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1. 发明授权

US10254360B2 Router and coil array for ultra high field MRI 有权
公开(公告)号：US10254360B2
公开(公告)日：2019-04-09
申请号：US13808279
申请日：2011-07-04
申请人： Michael A. Morich , Zhiyong Zhai , Eddy Y. Wong , Kevin Nieman , Nabeel M. Malik
发明人： Michael A. Morich , Zhiyong Zhai , Eddy Y. Wong , Kevin Nieman , Nabeel M. Malik
IPC分类号： G01R33/36 , G01R33/3415 , G01R33/561
摘要： A router (60), for use with magnetic resonance systems (10), selectively routes unique excitation signals, generated by a multi-channel radio-frequency (RF) amplifier, over transmission lines (Tx) to any one of a plurality of connection panels (66) which each accepts at least one RF coil assembly having multiple coil elements (20). Each connection panel (66) includes transceiver ports (68) for connecting at least one conductor (22,24) of the coil elements (20) to a corresponding transceiver channel (T/R). The router (60) selectively routes magnetic resonance signals received by the conductors (22,24) from the transceiver channels (T/R) to a multi-channel RF receiver (41). The coin elements may carry sine-mode currents or uniform currents.

2. 发明申请

US20130106416A1 ROUTER AND COIL ARRAY FOR ULTRA HIGH FIELD MRI 审中-公开
标题翻译：用于超声场MRI的路由器和线圈阵列
公开(公告)号：US20130106416A1
公开(公告)日：2013-05-02
申请号：US13808279
申请日：2011-07-04
申请人： Michael A. Morich , Zhiyong Zhai , Eddy Y. Wong , Kevin Nieman , Nabeel M. Malik
发明人： Michael A. Morich , Zhiyong Zhai , Eddy Y. Wong , Kevin Nieman , Nabeel M. Malik
IPC分类号： G01R33/36
CPC分类号： G01R33/3642 , G01R33/3415 , G01R33/3607 , G01R33/3621 , G01R33/3678 , G01R33/5612
摘要： A router (60), for use with magnetic resonance systems (10), selectively routes unique excitation signals, generated by a multi-channel radio-frequency (RF) amplifier, over transmission lines (Tx) to any one of a plurality of connection panels (66) which each accepts at least one RF coil assembly having multiple coil elements (20). Each connection panel (66) includes transceiver ports (68) for connecting at least one conductor (22,24) of the coil elements (20) to a corresponding transceiver channel (T/R). The router (60) selectively routes magnetic resonance signals received by the conductors (22,24) from the transceiver channels (T/R) to a multi-channel RF receiver (41). The coin elements may carry sine-mode currents or uniform currents.
摘要翻译：与磁共振系统（10）一起使用的路由器（60）选择性地将由多通道射频（RF）放大器产生的唯一激励信号通过传输线（Tx）路由到多个连接中的任何一个每个接收至少一个具有多个线圈元件（20）的RF线圈组件的面板（66）。每个连接面板（66）包括用于将线圈元件（20）的至少一个导体（22,24）连接到对应的收发器通道（T / R）的收发器端口（68）。路由器（60）选择性地将由导体（22,24）接收的磁共振信号从收发器通道（T / R）传送到多声道RF接收器（41）。硬币元件可以携带正弦模式电流或均匀电流。

