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1. 发明申请

WO2020201417A1 MAGNETFELDSONDE, HERSTELLUNG EINER SOLCHEN UND VERFAHREN ZUM BETRIEB EINER MAGNETFELDSONDE 审中-公开
公开(公告)号：WO2020201417A1
公开(公告)日：2020-10-08
申请号：PCT/EP2020/059387
申请日：2020-04-02
申请人： ALBERT-LUDWIGS-UNIVERSITÄT FREIBURG
发明人： WEHKAMP, Niklas , ZAITSEV, Maxim , ROVEDO, Philipp
IPC分类号： G01R33/24
摘要： Die Erfindung betrifft eine Magnetfeldsonde (1) mit einer Kapsel (3), in der eine MR-aktive Substanz (5) eingekapselt ist. Es wird insbesondere vorgeschlagen, zwei Spulen (7, 9) in der Kapsel (3) anzuordnen. Es werden ferner vorteilhafte Herstellungsverfahren für Magnetfeldsonden (1) beschrieben und nützliche Verwendungen der erfindungsgemäßen Magnetfeldsonde (1) wie auch Verfahren, bei denen derartige Magnetfeldsonden (1) und Anordnungen von Magnetfeldsonden (1) verwendet werden.

2. 发明申请

WO2020141536A1 SYSTEM AND METHODS FOR MEASURING LINEAR AND ROTATIONAL ACCELERATIONS AND MAGNETIC FIELD STRENGTHS USING INDIVIDUAL ATOMS WITHIN AN OPTICAL LATTICE FORMED BY LASERS 审中-公开
公开(公告)号：WO2020141536A1
公开(公告)日：2020-07-09
申请号：PCT/IL2020/050012
申请日：2020-01-05
申请人： B.G. NEGEV TECHNOLOGIES AND APPLICATIONS LTD.
发明人： KUZMENKO, Igor , KUZMENKO, Tetyana , BAND, Yehuda , AVISHAI, Yishai
IPC分类号： G01R33/24 , G01R33/12
摘要： A metrology device for accurate and precise measurement of a property selected from the group consisting of magnetic field strength, linear and rotational acceleration and gravitational field strength, comprising an optical lattice created by coherent electro-magnetic waves generated by 3, 4 or 6 coherent lasers arranged in a ring at 120 degree, 90 degree or 60 degree intervals, and individual atoms trapped within the optical lattice, and a system comprising an absorption line detector for monitoring shifts in absorption lines of atoms within the optical lattice.

3. 发明申请

WO2019137951A1 MRI METHOD FOR DETERMINING A MAGNETIC FIELD MAP FROM A BO REFERENCE SCAN AND A WASSR SCAN 审中-公开
公开(公告)号：WO2019137951A1
公开(公告)日：2019-07-18
申请号：PCT/EP2019/050430
申请日：2019-01-09
申请人： KONINKLIJKE PHILIPS N.V.
发明人： DE WEERDT, Elwin
IPC分类号： G01R33/24 , G01R33/48 , G01R33/56 , G01R33/561
CPC分类号： G01R33/243 , G01R33/4828 , G01R33/5605 , G01R33/5615
摘要： The invention provides for a medical imaging system (100, 300). The medical imaging system (100, 300) comprises a processor (104). Execution of machine executable instructions(120)causes the processor (104) to: receive magnetic resonance data, wherein the magnetic resonance datacomprises B0 field data (122) of a reference scan for a plurality of voxels and water saturation data (124) of a WASSR scan for a subset of voxels of the plurality of voxels, the water saturation data (124) comprising data of a limited number of sample points; determine a local absolute water saturation frequency (130) for each voxel of the subset using the water saturation data (124) of the WASSR scan; and reconstruct a field map (132) comprising a local absolute water saturation frequency for each voxel of the plurality of voxels, wherein the reconstruction comprises determining relative frequency differences between the voxels using the B0 field data (122) of the reference scan and adding a frequency offset to the relative frequency differences based on the determined local absolute water saturation frequencies (130) of the subset.

