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公开(公告)号：US20190219648A1
公开(公告)日：2019-07-18
申请号：US16329606
申请日：2017-08-30
发明人： Weili Lin , Shumin Wang
IPC分类号： G01R33/34 , G01R33/3415 , G01R33/36
CPC分类号： G01R33/34046 , G01R33/34084 , G01R33/3415 , G01R33/365 , G01R33/3657
摘要： This specification describes RF coils using an elastic substrate that can be stretched and/or wrapped around the target anatomy. In some examples, a system includes an RF coil array including at least one elastic and conductive loop, the elastic and conductive loop having a length and being elastic in that, in response to a stress, the length stretches from a first length to a second length greater than the first length and returns to the first length after removal of the stress. The elastic and conductive loop is configurable to surround at least a portion of a magnetic resonance imaging subject's body for magnetic resonance imaging of the portion of the subject's body. The system includes an RF circuit coupled to the RF coil array and configured to cause a voltage to be induced through the elastic and conductive loop.
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公开(公告)号：US20190011513A1
公开(公告)日：2019-01-10
申请号：US16130712
申请日：2018-09-13
发明人： Michael Stephen Poole , Cedric Hugon , Hadrien A. Dyvorne , Laura Sacolick , William J. Mileski , Jeremy Christopher Jordan , Alan B. Katze, JR. , Jonathan M. Rothberg , Todd Rearick , Christopher Thomas McNulty
IPC分类号： G01R33/385 , G01R33/383 , G01R33/389 , A61B50/13 , A61B90/00
CPC分类号： G01R33/3852 , A61B5/0555 , A61B6/4405 , A61B50/13 , A61B90/00 , A61B2560/0431 , A61G13/104 , G01R33/34092 , G01R33/3642 , G01R33/3657 , G01R33/38 , G01R33/3802 , G01R33/3806 , G01R33/383 , G01R33/385 , G01R33/3854 , G01R33/3873 , G01R33/389 , G01R33/4215 , G01R33/422 , G01R33/445 , G01R33/48 , G01R33/5608
摘要： According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, the magnetics system comprising, a B0 magnet configured to produce a B0 field for the magnetic resonance imaging system at a low-field strength of less than 0.2 Tesla (T), a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of magnetic resonance signals, and at least one radio frequency coil configured to, when operated, transmit radio frequency signals to a field of view of the magnetic resonance imaging system and to respond to magnetic resonance signals emitted from the field of view, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the magnetic resonance imaging system. According to some aspects, the power system operates the low-field magnetic resonance imaging system using an average of less than 1.6 kilowatts during image acquisition.
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公开(公告)号：US20180284203A1
公开(公告)日：2018-10-04
申请号：US15941201
申请日：2018-03-30
发明人： Hou Quan Lin , Ying Lun Wang , Wen Ming Li , JianMin Wang , Juergen Nistler
CPC分类号： G01R33/3628 , G01R33/34076 , G01R33/3657 , H03H1/0007
摘要： A tuning/detuning structure and a detuning method for an RF coil use an RF power source, a first impedance circuit, a first RF line, and a first port having a first guide leg end and a first input end, with the first guide leg end being connected to a first end ring capacitance of the RF coil. When the RF coil needs to be detuned, the first input end is connected to the first impedance circuit via the first RF line. When the RF coil needs to transmit an RF pulse signal, the first input end is connected to the RF power source via the first RF line. The need for a switch element is thereby reduced as is harm resulting from breakdown of such a switch element. An impedance circuit can be combined with a switch element to realize detuning jointly, and a good detuning effect can be achieved by a small number of switch elements.
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公开(公告)号：US20180263561A1
公开(公告)日：2018-09-20
申请号：US15895435
申请日：2018-02-13
申请人： ScanMed, LLC
发明人： RANDALL W. JONES
CPC分类号： A61B5/6804 , A61B5/055 , A61B5/6823 , A61B5/6831 , G01R33/34 , G01R33/34007 , G01R33/34084 , G01R33/3415 , G01R33/3657
摘要： An MRI antenna array including a housing and a substrate, antenna elements and circuitry encapsulated by the housing. The housing, antenna elements, and substrate are flexible to allow the housing to distort in three dimensions to closely conform to contours of a patient. The antenna elements may be formed from a flat weave mesh conductor. The flat weave mesh conductor allows the MRI antenna array to conform to the contours of a patient to provide three dimensional movement of the array. The flat weave mesh conduct has increased durability over a tight weave mesh of an elongate hollow cylinder conductor, allowing the flat weave mesh conductor to withstand additional flexing cycles.
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公开(公告)号：US20180156878A1
公开(公告)日：2018-06-07
申请号：US15829085
申请日：2017-12-01
发明人： Ali Caglar Ozen , Michael Bock
IPC分类号： G01R33/36 , G01R33/561
CPC分类号： G01R33/3621 , G01R33/3657 , G01R33/4641 , G01R33/4816 , G01R33/561
摘要： A method for the magnetic resonance examination of a measurement object is described, in which a measurement sequence is used in which the magnetic resonance response to the transmitted signal during transmission is measured. It is provided that a correction signal corresponding to the transmitted signal be generated and be used for correction of the response signal. To this end, the correction signal is modulated by a phase value and an amplitude value. The phase value and the amplitude value are automatically and iteratively customized for optimum correction of the response signal by an optimization method using a respective present state value of the measurement signal. Further, a radio-frequency unit (1) is described that can be used to carry out the method according to the invention.