3. 发明申请

US20100026303A1 DOUBLY RESONANT HIGH FIELD RADIO FREQUENCY SURFACE COILS FOR MAGNETIC RESONANCE 有权
标题翻译：双磁共振高频无线电频率磁场线圈
公开(公告)号：US20100026303A1
公开(公告)日：2010-02-04
申请号：US12528541
申请日：2008-01-30
申请人： Zhiyong Zhai , Michael A. Morich , Gordon D. Demeester
发明人： Zhiyong Zhai , Michael A. Morich , Gordon D. Demeester
IPC分类号： G01R33/44
CPC分类号： G01R33/3635 , G01R33/34007 , G01R33/341 , G01R33/3678
摘要： A radio frequency coil comprises an annular conductor or parallel annular conductors (22, 22c, 22d) configured to support: (i) a uniform electrical current distribution generating a first B1 field (B1,uniform) at a first magnetic resonance frequency directed out of a plane of the annular conductor or conductors; and (ii) a sinusoidal electrical current distribution generating a second B1 field (B1,sine) at a second magnetic resonance frequency directed parallel with the plane of the annular conductor or conductors. A magnetic resonance scanner comprises: a magnet (10) generating a static magnetic field (B0); a magnetic field gradient system (14) configured to superimpose selected magnetic field gradients on the static magnetic field; and said radio frequency coil including said annular conductor or parallel annular conductors (22, 22c, 22d).
摘要翻译：射频线圈包括环形导体或平行环形导体（22,22c，22d），其被配置为支持：（i）均匀的电流分布，其以第一磁共振频率产生第一B1场（B1，均匀）环形导体或导体的平面; 和（ii）以与环形导体或导体的平面平行的第二磁共振频率产生第二B1场（B1，正弦）的正弦电流分布。磁共振扫描器包括：产生静磁场（B0）的磁体（10）; 磁场梯度系统（14），被配置为将选定的磁场梯度叠加在静磁场上; 并且所述射频线圈包括所述环形导体或平行环形导体（22,22c，22d）。

4. 发明申请

US20090201019A1 MR INVOLVING HIGH SPEED COIL MODE SWITCHING BETWEEN I-CHANNEL LINEAR, Q-CHANNEL LINEAR, QUADRATURE AND ANTI-QUADRATURE MODES 有权
标题翻译：涉及I通道线性，Q通道线性，平坦度和反平衡模式之间的高速线圈切换
公开(公告)号：US20090201019A1
公开(公告)日：2009-08-13
申请号：US12297658
申请日：2007-04-03
申请人： Zhiyong Zhai , Gordon D. DeMeester , Michael A. Morich , Paul R. Harvey
发明人： Zhiyong Zhai , Gordon D. DeMeester , Michael A. Morich , Paul R. Harvey
IPC分类号： G01R33/34 , G01R33/48
CPC分类号： G01R33/34046 , G01R33/246 , G01R33/3664 , G01R33/3678 , G01R33/5659
摘要： Hybrid circuitry (40, 40′, 40″) for operatively coupling a radio frequency drive signal (70) with a quadrature coil (30) is configurable in one of at least two coil modes of a group consisting of: (i) a linear I channel mode in which an I channel input port (42) is driven without driving a Q channel input port (44); (ii) a linear Q channel mode in which the Q channel input port is driven without driving the I channel input port; (iii) a quadrature mode in which both the I and Q channel input ports are driven with a selected positive phase difference; and (iv) an anti quadrature mode in which both the I and Q channel input ports are driven with a selected negative phase difference. A temporal sequence of the at least two coil modes may be determined and employed to compensate for B inhomogeneity.
摘要翻译：用于将射频驱动信号（70）与正交线圈（30）可操作地耦合的混合电路（40,40'，40“）可配置成以下组中的至少两个线圈模式之一：（i）线性I通道模式，其中驱动I通道输入端口（42）而不驱动Q通道输入端口（44）; （ii）在不驱动I通道输入端口的情况下驱动Q通道输入端口的线性Q通道模式; （iii）正交模式，其中I和Q通道输入端口都以选择的正相位差驱动; 以及（iv）反正交模式，其中I和Q通道输入端口都以选定的负相位差驱动。可以确定并采用至少两个线圈模式的时间序列来补偿B不均匀性。

