-
公开(公告)号：US11592504B2
公开(公告)日：2023-02-28
申请号：US17202793
申请日：2021-03-16
IPC分类号： G01R33/34 , G01R33/483 , G01R33/422
摘要： Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil. The MRI RF coil comprises a first conductive ring and a second conductive ring. A plurality of rung groups extend between the first and second conductive rings. The plurality of rung groups are spaced uniformly about the first conductive ring. Each of the plurality of rung groups comprises a plurality of conductive rungs extending between and connected to the first and second conductive rings. The plurality of conductive rungs of each of the plurality of rung groups are azimuthally separated from one another by a first azimuth angle. Each of the plurality of rung groups is separated from a neighboring rung group by a spacing that forms a window. Each of the windows have a second azimuth angle that is greater than the first azimuth angle.
-
公开(公告)号：US11156682B2
公开(公告)日：2021-10-26
申请号：US15933860
申请日：2018-03-23
发明人： Xiaoyu Yang , Tsinghua Zheng , Haoqin Zhu
IPC分类号： G01R33/36 , G01R33/341 , G01R33/34 , G01R33/3415
摘要： A magnetic resonance imaging (MRI) radio frequency (RF) coil array configured to operate in a transmit (Tx) mode or in a receive (Rx) mode, comprising: a plurality of rows configured in an anatomy-specific shape, a row including a plurality of RF coil elements, an RF coil element including an LC coil and a magnitude/phase control component, where the LC coil, upon resonating with a primary coil at the working frequency of the primary coil, generates a local amplified Tx field based on an induced current in the LC coil, where a magnitude or a phase of the induced current is independently adjustable, where the magnitude/phase control component is configured to adjust the magnitude or phase of the induced current, and where the magnitude or phase of the induced current of a first RF coil element is independently adjustable from that of a second, different RF coil element.
-
公开(公告)号：US20210318398A1
公开(公告)日：2021-10-14
申请号：US17202864
申请日：2021-03-16
发明人： Xiaoyu Yang , Mathew Finnerty , Tsinghua Zheng
摘要： Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil array configured to operate in at least one of a transmit mode or a receive mode on a cylindrical former. The MRI RF coil array includes at first row of RF coil elements. Each row of RF coil elements includes at least three RF coil elements that circumferentially surround a cylindrical axis. The MRI RF coil array also includes a first birdcage coil that circumferentially surrounds the first row of RF coil elements. Each RF coil element of the first row is configured to inductively couple to the first birdcage coil and to each other RF coil elements. The first birdcage coil has an impedance configured to negate inductive coupling between the RF coil elements of the first row.
-
公开(公告)号：US20210302514A1
公开(公告)日：2021-09-30
申请号：US17202793
申请日：2021-03-16
IPC分类号： G01R33/34 , G01R33/422 , G01R33/483
摘要： Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil. The MRI RF coil comprises a first conductive ring and a second conductive ring. A plurality of rung groups extend between the first and second conductive rings. The plurality of rung groups are spaced uniformly about the first conductive ring. Each of the plurality of rung groups comprises a plurality of conductive rungs extending between and connected to the first and second conductive rings. The plurality of conductive rungs of each of the plurality of rung groups are azimuthally separated from one another by a first azimuth angle. Each of the plurality of rung groups is separated from a neighboring rung group by a spacing that forms a window. Each of the windows have a second azimuth angle that is greater than the first azimuth angle.
-
公开(公告)号：US20210072330A1
公开(公告)日：2021-03-11
申请号：US17012873
申请日：2020-09-04
IPC分类号： G01R33/34 , G01R33/36 , G01R33/30 , G01R33/341
摘要： A system for positioning of an RF surface coil to several imaging tables has a table coupling device with first and second sides and table engagement features. The first side has a planar surface to mate with a first imaging table. The second side has a contoured surface having a curvature to mate with a second imaging table. A coil coupling device selectively couples to each of the first and second sides of the table coupling device in respective first and second configurations. The coil coupling device selectively rotates about a rotation axis perpendicular to the first side, and selectively translates along a translation axis perpendicular to the rotation axis. The coil coupling device has one or more coil engagement features to selectively engage the RF surface coil in each of a horizontal position and vertical position of the RF surface coil with respect to the table coupling device.
