公开(公告)号：EP1229340A3

公开(公告)日：2005-01-05

申请号：EP01127522.9

申请日：2001-11-17

申请人： Bruker BioSpin AG

发明人： Bovier, Pierre-Alain ,  Schauwecker, Robert ,  Amann, Andreas ,  Eckert, Daniel M.

IPC分类号： G01R33/387

CPC分类号： G01R33/3873

摘要： Eine Magnetanordnung mit einem supraleitenden Magnetspulensystem ( C ) zur Erzeugung eines Magnetfeldes in Richtung einer z-Achse in einem auf der z-Achse um z = 0 angeordneten Arbeitsvolumen ( AV ), wobei das Feld des Magnetspulensystems ( C ) im Arbeitsvolumen ( AV ) mindestens einen inhomogenen Anteil H n · z n mit n ≥ 2 aufweist, dessen Beitrag zur Gesamtfeldstärke auf der z -Achse um z = 0 mit der n -ten Potenz von z variiert, und wobei eine bezüglich der z -Achse weitgehend zylindersymmetrische Feldformvorrichtung ( P ) aus magnetischem Material vorgesehen ist, zeichnet sich dadurch aus, dass das Magnetspulensystem ( C ) zum Einsatz in einer Apparatur für hochauflösende magnetische Resonanzspektroskopie vorgesehen ist und dass die Feldformvorrichtung ( P ) mindestens teilweise einen radialen Abstand von der z-Achse von weniger als 80 Millimetern besitzt und mindestens einen der inhomogenen Feldanteile H n ·z n des Magnetspulensystems ( C ) zu mindestens fünfzig Prozent kompensiert, und dass mindestens ein zusätzliches Spulensystem ( S ) vorgesehen ist, welches in der Magnetanordnung als Shim-Vorrichtung wirkt. Damit lässt sich eine Feldformvorrichtung aus magnetischem Material mit geeigneter Geometrie derart verwirklichen, dass im Magnetspulensystem auf mindestens einen Teil der Notchstrukturen zur Feldhomogenisierung verzichtet werden kann.

公开(公告)号：EP1118256A4

公开(公告)日：2003-03-12

申请号：EP00908074

申请日：2000-02-24

申请人： LEE MOON HO ,  BAE SEONG HO

发明人： LEE MOON HO ,  BAE SEONG HO

IPC分类号： H05K9/00 ,  G01R33/387 ,  G01R33/44 ,  A61N1/16 ,  H01F3/10

CPC分类号： G01R33/387

摘要： A space defining structure for magnetic homogenization is disclosed. The space defining structure of this invention is specifically designed to homogenize the magnetic field within its interior space, thus minimizing a malfunctioning or damage of electronic equipment or ill-effect on living matters within houses and buildings due to a localized geomagnetic disturbance. Such a localized geomagnetic disturbance may be generated by a variety of magnetic structures, such as the interior structures of the earth's crust, for example, stratum structures, underground water and water veins, a variety of magnetic materials, a variety of electronic devices or the reinforcing bars of the houses or buildings. The space defining structure for magnetic homogenization of this invention consists of a magnetic field focusing member 1 forming the bottom wall of the space structure. The space defining structure also has at least one magnetic field dispersing member 2 extending from the magnetic field focusing member 1 while defming the desired interior space of the structure in cooperation with the magnetic field focusing member 1.

摘要翻译： 公开了一种用于磁均匀化的空间限定结构。 本发明的空间限定结构专门设计用于使其内部空间内的磁场均匀化，从而使电子设备的故障或损坏最小化，或者由于局部地磁干扰而使房屋和建筑物内的生活物体受到不良影响。 这样的局部地磁干扰可以由各种磁性结构产生，例如地壳的内部结构，例如地层结构，地下水和水脉，各种磁性材料，各种电子设备或 房屋或建筑物的钢筋。 本发明的用于磁均匀化的空间限定结构包括形成空间结构底壁的磁场聚焦元件（1）。 空间限定结构还具有至少一个从磁场聚焦元件（1）延伸的磁场分散元件（2），同时与磁场聚焦元件（1）一起限定结构的期望内部空间。

公开(公告)号：EP0982598A3

公开(公告)日：2002-02-13

申请号：EP99306173.8

申请日：1999-08-03

申请人： Marconi Medical Systems, Inc.

发明人： McGinley, John V. M. ,  Young, Ian R. ,  Demeester, Gordon D. ,  Kinanen, Ilmari

IPC分类号： G01R33/38 ,  G01R33/387

CPC分类号： G01R33/383 ,  G01R33/3873

摘要： A pair of annular magnets (10) generate a vertical magnetic flux field through an imaging volume (12) . The flux is focussed by a pair of Rose rings (26) of high cobalt steel. A high order shim set includes a plurality of permanently magnetized or magnetized iron rings (32a, 32b, 32c, 32d) which cooperatively interact with the magnet assembly to optimize the homogeneity of the magnetic flux through the imaging volume. One of the permanent magnetic rings (32d) , is mounted with an opposite polarity relative to the others. The magnetized rings are mounted in a non-ferrous, electrically insulating support structure (34) such that gradient coils (50) can be positioned behind the permanent magnet rings. A flux return path (14, 16, 18, 20, 22, 24) provides a low flux resistant path from adjacent the Rose ring at one side of the imaging volume remotely around the imaging volume to a position adjacent the Rose ring at the other side of the imaging volume.