5. 发明授权

US07990149B2 MR involving high speed coil mode switching between I-channel linear, Q-channel linear, quadrature and anti-quadrature modes 有权
标题翻译：涉及在I通道线性，Q通道线性，正交和反正交模式之间进行高速线圈模式切换的MR
公开(公告)号：US07990149B2
公开(公告)日：2011-08-02
申请号：US12297658
申请日：2007-04-03
申请人： Zhiyong Zhai , Gordon D. DeMeester , Michael A. Morich , Paul R. Harvey
发明人： Zhiyong Zhai , Gordon D. DeMeester , Michael A. Morich , Paul R. Harvey
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/246 , G01R33/3664 , G01R33/3678 , G01R33/5659
摘要： Hybrid circuitry (40, 40′, 40″) for operatively coupling a radio frequency drive signal (70) with a quadrature coil (30) is configurable in one of at least two coil modes of a group consisting of: (i) a linear I channel mode in which an I channel input port (42) is driven without driving a Q channel input port (44); (ii) a linear Q channel mode in which the Q channel input port is driven without driving the I channel input port; (iii) a quadrature mode in which both the I and Q channel input ports are driven with a selected positive phase difference; and (iv) an anti quadrature mode in which both the I and Q channel input ports are driven with a selected negative phase difference. A temporal sequence of the at least two coil modes may be determined and employed to compensate for B1 inhomogeneity.
摘要翻译：用于将射频驱动信号（70）与正交线圈（30）可操作地耦合的混合电路（40,40'，40“）可配置成以下组中的至少两个线圈模式之一：（i）线性 I通道模式，其中驱动I通道输入端口（42）而不驱动Q通道输入端口（44）; （ii）在不驱动I通道输入端口的情况下驱动Q通道输入端口的线性Q通道模式; （iii）正交模式，其中I和Q通道输入端口都以选择的正相位差驱动; 以及（iv）反正交模式，其中I和Q通道输入端口都以选定的负相位差驱动。可以确定并采用至少两个线圈模式的时间序列来补偿B1不均匀性。

6. 发明授权

US07633294B2 Electromagnetic shielding for high field MRI coils 有权
标题翻译：高磁场MRI线圈的电磁屏蔽
公开(公告)号：US07633294B2
公开(公告)日：2009-12-15
申请号：US11913487
申请日：2006-04-19
申请人： Christoph G. Leussler , Kai-Michael Luedeke , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
发明人： Christoph G. Leussler , Kai-Michael Luedeke , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01V3/00
CPC分类号： G01R33/422 , G01R33/3628
摘要： A radio frequency coil for magnetic resonance imaging includes an active coil member (70, 701, 170, 270) that defines an imaging volume. The active coil member has a first open end (74) with a first cross-sectional dimension (dactive). A shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272) substantially surrounds the active coil member. The shield coil member has a constricted open end (88) arranged proximate to the first open end of the active coil member with a constricted cross-sectional dimension (dconst) that is less than the cross-sectional dimension (dShieid) of the shield coil member. In some embodiments, the radio frequency coil further includes an outer shield coil member (100) that is substantially larger than the shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272), and surrounds both the active coil member and the shield coil member.
摘要翻译：用于磁共振成像的射频线圈包括限定成像体积的有源线圈构件（70,701,170,270）。有源线圈构件具有第一横截面尺寸（dactive）的第一开口端（74）。屏蔽线圈构件（72,72,722,723,724,725,172,1722,272）基本上围绕有源线圈构件。屏蔽线圈构件具有靠近有源线圈构件的第一开口端布置的收缩的开口端（88），其缩小的横截面尺寸（dconst）小于屏蔽线圈的横截面尺寸（dShid）会员。在一些实施例中，射频线圈进一步包括外屏蔽线圈构件（100），其大致大于屏蔽线圈构件（72,72,722,723,724,725,172,1722,272），并且包围两者有源线圈构件和屏蔽线圈构件。

7. 发明授权

US07508210B2 Short element TEM coil for ultra-high field MR 失效
标题翻译：用于超高场MR的短元素TEM线圈
公开(公告)号：US07508210B2
公开(公告)日：2009-03-24
申请号：US11569074
申请日：2005-05-11
申请人： Michael A. Morich , Gordon D. Demeester , Zhiyong Zhai , Paul R. Harvey
发明人： Michael A. Morich , Gordon D. Demeester , Zhiyong Zhai , Paul R. Harvey
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/3453
摘要： A transverse electromagnetic (TEM) coil is provided. The TEM coil includes an electrically conductive shell and an end plate disposed at a first end of the shell. The TEM coil also includes a plurality of TEM elements disposed within the shell, the plurality of TEM elements being shorter than the shell.
摘要翻译：提供横向电磁（TEM）线圈。 TEM线圈包括导电壳体和设置在壳体的第一端处的端板。 TEM线圈还包括设置在壳体内的多个TEM元件，多个TEM元件比壳短。