4. 发明申请

WO2019038083A1 MAGNETIC RESONANCE IMAGING WITH A VARIABLE FIELD MAGNET 审中-公开
公开(公告)号：WO2019038083A1
公开(公告)日：2019-02-28
申请号：PCT/EP2018/071449
申请日：2018-08-08
申请人： KONINKLIJKE PHILIPS N.V.
发明人： GLEICH, Bernhard
IPC分类号： G01R33/24 , G01R33/44 , A61B5/053 , G01R33/567 , G01R33/48
摘要： The invention provides for a magnetic resonance imaging (MRI) (100) system comprising a main magnet (102) with an with an adjustable main magnetic field. The MRI system further comprises a current source (124) for supplying RF current between multiple electrodes (122, 122') divided between a first portion (122) and a second portion (122'). The current source is configured for supplying the RF current between the first portion and the second portion. Execution of the machine executable instructions cause a processor controlling the MRI system to: set (200) the average magnetic field strength within the imaging zone to a first value; set (202) the average magnetic field strength within the imaging zone to a second value, the second value is lower than the first value; control (204) the current source to have a known RF current (144) travel between the first portion of the electrodes and the second portion of the electrodes; acquire (206) the magnetic resonance data from the subject by controlling the magnetic resonance imaging system with readout gradient commands according to a three-dimensional imaging protocol; reconstruct (208) three-dimensional image data (148) from the magnetic resonance data; and calculate (210) a resistive model (150) of the subject using the three-dimensional image data and the known RF current through the electrodes.

5. 发明申请

WO2018174905A1 HIGH SPEED SEQUENTIAL CANCELLATION FOR PULSED MODE 审中-公开
公开(公告)号：WO2018174905A1
公开(公告)日：2018-09-27
申请号：PCT/US2017/024167
申请日：2017-03-24
申请人： LOCKHEED MARTIN CORPORATION
发明人： BRUCE, Gregory Scott , KAUP, Peter G. , MANICKAM, Arul
IPC分类号： G01R33/24 , B01J3/06 , B64C39/02 , C30B29/04 , G01N21/64 , G01Q60/52
CPC分类号： G01R33/24 , C30B29/04 , G01N24/10 , G01R33/323 , G01R33/60
摘要： Some methods and configurations are disclosed for high bandwidth acquisition of magnetometer data with increased sensitivity. Some embodiments provide for increased bandwidth and sensitivity of the magnetometer by eliminating a reference signal for full repolarization of the magneto-optical defect center material prior to acquisition. Elimination of the reference signal eliminates the time needed to repolarize the magneto-optical defect center material and the acquisition time for the reference signal. Some implementations can include activating a radiofrequency (RF) pulse sequence to apply an RF field to the magneto-optical defect center material and acquiring a magnetic field measurement using the magneto-optical defect center material. The magnetic field measurement may be acquired independent of a reference magnetic field measurement.

6. 发明申请

WO2018093847A1 SYSTEM AND METHOD FOR PROTON DENSITY MAPPING AND RECEIVER BIAS CORRECTION USING MAGNETIC RESONANCE FINGERPRINTING (MRF) 审中-公开
公开(公告)号：WO2018093847A1
公开(公告)日：2018-05-24
申请号：PCT/US2017/061726
申请日：2017-11-15
申请人： CASE WESTERN RESERVE UNIVERSITY
发明人： GRISWOLD, Mark, A. , DESHMANE, Anagha
IPC分类号： G01R33/24 , G01R33/44 , G01R33/46 , G01R33/465
摘要： A system and method is provided for correcting receiver bias during quantitative proton density mapping with magnetic resonance fingerprinting (MRF). The method comprises acquiring MRF data from a region of interest in a subject by performing a pulse sequence using a series of varied sequence blocks to elicit a series of signal evolutions. The method further comprises comparing the MRF data to a MRF dictionary to simultaneously map proton density and another tissue property from the region of interest, the proton density map having a proton density signal and a receiver sensitivity profile signal. The method also includes quantifying the proton density signal and the receiver sensitivity profile signal using parameters provided by the proton density map and the tissue property map, and generating a quantitative map from the region of interest based on the proton density signal.

