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1. 发明申请

US20230095957A1 FERROMAGNETIC FRAME FOR MAGNETIC RESONANCE IMAGING 有权
公开(公告)号：US20230095957A1
公开(公告)日：2023-03-30
申请号：US17884078
申请日：2022-08-09
申请人： Hyperfine Operations, Inc.
发明人： Cedric Hugon , Hadrien A. Dyvorne , Michael Stephen Poole
IPC分类号： G01R33/383 , A61B5/055 , G01R33/34 , G01R33/385 , G01R33/3873 , G01R33/44
摘要： An apparatus for providing a B0 magnetic field for a magnetic resonance imaging system. The apparatus includes at least one permanent B0 magnet to contribute a magnetic field to the Bo magnetic field for the MRI system and a ferromagnetic frame configured to capture and direct at least some of the magnetic field generated by the B0 magnet. The ferromagnetic frame includes a first post having a first end and a second end, a first multi-pronged member coupled to the first end, and a second multi-pronged member coupled to the second end, wherein the first and second multi-pronged members support the at least one permanent B0 magnet.

2. 发明申请

US20220373622A1 QUICK COUPLING FOR MOUNTING AN NMR PROBE ON A SHIM SYSTEM 有权
公开(公告)号：US20220373622A1
公开(公告)日：2022-11-24
申请号：US17748198
申请日：2022-05-19
申请人： Bruker Switzerland AG
发明人： Markus MAYER , Franco SESTITO
IPC分类号： G01R33/34 , G01R33/3873
摘要： A fastening device for releasably fastening a probe (1) to an NMR magnet (2). An insert part (3) fastens the probe to a retaining system (4) connected to the magnet. A force-variable connection is established by the insert part with spring elements (8). The probe fastens to the insert part with rigid retaining elements (6). When closed, a connection without mechanical play exists between the insert part and the retaining elements when the spring elements are under tension. An annular disc-shaped pretensioning element (9) is arranged between the insert part and the retaining system. By rotating the pretensioning element relative to the insert part, the pretensioning element presses on and pretensions the spring elements. When open, the spring elements and the retaining elements are configured to connect with a mechanical play of 0.5 to 5 mm between the insert part and the retaining elements when the spring elements are pretensioned.

3. 发明申请

US20220308140A1 Apparatus and Method for Supporting a Shimming of a Magnetic Resonance Apparatus 有权
公开(公告)号：US20220308140A1
公开(公告)日：2022-09-29
申请号：US17705671
申请日：2022-03-28
申请人： Siemens Healthcare GmbH
发明人： Stephan Biber
IPC分类号： G01R33/3875 , G01R33/3873
摘要： A magnetic resonance apparatus may include at least one sensor and a controller. The magnetic resonance apparatus is positionable in an examination room. A spatial location of the magnetic resonance apparatus in the examination room can be determined using the sensor. In a method for supporting an adjustment of a shim parameter of a magnetic resonance apparatus, a current spatial location of the magnetic resonance apparatus in an examination room is determined using the sensor, and a shim parameter of at least one shim element of the magnetic resonance apparatus is determined based on the current spatial location of the magnetic resonance apparatus and information of a magnetic field database. The magnetic field database may include information about a spatial location of the magnetic resonance apparatus and also magnetic field data correlated with the spatial location.

4. 发明申请

US20220291312A1 DEVICE, SYSTEM AND METHOD FOR OBTAINING A MAGNETIC MEASUREMENT WITH PERMANENT MAGNETS 有权
公开(公告)号：US20220291312A1
公开(公告)日：2022-09-15
申请号：US17707375
申请日：2022-03-29
申请人： Aspect Imaging Ltd.
发明人： Uri RAPOPORT , Yair GOLDFARB , Yoram COHEN
IPC分类号： G01R33/383 , H01F7/02 , G01R33/421 , G01R33/3873 , G01R33/565
摘要： A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.

5. 发明申请

US20220171007A1 PASSIVE SHIM TRAY FOR MAGNETIC RESONANCE EXAMINATION SYSTEM 有权
公开(公告)号：US20220171007A1
公开(公告)日：2022-06-02
申请号：US17600616
申请日：2020-04-01
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Peter Forthmann
IPC分类号： G01R33/3873
摘要： A shim tray (10) for a main magnet system of a magnetic resonance examination system comprises a plurality of shim pockets (11), of which an individual shim pocket has side walls (21, 42) forming an open channel (11). Two opposite lateral side walls (21) have insertion profiles (22) to receive an end shim-element (13) at least one open channel's end. Essentially the entire volume of the channel of the shim pocket is available to hold passive shim elements.