公开(公告)号：EP0120927A4

公开(公告)日：1986-07-08

申请号：EP83903331

申请日：1983-09-23

申请人： NEW ENGLAND NUCLEAR CORP

发明人： LEE DENNY L Y ,  HAY ROBERT DUNCAN

IPC分类号： G01R33/48 ,  A61B5/055 ,  G01R33/383 ,  G01R33/387 ,  H01F7/02 ,  G01R33/08

CPC分类号： G01R33/383 ,  Y10S505/844

摘要： An NMR imaging apparatus (10) having a desired imaging volume for imaging of biological tissue, said apparatus comprising bias means (20) for generating a bias field, means for generating gradient fields, and radio frequency means for applying a pulse of electromagnetic radiation to the biological tissue and for detecting the resultant signals emitted from said tissue; wherein said bias means comprises a plurality of dipole ring magnets, (20) each dipole ring magnet comprising a plurality of segments, (22) each segment comprising an oriented, anisotropic permanent magnet material (23) arranged in a ring so that there is a substantially continuous ring of permanent magnet material; wherein the inner radius of at least one dipole ring magnet is different from the inner radius of an adjacent dipole ring magnet.

公开(公告)号：EP4095538A1

公开(公告)日：2022-11-30

申请号：EP21176101.0

申请日：2021-05-26

申请人： Skope Magnetic Resonance Technologies AG

发明人： BRUNNER, David ,  GROSS, Simon

IPC分类号： G01R33/24 ,  G01R33/07 ,  G01R33/387 ,  G01R33/389 ,  G01R33/565 ,  G01R33/58 ,  G01R33/02

摘要： A magnetic resonance (MR) assembly (2) comprising a main magnetic field magnet providing a main magnetic field (B 0 ) along a main field axis (A) within a volume of interest (4), gradient coils (6) for generating gradient magnetic fields superimposed onto the main magnetic field according to an MR acquisition sequence or MR service sequence, a plurality of magnetic field probes (8, 8a, 8b, 8c, 8d; 10, 10a, 10b, 10c), each positioned within said volume of interest, each magnetic field probe generating a probe signal, and a controller (12) connected to each field probe for receiving and processing respective probe signals. To improve and extend the assembly's operation, said plurality of magnetic field probes comprises a plurality of at least three MR probes (8, 8a, 8b, 8c, 8d), each one of said MR probes comprising an MR active substance (14), means (18, 20, 22) for pulsed MR excitation of said substance and means (18, 20, 22) for receiving from said substance an MR probe signal indicative of a local magnetic field magnitude, and at least one Hall probe (10, 10a, 10b, 10c), each one of said Hall probes comprising a Hall element (26) having a respective Hall axis (H), means (28) for generating an electric current within said Hall element and means (30) for receiving a Hall probe signal indicative of a local magnetic field vector component along said Hall axis.

公开(公告)号：EP3906420A1

公开(公告)日：2021-11-10

申请号：EP21703847.0

申请日：2021-01-29

申请人： Bruker Switzerland AG

发明人： SCHMIDIG, Daniel

IPC分类号： G01R33/30 ,  G01R33/387

公开(公告)号：EP3657194B1

公开(公告)日：2021-07-28

申请号：EP19209473.8

申请日：2019-11-15

发明人： Pietig, Rainer ,  Niemann, Volker ,  Hänichen, Lukas

IPC分类号： G01R33/383 ,  G01R33/387 ,  H01F7/02

公开(公告)号：EP3797307A1

公开(公告)日：2021-03-31

申请号：EP19806847.0

申请日：2019-05-20

申请人： Hyperfine Research, Inc.

发明人： POOLE, Michael, Stephen ,  HUGON, Cedric ,  MCNULTY, Christopher, Thomas

IPC分类号： G01R33/20 ,  G01R33/28 ,  G01R33/34 ,  G01R33/38 ,  G01R33/383 ,  G01R33/387 ,  G01R33/3873 ,  G01R33/44 ,  G01R33/48 ,  H01F7/02

公开(公告)号：EP2977001A4

公开(公告)日：2017-05-24

申请号：EP13879127

申请日：2013-11-28

申请人： JIANGSU MAGSPIN INSTR CO LTD

发明人： ZHAO HUAWEI

IPC分类号： G01R33/385 ,  A61B5/055 ,  G01R33/28 ,  G01R33/387 ,  G01R33/48

CPC分类号： G01R33/30 ,  A61B5/055 ,  A61B5/0555 ,  G01R33/288 ,  G01R33/34007 ,  G01R33/34046 ,  G01R33/385 ,  G01R33/3854 ,  G01R33/3858 ,  G01R33/387 ,  G01R33/3875

公开(公告)号：EP3068298A2

公开(公告)日：2016-09-21

申请号：EP14861500.8

申请日：2014-11-14

申请人： New York University

发明人： CLOOS, Martijn Anton Hendrik

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/387

CPC分类号： G01R33/5612 ,  A61B5/055 ,  G01R33/246 ,  G01R33/4828 ,  G01R33/4835 ,  G01R33/50 ,  G01R33/5602 ,  G01R33/5608 ,  G01R33/56545

摘要： A general framework is for signal encoding in MRF that enables simultaneous transmit and receive encoding to accelerate the acquistion process, or improve the fidelity of the final image/parameter-map per unit scan time. The proposed method and systems capitalize on the distinct spatial variations in the sensitivity profile of each transmit-coil to reduce the acquistion time, and/or improve the fidelity of the final parameter-map per unit time.

摘要翻译： 一般的框架是用于MRF中的信号编码，其能够同时发送和接收编码以加速采集过程，或者提高每单位扫描时间的最终图像/参数图的保真度。 所提出的方法和系统利用每个发射线圈的灵敏度分布中的不同的空间变化来减少采集时间，和/或提高每单位时间的最终参数图的保真度。