7. 发明申请

WO2018071754A1 SYSTEMS AND METHODS FOR STEADY-STATE ECHO MAGNETIC RESONANCE IMAGING 审中-公开
标题翻译：用于稳态回波磁共振成像的系统和方法
公开(公告)号：WO2018071754A1
公开(公告)日：2018-04-19
申请号：PCT/US2017/056487
申请日：2017-10-13
申请人： REGENTS OF THE UNIVERSITY OF MINNESOTA
发明人： KOBAYASHI, Naoharu , IDIYATULLIN, Djaudat , GARWOOD, Michael
IPC分类号： G01R33/561 , G01R33/565 , G01R33/24 , G01R33/28
摘要： A method for acquiring magnetic resonance imaging data from a subject. The method includes performing a series of radio frequency pulses formed of individual RF pulses applied with a constant time interval between each of the individual RF pulses to form a consistent magnetic field about at least of a region of interest in the subject, where the RF pulse has a flip angle of less than 30 degrees. The method also includes performing phase encoding gradients to achieve spatial encoding and performing an imaging acquisition process over an acquisition window to acquire imaging data. The method further includes performing phase encoding rephasing gradients and repeating the preceding steps such that a time between a center of the acquisition window and a center of a first RF pulse in a first RF pulse in a repetition of the RF pulses is equal to the constant pulse interval.
摘要翻译：用于从对象采集磁共振成像数据的方法。该方法包括执行由各个RF脉冲形成的一系列射频脉冲，这些射频脉冲由在各个RF脉冲中的每一个之间以恒定的时间间隔施加，以围绕对象中的至少一个感兴趣区域形成一致的磁场，其中RF脉冲翻转角度小于30度。该方法还包括执行相位编码梯度以实现空间编码并且在采集窗口上执行成像采集处理以采集成像数据。该方法还包括执行相位编码重定相梯度并重复前面的步骤，使得重复RF脉冲中的采集窗口的中心与第一RF脉冲中的第一RF脉冲的中心之间的时间等于常数脉冲间隔。

8. 发明申请

WO2018065233A1 DIRECT MEASUREMENT OF THE B0-OFF-RESONANCE FIELD DURING MAGNETIC RESONANCE FINGERPRINTING 审中-公开
标题翻译：磁共振指纹图谱中B0非共振场的直接测量
公开(公告)号：WO2018065233A1
公开(公告)日：2018-04-12
申请号：PCT/EP2017/073974
申请日：2017-09-22
申请人： KONINKLIJKE PHILIPS N.V.
发明人： MEINEKE, Jan, Jakob , AMTHOR, Thomas, Erik , KOKEN, Peter , SOMMER, Karsten
IPC分类号： G01R33/24 , G01R33/44 , G01R33/56 , G01R33/50
CPC分类号： G01R33/443 , G01R33/243 , G01R33/246 , G01R33/50 , G01R33/5608
摘要： The invention provides for a magnetic resonance imaging system (100). Machine executable instructions cause a processor controlling the MRI system to control (200) the magnetic resonance imaging system with the pulse sequence commands to acquire the magnetic resonance data. The pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting protocol. The pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the magnetic resonance data during multiple pulse repetitions (302). The pulse sequence commands are configured for controlling the magnetic resonance imaging system to cause gradient induced spin rephasing at least twice during each of the multiple pulse repetitions using a gradient magnetic field generating system (110, 112). The pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire at least two magnetic resonance signals during each of the multiple pulse repetitions. Each of the at least two magnetic resonance signals is measured during a separate one of the gradient induced spin rephasing. The magnetic resonance data comprises the at least two magnetic resonance signals acquired during each of the multiple pulse repetitions. Execution of the machine executable instructions further cause the processor to calculate (202) a B0-off-resonance map (158) using the magnetic resonance data, wherein the B0-off-resonance map is descriptive of a B0-off-resonance magnetic field of the magnetic resonance imaging system when the subject is within the imaging zone, wherein the B0-off-resonance map is at least partially calculated using at least two magnetic resonance signals measured during a single pulse repetition. Execution of the machine executable instructions further cause the processor to generate (204) at least one magnetic resonance parametric map by comparing the magnetic resonance data with a magnetic resonance fingerprinting dictionary (152).
摘要翻译：本发明提供了一种磁共振成像系统（100）。机器可执行指令使控制MRI系统的处理器利用脉冲序列命令来控制（200）磁共振成像系统以获取磁共振数据。脉冲序列命令被配置用于控制磁共振成像系统以根据磁共振指纹识别协议来采集磁共振数据。脉冲序列命令被配置用于控制磁共振成像系统以在多次脉冲重复期间采集磁共振数据（302）。脉冲序列命令被配置为使用梯度磁场生成系统（110,112）控制磁共振成像系统以在多个脉冲重复中的每一个期间至少两次引起梯度感应自旋重相移。脉冲序列命令被配置用于控制磁共振成像系统以在多个脉冲重复中的每个脉冲重复期间获取至少两个磁共振信号。至少两个磁共振信号中的每一个在梯度引起的自旋重相位中的单独的一个期间被测量。磁共振数据包括在多个脉冲重复中的每个脉冲重复期间获取的至少两个磁共振信号。机器可执行指令的执行还使处理器使用磁共振数据计算（202）B0非共振图（158），其中B0非共振图描述B0非共振磁场当所述对象位于所述成像区内时，所述磁共振成像系统的所述B 0非共振图是至少部分地使用在单个脉冲重复期间测量的至少两个磁共振信号来计算的。机器可执行指令的执行还使得处理器通过将磁共振数据与磁共振指纹字典（152）进行比较来生成（204）至少一个磁共振参数图。

