公开(公告)号：US20240125874A1

公开(公告)日：2024-04-18

申请号：US18487100

申请日：2023-10-15

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Yuanxun Ethan Wang ,  Lap Kun Yeung ,  Kevin Luong

IPC分类号： G01R33/24

CPC分类号： G01R33/24

摘要： A magnetic field sensor which can achieve sensitivities competitive with modern sensors while simultaneously maintaining a small size, low power consumption, simplicity of design, and low cost. The magnetic field sensor utilizes nonlinear precession dynamics of subatomic spins to attain parametric amplification of a magnetic field. A preliminary experimental implementation of the proposed concept establishes its feasibility and can already demonstrate significant benefits over existing approaches to sensing.

公开(公告)号：US20240118357A1

公开(公告)日：2024-04-11

申请号：US18230650

申请日：2023-08-06

申请人： Sonera Magnetics, Inc

发明人： Dominic Labanowski ,  Nishita Deka

IPC分类号： G01R33/24

CPC分类号： G01R33/24

摘要： Systems and method for a multi-array magnetic sensing component, which can include a circuit base platform; a set of magnetic sensors arranged on the circuit base platform; and a circuit system comprising intermediary circuit components, signal input, and a signal output, the signal input being an electrical oscillator signal input and being directable to each magnetic sensor in the set of magnetic sensors, the signal output including magnetic field measurements from the set of magnetic sensors, wherein each magnetic field measurement is individually selectable, the circuit system being configured to turn on or off subsets of the set of magnetic sensors, and the intermediary circuit components including a mixer.

公开(公告)号：US11789098B2

公开(公告)日：2023-10-17

申请号：US17377515

申请日：2021-07-16

申请人： Siemens Healthcare GmbH

发明人： Stefan Popescu

IPC分类号： G01R33/24 ,  G01R33/00 ,  G01R33/36 ,  G01R33/381 ,  G01R33/032

CPC分类号： G01R33/24 ,  G01R33/0017 ,  G01R33/0322 ,  G01R33/3621 ,  G01R33/3692 ,  G01R33/381

摘要： A measurement device for measuring MR signals in a MR device may include first and second magnetometers and a controller. The first magnetometer may be a quantum spin magnetometer that includes a sensor material having a spin defect center including Zeeman splitting states dependent on an external magnetic field of the MR device, an optical excitation source and a microwave excitation source for electromagnetically exciting the sensor material, and a measurement sensor for measuring optical signals emitted by the excited sensor material element and depending on the Zeeman splitting states. The controller may be configured to determine a working frequency of the microwave excitation source of the first magnetometer from the total magnetic field strength measured by the second magnetometer, and control the microwave excitation source to use the determined working frequency as microwave frequency, such that the first magnetometer measures the MR signals as the optical signal.

公开(公告)号：US11779237B2

公开(公告)日：2023-10-10

申请号：US17828026

申请日：2022-05-30

申请人： Beijing University of Aeronautics and Astronautics

发明人： Jie Tian ,  Yimeng Li ,  Yu An ,  Jing Zhong ,  Jie He ,  Bo Zhang

IPC分类号： A61B5/0515 ,  G01R33/12 ,  G01R33/14 ,  G01R33/24

CPC分类号： A61B5/0515 ,  G01R33/1276 ,  G01R33/14 ,  G01R33/24

摘要： A hysteresis effect-based Field Free Point-Magnetic Particle Imaging (FFP-MPI) method includes the following steps: acquiring a hysteresis loop model of Superparamagnetic Iron Oxide Nanoparticles (SPIOs); calculating to obtain a Point Spread Function (PSF) of the SPIOs on the basis of a sinusoidal excitation magnetic field and the hysteresis loop model of the SPIOs; acquiring an original reconstructed image of FFP-MPI on the basis an FFP moving track and a voltage signal; performing deconvolution on the original image with respect to the PSF considering an hysteresis effect, so as to obtain a final reconstructed image; the artifacts and phase errors of image reconstruction caused by the hysteresis effect of the SPIOs with large particle sizes are reduced, the deficiency in reconstruction by the traditional reconstruction method that ignores the hysteresis effect is overcome, the reconstruction speed and the resolution are greatly improved, and the application range of the SPIOs is expanded.

公开(公告)号：US11762045B2

公开(公告)日：2023-09-19

申请号：US17489978

申请日：2021-09-30

申请人： Sonera Magentics, Inc.

发明人： Dominic Labanowski ,  Nishita Deka

IPC分类号： G01R33/24

CPC分类号： G01R33/24

摘要： Systems and method for a multi-array magnetic sensing component, which can include a circuit base platform; a set of magnetic sensors arranged on the circuit base platform; and a circuit system comprising intermediary circuit components, signal input, and a signal output, the signal input being an electrical oscillator signal input and being directable to each magnetic sensor in the set of magnetic sensors, the signal output including magnetic field measurements from the set of magnetic sensors, wherein each magnetic field measurement is individually selectable, the circuit system being configured to turn on or off subsets of the set of magnetic sensors, and the intermediary circuit components including a mixer.

