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公开(公告)号:US10935615B2
公开(公告)日:2021-03-02
申请号:US16366830
申请日:2019-03-27
发明人: Markus Vester , Peter Speier , Stefan Popescu , Edgar Mueller , Robert Todd Constable , Gigi Galiana
IPC分类号: G01V3/00 , G01R33/38 , G01R33/383
摘要: A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.
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2.
公开(公告)号:US20200309877A1
公开(公告)日:2020-10-01
申请号:US16366830
申请日:2019-03-27
发明人: Markus Vester , Peter Speier , Stefan Popescu , Edgar Mueller , Robert Todd Constable , Gigi Galiana
IPC分类号: G01R33/38 , G01R33/383
摘要: A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.
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公开(公告)号:US10914798B2
公开(公告)日:2021-02-09
申请号:US14038958
申请日:2013-09-27
发明人: Jun Liu , Hui Xue , Marcel Dominik Nickel , Ti-chiun Chang , Mariappan S. Nadar , Alban Lefebvre , Edgar Mueller , Qiu Wang , Zhili Yang , Nirmal Janardhanan , Michael Zenge
摘要: A method for estimating a coil sensitivity map for a magnetic resonance (MR) image includes providing a matrix A of sliding blocks of a 3D image of coil calibration data, calculating a left singular matrix V∥ from a singular value decomposition of A corresponding to τ leading singular values, calculating P=V∥V∥H, calculating a matrix that is an inverse Fourier transform of a zero-padded matrix P, and solving MHcr=(Sr)Hcr for cr, where cr is a vector of coil sensitivity maps for all coils at spatial location r, and M = ( ( 1 1 … 1 0 0 … 0 … … … 0 0 … 0 ) ( 0 0 … 0 1 1 … 1 … … … 0 0 … 0 ) … ( 0 0 … 0 0 0 … 0 … … … 1 1 … 1 ) ) .
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公开(公告)号:US20170124730A1
公开(公告)日:2017-05-04
申请号:US15341195
申请日:2016-11-02
CPC分类号: G06T11/003 , G06F19/00 , G06F19/321 , G06T7/0012 , G06T11/006 , G06T2207/10081 , G06T2207/10088 , G06T2211/428
摘要: The invention concerns a method for reconstructing medical image data which has access to free capacities of at least two computers and manages the use thereof for the purposes of the reconstruction. The method is a particularly reliable alternative to the reconstruction of medical image data based on algorithms that would require a working memory of above-average size.
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5.
公开(公告)号:US20170315200A1
公开(公告)日:2017-11-02
申请号:US15582054
申请日:2017-04-28
发明人: Berthold Kiefer , Lars Lauer , Heiko Meyer , Edgar Mueller , Elmar Rummert , David Grodzki
IPC分类号: G01R33/56 , G01R33/48 , G01R33/565 , G06T11/20
摘要: In a method for displaying quantitative magnetic resonance image data, and a processor, and a magnetic resonance (MR) apparatus that implement such a method, first quantitative MR image data of an examination object are provided to the processor, the first quantitative MR image having been obtained using an MR scanner with a first basic magnetic field strength. The first quantitative magnetic resonance image data are converted in the processor from the first basic magnetic field strength to a second basic magnetic field strength, thereby generating second quantitative MR image data, which are then displayed.
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6.
公开(公告)号:US20190041478A1
公开(公告)日:2019-02-07
申请号:US16051919
申请日:2018-08-01
发明人: David Grodzki , Donald Hardie , Katharina Hesels , Lars Lauer , Edgar Mueller
CPC分类号: G01R33/546 , A61B5/0037 , A61B5/004 , A61B5/055 , A61B2576/02 , G01R33/543 , G01R33/5608 , G06N3/0454 , G06N3/08 , G06N3/126
摘要: In a method and apparatus for determining measurement protocol parameters of a magnetic resonance (MR) image, a first MR image exhibiting first contrast properties, is read into a computer and at least one first contrast ratio is determined in the computer from the first contrast properties. The computer then determines the measurement protocol parameters dependent on the at least one first contrast ratio, in order to generate a second MR image exhibiting second contrast properties such that the second contrast properties approximate, as closely as possible, to the first contrast properties. The measurement protocol parameters are presented as an output from the computer.
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公开(公告)号:US11092658B2
公开(公告)日:2021-08-17
申请号:US16804670
申请日:2020-02-28
发明人: Edgar Mueller , Andreas Greiser , Peter Speier
IPC分类号: G01R33/44 , G01R33/48 , G01R33/561
摘要: In a method for controlling a magnetic resonance imaging system as part of functional magnetic resonance imaging, a main magnetic field B0 is provided having a field strength of at most 1.4 tesla at a main field magnet system (4) of the magnetic resonance imaging system (1); and a measurement is performed as part of functional magnetic resonance imaging, wherein a measurement sequence (MS) is applied that has a longer echo time TE (e.g. longer than 100 ms).
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公开(公告)号:US10768256B2
公开(公告)日:2020-09-08
申请号:US15582054
申请日:2017-04-28
发明人: Berthold Kiefer , Lars Lauer , Heiko Meyer , Edgar Mueller , Elmar Rummert , David Grodzki
IPC分类号: G01R33/56 , G01R33/48 , G01R33/565 , G06T11/20
摘要: In a method for displaying quantitative magnetic resonance image data, and a processor, and a magnetic resonance (MR) apparatus that implement such a method, first quantitative MR image data of an examination object are provided to the processor, the first quantitative MR image having been obtained using an MR scanner with a first basic magnetic field strength. The first quantitative magnetic resonance image data are converted in the processor from the first basic magnetic field strength to a second basic magnetic field strength, thereby generating second quantitative MR image data, which are then displayed.
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9.
公开(公告)号:US20180217215A1
公开(公告)日:2018-08-02
申请号:US15881471
申请日:2018-01-26
发明人: Christoph Forman , Edgar Mueller , Michaela Schmidt , Jens Wetzl
IPC分类号: G01R33/483 , G01R33/44 , G01R33/48 , G01R33/567 , G01R33/561
CPC分类号: G01R33/4833 , G01R33/288 , G01R33/445 , G01R33/482 , G01R33/4822 , G01R33/543 , G01R33/5608 , G01R33/5613 , G01R33/5614 , G01R33/56325 , G01R33/567
摘要: In a method and magnetic resonance apparatus for recording diagnostic measurement data of a heart of an examination object, the magnetic resonance apparatus is operated by a control sequence wherein an RF pulse excites nuclear spins with a flip angle of at least 60°, the diagnostic measurement data are recorded in a coordinate system independent of the heart, and the basic magnetic field produced by the magnetic resonance apparatus is smaller than 1.0 tesla.
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10.
公开(公告)号:US20200275858A1
公开(公告)日:2020-09-03
申请号:US16804670
申请日:2020-02-28
发明人: Edgar Mueller , Andreas Greiser , Peter Speier
IPC分类号: A61B5/055 , G01R33/561 , G01R33/44
摘要: In a method for controlling a magnetic resonance imaging system as part of functional magnetic resonance imaging, a main magnetic field B0 is provided having a field strength of at most 1.4 tesla at a main field magnet system (4) of the magnetic resonance imaging system (1); and a measurement is performed as part of functional magnetic resonance imaging, wherein a measurement sequence (MS) is applied that has a longer echo time TE (e.g. longer than 100 ms).
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