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公开(公告)号:US20180017644A1
公开(公告)日:2018-01-18
申请号:US15544162
申请日:2015-02-23
IPC分类号: G01R33/44 , G01R33/38 , G01R33/381 , G01R33/421
CPC分类号: G01R33/443 , G01R33/3802 , G01R33/3804 , G01R33/381 , G01R33/385 , G01R33/421 , G01R33/445
摘要: A magnetic resonance imaging (MRI) system is provided. The system includes a main field magnet generating a main magnetic field B0. Moreover, the system further includes an integrated magnet device. The integrated magnet device has field-shift shield coils and gradient coils. The MRI system further includes a removable insert comprising field-shift shield coils. At least one substrate layer is included in the integrated magnet device to provide mechanical support for the field-shift coils and the gradient coils. Moreover, a cooling mechanism is provided to cool at least some of the magnets.
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公开(公告)号:US20170356971A1
公开(公告)日:2017-12-14
申请号:US15526903
申请日:2014-12-09
申请人: Geron BINDSEIL , Chad Tyler HARRIS
发明人: Geron BINDSEIL , Chad Tyler HARRIS
IPC分类号: G01R33/381 , G01R33/00 , G01R33/385 , G01R33/3875
CPC分类号: G01R33/381 , G01R33/0052 , G01R33/385 , G01R33/3854 , G01R33/3875 , H01F41/04
摘要: A method of manufacturing electromagnet coils for use in a magnetic resonance imaging (MRI) system is provided. The electromagnet coils are located in a non-homogeneous external magnetic field. The method comprises forming a coil representation of a coil surface for the electromagnet coils; setting limits for performance metrics for the electromagnet coils including a magnetic field-shape metric and at least one of an external torque metric and an external force metric, the external torque metric and the external force metric based, respectively, at least in part on a torque and a force exerted on the electromagnet coil by the non-homogeneous external magnetic field; forming a performance functional, based on the coil representation and the performance metrics, for generating a current density pattern over the coil surface; optimizing the performance functional and generating a current density pattern based on the optimized performance functional; and obtaining coil windings.
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3.
公开(公告)号:US20180103890A1
公开(公告)日:2018-04-19
申请号:US15534037
申请日:2015-03-11
CPC分类号: A61B5/414 , A61B5/055 , A61K49/101 , G01R33/445 , G01R33/4806 , G01R33/50 , G01R33/5601
摘要: A magnetic resonance imaging (MRI) system is provided for imaging immune response of soft tissue to therapy by, prior to therapy, administering a contrast agent to the soft tissue; imaging a region of interest using delta relaxation enhanced magnetic resonance (DREMR) to define a functional section; selectively sampling local cells in the functional section; conducting immuno-assay analysis on the sampled local cells; and following therapy, further imaging said region of interest using DREMR to assess immune response of said cells to therapy.
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公开(公告)号:US20170160359A1
公开(公告)日:2017-06-08
申请号:US15321818
申请日:2014-09-15
CPC分类号: G01R33/4625 , A61B5/055 , G01R33/3621 , G01R33/4608 , G01R33/4616 , G01R33/54 , G01R33/565 , H03M1/183
摘要: A method of data acquisition at a magnetic resonance imaging (MRI) system is provided. The system receives at least a portion of raw data for an image, and detects anomalies in the portion of raw data received. When anomalies are detected, the system can correct those anomalies dynamically, without waiting for a new scan to be ordered. The system can attempt to scan the offending portion of the raw data, either upon detection of the anomaly or at some point during the scan. The system can also correct anomalies using digital correction methods based on expected values. The anomalies can be detected based on variations from thresholds, masks and expected values all of which can be obtained using one of the ongoing scan, previously performed scans and apriori information relating to the type of scan being performed.
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公开(公告)号:US20180031654A1
公开(公告)日:2018-02-01
申请号:US15705819
申请日:2017-09-15
CPC分类号: G01R33/4625 , A61B5/055 , G01R33/3621 , G01R33/4608 , G01R33/4616 , G01R33/54 , G01R33/565 , H03M1/183
摘要: A system and method of acquiring an image at a magnetic resonance imaging (MRI) system is provided. Accordingly, an analog signal based on a pulse sequence and a first gain is obtained. The analog signal is converted into a digitized signal. A potential quantization error is detected in the digitized signal based on a boundary. When the detection is affirmative, a replacement analog signal based on the pulse sequence is received. At least one portion of the replacement analog signal can be based on an adjusted gain. The adjusted gain is a factor of the first gain. The replacement analog signal is digitized into a replacement digitized signal. At least one portion of the replacement digitized signal corresponding to the at least one portion of the replacement analog signal is adjusted based on a reversal of the factor.
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公开(公告)号:US20180024211A1
公开(公告)日:2018-01-25
申请号:US15546706
申请日:2015-02-23
申请人: Geron Andre BINDSEIL , Chad Tyler HARRIS , William Bradfield HANDLER , Blaine Alexander CHRONIK
发明人: Geron Andre BINDSEIL , Chad Tyler HARRIS , William Bradfield HANDLER , Blaine Alexander CHRONIK
IPC分类号: G01R33/385
CPC分类号: G01R33/3856 , G01R33/3802 , G01R33/381 , G01R33/385 , G01R33/421 , G01R33/445
摘要: A magnetic resonance imaging (MRI) system is provided. The system includes a main field magnet generating a main magnetic field B0. Moreover, the system further includes an integrated magnet device. The integrated magnet device has field-shift coils including primary field-shift coils and field-shift shield coils, the primary field shift coils being placed closer to an object to be imaged within the imaging volume than the field-shift shield coils. The gradient coils are placed between the primary field-shift coils and field-shift shield coils. At least one substrate layer is included to provide mechanical support for the field-shift coils and the gradient coils.