公开(公告)号：US11733325B2

公开(公告)日：2023-08-22

申请号：US17591586

申请日：2022-02-02

申请人： Siemens Healthcare GmbH

发明人： Patrick Liebig ,  Tom Hilbert

IPC分类号： G01R33/24 ,  G01R33/58 ,  G01R33/54

CPC分类号： G01R33/24 ,  G01R33/543 ,  G01R33/58

摘要： In a method for control, input magnetic field map data is received. In this case, the input magnetic field map data for at least one magnetic field type in each case describes a magnetic field map for a state that an examination object is in at an initial location in the MR apparatus. In this case, the estimated magnetic field map data for at least one magnetic field type in each case describes at least one magnetic field map for in each case a state that the examination object is in at an alternative location that is different compared to the initial location. Control data is determined by the system control unit, using the estimated magnetic field map data or using the input magnetic field map data and the estimated magnetic field map data. The control data is suitable for controlling the MR apparatus.

公开(公告)号：US20230184853A1

公开(公告)日：2023-06-15

申请号：US17922473

申请日：2021-04-15

申请人： SUMIDA CORPORATION ,  Kyoto University

发明人： Yoshiharu YOSHII ,  Tsutomu OOTSUKA ,  Masateru HASHIMOTO ,  Norikazu MIZUOCHI ,  Kan HAYASHI ,  Yuki TAKEMURA

IPC分类号： G01R33/24

CPC分类号： G01R33/24

摘要： A magnetic resonance member 1 includes a diamond crystal including plural diamond nitrogen vacancy center, and a high-frequency magnetic field generator 2 applies magnetic field of microwave to the magnetic resonance member 1. The aforementioned plural diamond nitrogen vacancy centers include diamond nitrogen vacancy centers arranged in directions of predetermined plural axes among four axes that indicates four connection directions of carbon atoms in the diamond crystal; and the aforementioned magnetic resonance member 1 is arranged in a direction that provides a substantially largest sensitivity of the measurement target magnetic field in the diamond nitrogen vacancy centers arranged in the predetermined plural axes.

公开(公告)号：US20180299524A1

公开(公告)日：2018-10-18

申请号：US15951370

申请日：2018-04-12

申请人： Siemens Healthcare GmbH

发明人： Thorsten Feiweier

IPC分类号： G01R33/483 ,  G01R33/56 ,  G01R33/24

CPC分类号： G01R33/4835 ,  G01R33/24 ,  G01R33/5608 ,  G01R33/5611

摘要： In an acquisition of magnetic resonance (MR) data from a volume portion of an object, a set of a number of planned volume elements is predefined in the volume portion, wherein MR data are to be acquired from each of the planned volume elements. Furthermore, conditions that are to be fulfilled in the acquisition of the MR data of the planned volume elements are predefined. Dependent upon the planned volume elements and the conditions, a set of additional volume elements is determined. The MR data are acquired from at least two volume elements simultaneously, the at least two volume elements including one volume element from the set of the planned volume elements and one volume element from the set of the additional volume elements.

公开(公告)号：US09995804B2

公开(公告)日：2018-06-12

申请号：US14396974

申请日：2013-04-09

申请人： KONINKLIJKE PHILIPS N.V.

发明人： James Howard Kralick ,  Frank Battista ,  Jeffrey Edward Leach ,  Dennis Ambrose Becker

IPC分类号： G01R33/30 ,  G01R33/385 ,  G01R33/387 ,  G01R33/24

CPC分类号： G01R33/3858 ,  G01R33/24 ,  G01R33/243 ,  G01R33/307 ,  G01R33/387

摘要： A magnetic resonance imaging (MRI) system includes an MRI magnet (100) including a bore (101) and having a magnetic field and a gradient coil (400) disposed within the bore and having an isocenter (404). A first location within the MRI magnet is determined with respect to a first predetermined reference surface of the MRI magnet, the first location representing a center (104) of the magnetic field. A second location within the gradient coil is determined with respect to a second predetermined reference surface of the gradient coil, the second location representing the isocenter. When the gradient coil is installed within the bore, the second predetermined reference surface abuts the first predetermined reference surface. The first predetermined reference surface is adjusted to an adjusted position, the adjusted position being determined as a function of the first location and the second location and corresponding to a position of the first predetermined reference surface at which the first location coincides with the second location when the gradient coil is installed within the bore.

公开(公告)号：US09989616B2

公开(公告)日：2018-06-05

申请号：US15855939

申请日：2017-12-27

申请人： Micron Technology, Inc.

发明人： Zengtao T. Liu

IPC分类号： G11C11/00 ,  G01R33/58 ,  G01R33/12 ,  G01R33/24

CPC分类号： G01R33/58 ,  G01R33/1284 ,  G01R33/24 ,  G11C5/025 ,  G11C5/063 ,  G11C7/1087 ,  G11C7/1093 ,  G11C8/14 ,  G11C13/0004 ,  G11C13/0026 ,  G11C13/003 ,  G11C2213/18 ,  G11C2213/71 ,  G11C2213/72 ,  G11C2213/77 ,  H01L27/2409 ,  H01L27/2427 ,  H01L27/2481 ,  H01L45/06 ,  H01L45/1226 ,  H01L45/1233 ,  H01L45/14 ,  H01L45/144

摘要： Some embodiments include memory arrays. The memory arrays can have global bitlines extending along a first horizontal direction, vertical local bitlines extending perpendicularly from the global bitlines, and wordlines extending along a second horizontal direction which is perpendicular to the first horizontal direction. The global bitlines may be subdivided into a first series at a first elevational level, and a second series at a second elevational level which is different from the first elevational level. The global bitlines of the first series can alternate with the global bitlines of the second series. There can be memory cell material directly between the wordlines and the vertical local bitlines. The memory cell material may form a plurality of memory cells uniquely addressed by wordline/global bitline combinations. Some embodiments include cross-point memory cell units that have areas of about 2F2.