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6.发明申请公开(公告)号：US20180149719A1
公开(公告)日：2018-05-31
申请号：US15838888
申请日：2017-12-12
申请人： Duke University
发明人： Hui Han , Trong-Kha Truong , Allen W. Song
IPC分类号： G01R33/36 , G01R33/3875
CPC分类号： G01R33/3642 , G01R33/341 , G01R33/3453 , G01R33/3628 , G01R33/3635 , G01R33/3657 , G01R33/3875 , G01R33/5659
摘要： Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES). Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current can flow in the same coil simultaneously but independently with no electromagnetic interference between the two modes. This invention is not only applicable when the same coil array is used for parallel transmit, receive and shim, but also when two separate coil arrays are used. In that case, the B0 shimming capability can be integrated into one of the coil arrays (i.e. a transmit array with B1 shimming capability or a receive array), thereby increasing the flexibility and practical utility of the iPRES technology.
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公开(公告)号：US20180081008A1
公开(公告)日：2018-03-22
申请号：US15706005
申请日：2017-09-15
发明人： Xiaoyu Yang , Haoqin Zhu , Tsinghua Zheng
IPC分类号： G01R33/36 , A61B5/00 , G01R33/34 , G01R33/3415 , G01R33/48
CPC分类号： G01R33/3657 , A61B5/0035 , A61B5/055 , A61B5/6814 , A61B5/6822 , A61B5/6823 , A61B2576/00 , G01R33/288 , G01R33/34046 , G01R33/34076 , G01R33/3415 , G01R33/48
摘要： Methods and other embodiments control a member of a plurality of MRI transmit (Tx)/receive (Rx) coil array elements to operate in a resonant Tx mode or in a non-resonant Tx mode. The member of the plurality of MRI Tx/Rx coil array elements, upon resonating with a primary coil at a working frequency, generates a local amplified Tx field based on an induced current in the member of the plurality of MRI Tx/Rx coil array elements. The member of the plurality of MRI Tx/Rx coil array elements includes at least one magnitude/phase control circuit connected in parallel. Upon detecting that the member of the plurality of MRI Tx/Rx coil array elements is operating in resonant Tx mode, embodiments randomly control a member of the at least one magnitude/phase control circuit to vary the magnitude or phase of the local amplified Tx field over a range of magnitudes or phases.
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公开(公告)号：US20180081007A1
公开(公告)日：2018-03-22
申请号：US15268277
申请日：2016-09-16
CPC分类号： G01R33/3657 , G01R33/34007 , G01R33/341 , G01R33/3685
摘要： Various methods and systems are provided for a disconnecting a receive coil from a transmit coil of a magnetic resonance (MR) imaging apparatus during a transmit operation. In one example, a device may include a first device and a second device, each having a first terminal and a second terminal operably coupling different terminals of a radio frequency (RF) coil with one or more data acquisition elements, each device including a pair of switches. In this way, by simultaneously operating each of switches of the devices, the receive coil may be isolated from a transmit RF coil during transmit operation.
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9.发明申请公开(公告)号：US20180067045A1
公开(公告)日：2018-03-08
申请号：US15812473
申请日：2017-11-14
发明人： Solyman ASHRAFI , Roger LINQUIST
IPC分类号： G01N21/59 , A61B5/1455 , A61B5/145 , G01N21/17 , G01N21/21 , G01N33/483 , G01N33/487
CPC分类号： G01N21/59 , A61B5/14532 , A61B5/1455 , G01N21/17 , G01N21/21 , G01N24/00 , G01N24/08 , G01N33/483 , G01N33/4833 , G01N33/487 , G01N2021/1765 , G01R33/3657 , G01R33/3692
摘要： An apparatus that detects a material within a sample includes signal generation circuitry that generates a first light beam having at least one fractional orbital angular momentum applied thereto and applies the first light beam to the sample. The at least one fractional orbital angular momentum imparts a phase factor to the first light beam. The orbital angular momentum generation circuitry includes a spiral phase plate having fraction step height to impart the at least one angular momentum to the first light beam. A detector receives the first light beam after the first light beam passes through the sample and detects the material responsive to a detection of a predetermined phase factor within the first light beam received from the sample.
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10.发明授权公开(公告)号：US09897671B2
公开(公告)日：2018-02-20
申请号：US13605928
申请日：2012-09-06
申请人： Jan Bollenbeck , Klaus Porzelt , Wilfried Schnell
发明人： Jan Bollenbeck , Klaus Porzelt , Wilfried Schnell
IPC分类号： G01R33/3415 , G01R33/36
CPC分类号： G01R33/3664 , G01R33/3415 , G01R33/3657
摘要： A detuning apparatus for a receive coil for a magnetic resonance device includes a number of coil elements. The coil elements may be selectively connected to a receive channel of a data processing apparatus by way of a switching apparatus. Each of the coil elements includes at least one detuning assembly such as, for example, a PIN diode that may be switched between a detuning state and a receive state by way of a continuous switching signal. A controller is provided to switch the switching apparatus and to generate the switching signals. The detuning apparatus has first diplexers connected upstream of the switching apparatus for injecting switching signals for switching the detuning assembly for coil elements to be detuned dynamically. The detuning apparatus also includes detuning modules for each of the coil elements to switch the detuning assembly to the detuning state if there is no switching signal present.
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