6. 发明授权

US11273454B2 Optical detection based on non-linear magnetophoretic transport of magnetic particle for particle and biological sensing and separation 有权
公开(公告)号：US11273454B2
公开(公告)日：2022-03-15
申请号：US15741472
申请日：2016-07-04
申请人： University College Dublin, National University of Ireland, Dublin
发明人： Devrim Kilinc , Peng Li , Gil Lee , Dhruv Ghandi , Stefano Rampini
IPC分类号： G01R33/3873 , B03C1/24 , B03C1/28 , G01N27/74 , G01N33/543
摘要： There is provided system and a separation substrate device for use with an NLM separator in separating and/or detecting at least one target analyte in a sample, the substrate comprising a micromagnet array of a plurality of micromagnets, the micromagnet array comprising a first capture region, a second focusing region, and, a third detection region, the focusing region comprising a converging and/or diverging micromagnet array region. Also provided is a method for separating and detecting at least one target analyte in a sample. The method including: contacting a plurality of magnetic beads with a sample, the magnetic beads functionalized for binding with one or more target analytes in a sample to form aggregates; providing the sample including magnetic beads and aggregates to a separating substrate comprising a micromagnet array of a plurality of micromagnets; transporting the magnetic beads and aggregates relative to the micromagnet array to provide separation and enable detection of the magnetic beads and aggregates; detecting motion of the beads or aggregates of the sample on the array in response to the applied magnetic field and/or detecting beads or aggregates of the sample on the array at a detection region of the array.

7. 发明授权

US11269033B2 Shim irons for a magnetic resonance apparatus 有权
公开(公告)号：US11269033B2
公开(公告)日：2022-03-08
申请号：US17046785
申请日：2019-04-02
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Peter Vernickel , Ingo Schmale , Oliver Lips
IPC分类号： G01R33/3873 , G01R33/38
摘要： The invention relates to a shim iron (130) for use with an magnetic resonance (MR) apparatus (10), wherein the shim iron (130) is comprised of a stack of shim plates (131, 132, 133, 134, 135), wherein at least two of the shim plates (131, 132, 133, 134, 135) comprise slits, the slits forming a respective slit pattern of the slit shim plates (131, 132, 133, 134, 135), and wherein the slit patterns, when viewed from the same viewing direction, are comprised of at least two different slit patterns which may not be brought into congruent coverage with each other. In this way, a shim iron (130) is provided which does not heat up to high temperatures due to eddy currents.

8. 发明申请

US20220018921A1 B0 SHIMMING DEVICE FOR MRI 有权
公开(公告)号：US20220018921A1
公开(公告)日：2022-01-20
申请号：US17390985
申请日：2021-08-01
申请人： ETH Zurich , UNIVERSITAET ZUERICH
发明人： David Brunner , Simon Gross , Klaas Pruessmann
IPC分类号： G01R33/3873 , G01R33/38 , G01R33/54
摘要： A magnetic resonance (MR) apparatus comprises magnet means for generating a main magnetic field in a sample region, encoding means for generating encoding magnetic fields superimposed to the main magnetic field, RF transmitter means for generating MR radiofrequency fields, driver means for operating said encoding means and RF transmitter means to generate superimposed time dependent encoding fields and radiofrequency fields according to an MR sequence for forming images or spectra; and acquisition means for acquiring an MR signal from said object. The magnet means comprise a primary magnetic field source providing a static magnetic field B0 and at least one secondary magnetic field source providing an adjustable magnetic field B′. To provide improved shimming, the secondary magnetic field source comprises at least two spatially distinct portions of a first magnetic material and of a second magnetic material, respectively, said first magnetic material having a first magnetic moment density m1 and said second magnetic material having a second magnetic moment density m2, and means for independently adjusting said second magnetic moment density m2 by variation of an external control parameter.

9. 发明授权

US11193998B2 Permanent magnet arrangement for generating a homogeneous field (“3D Halbach”) 有权
公开(公告)号：US11193998B2
公开(公告)日：2021-12-07
申请号：US16547769
申请日：2019-08-22
申请人： Bruker BioSpin GmbH
发明人： Volker Niemann , Rainer Pietig
IPC分类号： G01R33/383 , H01F7/02 , G01R33/3873 , G01R33/38
摘要： A magnet arrangement (1) in a magnetic resonance apparatus having a permanent magnet system for generating a homogeneous magnetic field in a direction perpendicular to a z-axis in a measurement volume. The magnet system has at least two ring-shaped magnet elements (2) in a ring plane, which are arranged coaxially around the z-axis and are constructed from individual magnet segments (3) arranged next to one another in a Halbach configuration. The magnetization direction of at least two ring-shaped magnet elements deviates from the ring plane such that the component perpendicular to the ring plane varies cosinusoidally with the azimuthal angle of the respective ring-shaped magnet element. The magnetization of in each case two ring-shaped magnet elements is mirror-symmetrical with respect to one another, wherein the mirror plane is the central x-y-plane perpendicular to the z-axis. The disclosed arrangement provides a compact and lightweight permanent magnet arrangement for an MR apparatus.

10. 发明授权

US11156683B2 Static magnetic field adjustment device for magnetic resonance imaging apparatus and superconducting magnet 有权
公开(公告)号：US11156683B2
公开(公告)日：2021-10-26
申请号：US16636683
申请日：2017-10-26
申请人： Mitsubishi Electric Corporation
发明人： Hideki Fukui , Tetsuya Matsuda
IPC分类号： G01R33/3873 , G01R33/3815 , A61B5/055
摘要： A static magnetic field adjustment device for an MRI includes a shim tray, a bottom spacer and a magnetic material shim. The shim tray is mounted on the MRI and provided with a shim pocket. The bottom spacer is made of a non-magnetic material and accommodated in the shim pocket to make contact with a bottom surface of the shim pocket. The magnetic material shim is made of a magnetic material and accommodated in the shim pocket with the bottom spacer interposed between the magnetic material shim and the bottom surface of the shim pocket.

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