9. 发明申请

WO2017157872A1 SUSCEPTIBILITY MAPPING OF A MOVING SUBJECT 审中-公开
标题翻译：移动主体的敏感性映射
公开(公告)号：WO2017157872A1
公开(公告)日：2017-09-21
申请号：PCT/EP2017/055884
申请日：2017-03-14
申请人： KONINKLIJKE PHILIPS N.V.
发明人： KATSCHER, Ulrich , MEINEKE, Jan, Jakob
IPC分类号： G01R33/44 , G01R33/565 , G01R33/24
CPC分类号： G01R33/563 , G01R33/243 , G01R33/443 , G01R33/56509 , G01R33/56536 , G06T7/20 , G06T7/70 , G06T11/006 , G06T2207/10088
摘要： The invention relates to a magnetic resonance imaging system (10), the system comprising a magnetic resonance imaging device (12) for acquiring data from a moving subject (14), especially a fetus or a part of said fetus; and an image generator (30) for generating an image of said moving subject (14), wherein the magnetic resonance imaging device (12) is configured to acquire the data from the subject (14) at different positions of said subject (14) with respect to a magnetization direction B 0 , utilizing the movement of the subject (14); and wherein the image generator (30) is configured to - determine the position and/or orientation of said subject (14) during the respective data acquisition; - reconstruct phase images from the acquired data; and - generate a susceptibility map based on the reconstructed phase images. The invention further relates to a corresponding method for generating an image of the subject (14).
摘要翻译：本发明涉及一种磁共振成像系统（10），该系统包括磁共振成像设备（12），用于从运动对象（14）获取数据，特别是胎儿或其一部分说胎儿; 和用于生成所述运动对象（14）的图像的图像生成器（30），其中，所述磁共振成像设备（12）被配置为在所述对象（14）的不同位置处从所述对象（14）利用被摄体（14）的移动来关于磁化方向B 0; 并且其中所述图像生成器（30）被配置为 - 在相应的数据采集期间确定所述对象（14）的位置和/或方位; - 从采集的数据重建相位图像; 以及 - 基于重建的相位图像生成磁化率图。本发明还涉及用于生成对象（14）的图像的对应方法。

10. 发明申请

WO2017100286A2 MAGNETIC STRIPE READING USING MOBILE MAGNETOMETERS 审中-公开
标题翻译：用移动式磁力仪读取磁条
公开(公告)号：WO2017100286A2
公开(公告)日：2017-06-15
申请号：PCT/US2016/065328
申请日：2016-12-07
申请人： EBAY INC.
发明人： GONZALES, Sergio Pinzon Jr.
IPC分类号： G01R33/24 , G07G1/12
CPC分类号： G06K7/084 , G01C17/28 , G01C21/08 , G01R33/0206 , G06F19/00 , G06F19/324 , G06F19/708 , G06K19/06187 , G16H10/60 , G16H10/65
摘要： Technology for reading magnetic information by a mobile device is presented. The mobile device comprises a housing having an integrated surface for swiping a magnetic swipe card and a magnetometer, positioned within the housing, for detecting direction and strength of magnetic fields to read magnetic information from a variety of sources and to produce digital magnetometer output signals. The digital magnetometer output signals represent magnetic information derived from the magnetic swipe card and from the Earth's magnetic fields (or other sources). Each of the digital magnetometer output signals has a magnitude related to the strength of the detected magnetic fields. The mobile device determines at least some of the digital magnetometer output signals representing the magnetic information derived from the magnetic swipe card and/or the Earth's magnetic fields and provides that information to a magnetic card application for processing.
摘要翻译：介绍了用于通过移动设备读取磁信息的技术。该移动设备包括壳体，该壳体具有用于滑动定位在壳体内的磁刷卡和磁力计的集成表面，用于检测磁场的方向和强度以从各种源读取磁信息并产生数字磁强计输出信号。数字磁力仪输出信号代表从磁卡和地球磁场（或其他来源）得到的磁信息。每个数字磁力计输出信号具有与检测到的磁场强度相关的幅度。移动设备确定代表从磁卡和/或地球磁场导出的磁信息的至少一些数字磁力计输出信号，并将该信息提供给磁卡应用以进行处理。

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