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公开(公告)号:US20170192076A1
公开(公告)日:2017-07-06
申请号:US15102448
申请日:2015-09-04
申请人: Fergal KERINS , Timotheus Anton GMEINER , Jeff Alan STAINSBY , Chad Tyler HARRIS , Sheryl Rae THINGVOLD , Gregory Allan WHITTON
发明人: Fergal KERINS , Timotheus Anton GMEINER , Jeff Alan STAINSBY , Chad Tyler HARRIS , Sheryl Rae THINGVOLD , Gregory Allan WHITTON
IPC分类号: G01R33/58 , G01R33/563 , G01R33/48
CPC分类号: G01R33/58 , A61B5/055 , G01R33/4806 , G01R33/56341 , G09B23/30
摘要: Disclosed herein are cerebrospinal diffusion phantoms which include a housing having a shape and size configured for insertion into a magnetic resonance coil in one or more preselected poses. A scaffold support structure is mounted on an interior of said housing and a plurality of elongated diffusion mimicking members supported on the support array. The elongated diffusion mimicking members are affixed to the scaffold support structure such that elongated diffusion mimicking members extend in directions needed to substantially emulate a 3 dimensional arrangement of cerebrospinal diffusion fiber tracts in a living organism; as well as modules for elimination of resolution based-bias, angular accuracy evaluation, diffusion rate calibration, and quality assurance image referencing. Each elongated diffusion mimicking member includes an aqueous component which can undergo diffusion along the elongated diffusion mimicking member. The phantom includes a cerebrospinal tissue mimic matrix material contained in the housing enveloping the array of elongated diffusion mimicking members. The housing is made of a material whose magnetic susceptibility substantially matches that of the cerebrospinal mimic matrix material.
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8.
公开(公告)号:US20160313426A1
公开(公告)日:2016-10-27
申请号:US14898545
申请日:2015-04-27
IPC分类号: G01R33/54 , G01R33/483 , G01R33/36 , H01F7/06
CPC分类号: G01R33/381 , G01R33/3664 , G01R33/385 , G01R33/3875 , G01R33/4833 , G01R33/543 , H01F7/064
摘要: A method of configuring a conducting grid of elements interconnected at intersecting nodes by switches is described. The method includes: constructing a background grid by connection of centroids of the cell shape of the conducting grid; identifying a subset of elements in the background grid that intersect the smooth pattern of loops; identifying a subset of elements in the conducting grid that intersect the subset of elements in the background grid; the subset of elements in the conducting grid forming a discretized pattern of loops representing the smooth pattern of loops; for each of the discretized pattern of loops identifying current-in and current-out nodes; altering the on-off state of individual switches in accordance with the discretized pattern of loops; opening the switch between each respective pair of current-in and current out nodes; and applying power to the conducting grid via at least one pair of the input and output current nodes such that the current flow through the elements generates the magnetic field profile.
摘要翻译: 描述了通过交换机在交叉节点处互连的元件的导电栅格的配置方法。 该方法包括:通过连接导电栅格的单元格形状的质心来构建背景网格; 识别背景网格中与循环平滑模式相交的元素的子集; 识别导电网格中与背景网格中的元素子集相交的元素的子集; 导电栅格中的元素的子集形成表示环的平滑图案的环的离散模式; 对于每个离散的模式的环路识别电流输入和电流输出节点; 根据循环的离散模式改变各个开关的开关状态; 在每个相应的一对电流输入和当前输出节点之间打开开关; 以及经由至少一对所述输入和输出电流节点向所述导电栅格施加电力,使得通过所述元件的电流产生所述磁场分布。
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公开(公告)号:US20210080528A1
公开(公告)日:2021-03-18
申请号:US16570892
申请日:2019-09-13
申请人: Geron André BINDSEIL , Ian Robert Oliphant CONNELL , William Bradfield HANDLER , Chad Tyler HARRIS
发明人: Geron André BINDSEIL , Ian Robert Oliphant CONNELL , William Bradfield HANDLER , Chad Tyler HARRIS
IPC分类号: G01R33/385
摘要: A coil apparatus and methods for magnetic resonance imaging involving a wire winding, the wire winding having at least one of: a hollow cross-section wire and a solid cross-section wire, the solid cross-section wire having at least one of: a solid small cross-section wire and a solid large cross-section wire, the solid large cross-section wire having a thickness greater than that of the solid small cross-section wire, and the solid small cross-section wire disposed in one of adjacent and proximate at least one of the hollow cross-section wire and the solid large cross-section wire, whereby at least one of current density, winding density, and heat extraction are increasable.
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10.
公开(公告)号:US20190004137A1
公开(公告)日:2019-01-03
申请号:US15635898
申请日:2017-06-28
IPC分类号: G01R33/565
CPC分类号: G01R33/56509 , G01R33/56316 , G01R33/56341 , G01R33/56572
摘要: The present disclosure provides a method and system for correcting errors caused by non-linearities in a gradient field profile of a gradient coil in a magnetic resonance imaging (MRI) system. The method includes obtaining a non-linearity tensor at each voxel within the imaging space using a computer model of the gradient coil; correcting motion sensitive encoding using the non-linearity tensor; and generating a corrected image using the corrected motion sensitive encoding.
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