-
公开(公告)号：US10386430B2
公开(公告)日：2019-08-20
申请号：US15583345
申请日：2017-05-01
发明人： Xiaoyu Yang , Haoqin Zhu , Tsinghua Zheng
IPC分类号： G01V3/00 , G01R33/36 , G01R33/34 , G01R33/28 , G01R33/341 , G01R33/3415
摘要： A magnetic resonance imaging (MRI) radio frequency (RF) coil array configured to operate in a transmit (Tx) mode or in a receive (Rx) mode, the MRI RF coil array comprising at least one single-layer RF coil element. The at least one RF coil element includes a resonant LC coil, a matching Tx/Rx switch circuit, and a preamplifier. The matching and Tx/Rx switch circuit, when operating in Tx mode, electrically isolates the LC coil from the preamplifier upon the LC coil resonating with a primary coil at the primary coil's working frequency. The LC coil, upon resonating with the primary coil at the working frequency, generates a local amplified Tx field based on an induced current in the LC coil. A magnitude or a phase of the induced current is independently adjustable. The matching and Tx/Rx switch circuit, when in Rx mode, electrically connects the LC coil with the preamplifier.
-
7.发明授权Failsafe protection from induced RF current for MRI RF coil assembly having transmit functionality 有权对具有发射功能的MRI RF线圈组件的感应RF电流的故障保护保护公开(公告)号：US09157972B2
公开(公告)日：2015-10-13
申请号：US13586122
申请日：2012-08-15
CPC分类号： G01R33/3664 , G01R33/3628 , G01R33/3642 , G01R33/365 , G01R33/543
摘要： An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
摘要翻译： 在MRI发射和接收RF线圈组件中包括电控故障安全开关，以便在与MRI系统断开连接的情况下保护其免受感应RF电流的影响，但在成像期间无意中与强MRI射频场相关联 使用其他RF线圈的程序。
-
公开(公告)号：US11442125B2
公开(公告)日：2022-09-13
申请号：US17028318
申请日：2020-09-22
发明人： Xiaoyu Yang , Thomas Eastlake , Tsinghua Zheng
IPC分类号： G01R33/34 , G01R33/36 , G01R33/385 , G01R33/422
摘要： Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil configured to operate in at least one of a transmit mode or a receive mode. A first birdcage coil includes a pair of first-birdcage end rings and at least four first-birdcage rungs circumferentially arranged along the first-birdcage end rings. A second birdcage coil including a pair of second-birdcage end rings and at least four second-birdcage rungs circumferentially arranged along the second-birdcage end rings. The first and second birdcage coils neighbor and are spaced by a first non-zero distance along an axis. The axis is surrounded by the first-birdcage end rings and the second-birdcage end rings, and the first non-zero distance is greater than individual lengths of the first and second birdcage coils along the axis.
-
公开(公告)号：US20220091203A1
公开(公告)日：2022-03-24
申请号：US17028318
申请日：2020-09-22
发明人： Xiaoyu Yang , Thomas Eastlake , Tsinghua Zheng
IPC分类号： G01R33/34 , G01R33/422 , G01R33/36 , G01R33/385
摘要： Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil configured to operate in at least one of a transmit mode or a receive mode. A first birdcage coil includes a pair of first-birdcage end rings and at least four first-birdcage rungs circumferentially arranged along the first-birdcage end rings. A second birdcage coil including a pair of second-birdcage end rings and at least four second-birdcage rungs circumferentially arranged along the second-birdcage end rings. The first and second birdcage coils neighbor and are spaced by a first non-zero distance along an axis. The axis is surrounded by the first-birdcage end rings and the second-birdcage end rings, and the first non-zero distance is greater than individual lengths of the first and second birdcage coils along the axis.
-
10.发明授权公开(公告)号：US11269031B2
公开(公告)日：2022-03-08
申请号：US16707013
申请日：2019-12-09
发明人： Xiaoyu Yang
IPC分类号： G01R33/36
摘要： Embodiments relate to MRI coils and arrays comprising an all-in-one circuit that can perform all the functions of decoupling, balun, tuning, and preamplifier decoupling. One example embodiment is a magnetic resonance imaging (MRI) radio frequency (RF) coil element, comprising: a coil comprising at least one inductor, at least one capacitor, and two connection points; a lattice balun comprising two inputs and two outputs, wherein the two inputs of the lattice balun are connected across the two connection points of the coil; one or more shunt reactive elements connected across the two outputs of the lattice balun, wherein the one or more shunt reactive elements comprises at least one of one or more shunt capacitors or one or more shunt inductors; one or more protection diodes in parallel with the one or more shunt reactive elements; and a low input impedance preamplifier in parallel with the one or more protection diodes.
-
-
-
-
-
-
-
-
-
搜索结果
43 条记录 (耗时 0.017 秒)