method for transmission of a synchronization signal, and a computer program product are disclosed. The pilot tone signal generator includes a receive unit for receipt of a synchronization signal of a system control unit of a magnetic resonance tomograph. The synchronization signal may include a clock signal, and the pilot tone signal generator is configured to emit a pilot tone signal as a function of the synchronization signal.Type: GrantFiled: August 29, 2022Date of Patent: May 14, 2024Assignee: Siemens Healthineers AGInventors: Jan Bollenbeck, Peter Speier, Mario Bacher
-
Patent number: 11940508Abstract: A magnetic particle imaging (MPI) and fluorescence molecular tomography (FMT)-fused multimodal imaging system and method for a small animal are provided. The multimodal imaging system includes an image processing module, a display module, a control module, an object table, a gradient coil, a driving coil, a reception coil, a fluorescence camera, and a light source module, where the gradient coil includes a first rounded rectangular coil and a second rounded rectangular coil; the driving coil includes a third rounded rectangular coil, a fourth rounded rectangular coil, and a fifth rounded rectangular coil; and the reception coil is a circular coil.Type: GrantFiled: November 1, 2023Date of Patent: March 26, 2024Assignee: Beijing University of Aeronautics and AstronauticsInventors: Jie Tian, Lishuang Guo, Jiangang Liu, Yu An
-
Patent number: 11933870Abstract: For detecting motion in MR imaging, a regression model, such as a convolutional neural network, is machine trained. To generalize to MR imagers, MR contrasts, or other differences in MR image generation, the regression model is trained adversarially. The discriminator for adversarial training discriminates between classes of the variation source (e.g., type of MR imager or type of contrast) based on values of features learned in the regression model for detecting motion. By adversarial training, the regression model learns features that are less susceptible or invariant to variation in image source.Type: GrantFiled: June 19, 2019Date of Patent: March 19, 2024Assignee: Siemens Healthineers AGInventors: Silvia Bettina Arroyo Camejo, Benjamin L. Odry, Xiao Chen, Mariappan S. Nadar
-
Patent number: 11921180Abstract: A method for controlling a magnetic resonance imaging system, including: selecting a plurality of spatially non-selective initial RF-pulses each having a predefined pulse shape and a predefined frequency; determining a combined RF-pulse from the initial RF-pulses by choosing a time-offset comprising a relative application time-shift between the initial RF-pulses, wherein this time-offset is chosen such that the initial RF-pulses overlap; and including the combined RF pulse in a pulse sequence applied in a magnetic resonance imaging system.Type: GrantFiled: December 16, 2021Date of Patent: March 5, 2024Assignee: Siemens Healthcare GmbHInventors: Thorsten Feiweier, Bryan Clifford, Tom Hilbert
-
Patent number: 11899086Abstract: A magnetic resonance imaging apparatus includes sequence controlling circuitry and processing circuitry. The sequence controlling circuitry executes (i) a first pulse sequence in which a spatially selective Inversion recovery (IR) pulse and a spatially non-selective IR pulse are applied, and (ii) a second pulse sequence in which the spatially non-selective IR pulse is applied without applying the spatially selective IR pulse, while varying the first TI period, with respect to a plurality of first TI periods. The sequence controlling circuitry executes (iii) the third pulse sequence in which the spatially selective IR pulse and the spatially non-selective IR pulse are applied, and (iv) the fourth pulse sequence in which the spatially non-selective IR pulse is applied without applying the spatially selective IR pulse. The processing circuitry generates a magnetic resonance image of an imaged region based on data obtained from the third pulse sequence and the fourth pulse sequence.Type: GrantFiled: January 12, 2023Date of Patent: February 13, 2024Assignee: CANON MEDICAL SYSTEMS CORPORATIONInventors: Mitsue Miyazaki, Yoshimori Kassai