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11.发明申请公开(公告)号：US20190369181A1
公开(公告)日：2019-12-05
申请号：US15995059
申请日：2018-05-31
发明人： Shaorong Chang , Zachary Slavens , Dawei Gui
摘要： Various methods and systems are provided for selecting radio frequency coil array comprising a plurality of coil elements for magnetic resonance imaging. In one embodiment, the method includes grouping the plurality of coil elements into receive elements groups (REGs) according to REGs information; generating REG sensitivity maps; determining, for each REG, signal in a region of interest (ROI) and signal in an annefact source region based on the REG sensitivity maps; selecting one or more REGs based on the signal in the ROI and the signal in the annefact source region; and scanning the ROI with the coil elements in the one or more selected REGs being activated and the coil elements not in any selected REGs being deactivated. In this way, annefact artifacts in the reconstructed image may be reduced.
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公开(公告)号：US20190056466A1
公开(公告)日：2019-02-21
申请号：US16167330
申请日：2018-10-22
发明人： Dashen Chu , Scott Allen Lindsay , Dawei Gui , James Hiroshi Akao , Zhu Li
摘要： In one example, an RF coil array includes a first RF coil configured to generate a magnetic field along a first axis, the first RF coil having a first surface, a second RF coil configured to generate a magnetic field along a second axis, orthogonal to the first axis, the second RF coil having a second surface, and a first foldable interconnect coupling the first RF coil to the second RF coil. The first foldable interconnect may be adjusted to couple the first RF coil to the second RF coil with a first amount of overlap and with the first surface and second surface facing a common direction, or couple the first RF coil to the second RF coil with a second amount of overlap, larger than the first amount of overlap, and with the first surface in face to face position with the second surface.
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公开(公告)号：US10054658B2
公开(公告)日：2018-08-21
申请号：US14584272
申请日：2014-12-29
发明人： Dawei Gui , Xiaoli Zhao , Zhenghui Zhang , Hao Shen , Stephen Joseph Garnier
IPC分类号： G01R33/56 , G01R33/565 , G01R33/24
CPC分类号： G01R33/5659 , G01R33/246
摘要： A controller that is operatively connected with a magnet assembly, which defines a target volume; and an image processor, which is configured to obtain calibration data from the controller; map B1 transmit intensity from the magnet assembly to the target volume, based on the calibration data; calculate a B1 transmit shading correction based at least on the map of B1 transmit intensity and on pulse sequence parameters; obtain k-space data of an imaging subject within the target volume from the controller operating the magnet assembly based on the pulse sequence parameters; develop an MR image from the k-space data; and apply the B1 transmit shading correction to the MR image.
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公开(公告)号：US20170343625A1
公开(公告)日：2017-11-30
申请号：US15169183
申请日：2016-05-31
发明人： Dashen Chu , Scott Allen Lindsay , Dawei Gui , James Hiroshi Akao , Zhu Li
CPC分类号： G01R33/34084 , G01R33/30 , G01R33/3415 , G01R33/3614 , G01R33/3621 , G01R33/365 , H01F5/003 , H01F7/20 , H01F7/202 , H03H7/40
摘要： In one example, an RF coil array includes a first RF coil configured to generate a magnetic field along a first axis, the first RF coil having a first surface, a second RF coil configured to generate a magnetic field along a second axis, orthogonal to the first axis, the second RF coil having a second surface, and a first foldable interconnect coupling the first RF coil to the second RF coil. The first foldable interconnect may be adjusted to couple the first RF coil to the second RF coil with a first amount of overlap and with the first surface and second surface facing a common direction, or couple the first RF coil to the second RF coil with a second amount of overlap, larger than the first amount of overlap, and with the first surface in face to face position with the second surface.
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