8. 发明申请

US20080265889A1 Multiple-Channel Transmit Magnetic Resonance 审中-公开
标题翻译：多通道发射磁共振
公开(公告)号：US20080265889A1
公开(公告)日：2008-10-30
申请号：US12089057
申请日：2006-09-14
申请人： Zhiyong Zhai , Michael A. Morich , Gordon D. DeMeester
发明人： Zhiyong Zhai , Michael A. Morich , Gordon D. DeMeester
IPC分类号： G01R33/3415
CPC分类号： G01R33/5612 , G01R33/246 , G01R33/3415
摘要： In a transmit apparatus, a multi-channel radio frequency transmitter (30, 46) includes a plurality of transmit elements (32) defining at least two independently operable transmit channels. A transmit configuration selector (54) determines a selected transmit configuration (60) specifying amplitude and phase applied to each transmit channel to generate a B1 field in a corresponding selected region (90) of a subject (38) coupled with the radio frequency transmitter. The transmit configuration selector determines the selected transmit configuration based on B1 mapping (58) of the subject and a B1 field quality assessment employing at least two different B1 field quality measures.
摘要翻译：在发射装置中，多频道射频发射机（30,46）包括限定至少两个可独立操作的发射信道的多个发射元件（32）。发射配置选择器（54）确定指定施加到每个发射信道的幅度和相位的选择的发射配置（60），以在对象（38）的相应选择的区域（90）中产生一个B 1 ）与射频发射机相结合。发射配置选择器基于对象的B 1映射（58）确定所选择的发射配置，并且使用至少两个不同的B＆lt; 1＆gt; 1 现场质量措施。

9. 发明授权

US07403004B2 B1 field control in magnetic resonance imaging 有权
标题翻译： B1磁场成像磁场控制
公开(公告)号：US07403004B2
公开(公告)日：2008-07-22
申请号：US10595582
申请日：2004-10-07
申请人： Michael A. Morich , Gordon D. DeMeester , Zhiyong Zhai
发明人： Michael A. Morich , Gordon D. DeMeester , Zhiyong Zhai
IPC分类号： G01V3/00
CPC分类号： G01R33/583 , G01R33/4835
摘要： Multi-slice magnetic resonance imaging of a region of interest of an imaging subject (16) is performed using a radio frequency coil (40) arranged to generate a B1 magnetic field in the region of interest. One or more processors (44, 82, 88, 110) determine a B1 field value for each slice that is representative of the B1 field over a selected area of the slice, accounting for subject effects on the BI field, and determine an adjusted per-slice radio frequency excitation for each slice that adjusts the B1 field value for the slice to a selected value. A magnetic resonance imaging system (10, 44, 46, 50, 52) acquires magnetic resonance imaging data for each slice using the adjusted per-slice radio frequency excitation for that slice. A reconstruction processor (58) reconstructs the acquired magnetic resonance imaging data into a reconstructed image representation.
摘要翻译：使用布置成在感兴趣区域中产生B 1磁场的射频线圈（40）来执行成像对象（16）感兴趣区域的多层磁共振成像。一个或多个处理器（44,82,88,110）确定代表在片段的选定区域上的B1字段的每个片段的B1字段值，以考虑BI字段上的对象影响，并且确定每个对于每个切片，将切片的B SUB字段值调整为选定的值，以实现 - 射线射频激励。磁共振成像系统（10,44,46,50,52）使用针对该切片的调节的每切片射频激励获取每个切片的磁共振成像数据。重建处理器（58）将所获取的磁共振成像数据重建为重建图像表示。

10. 发明授权

US07282914B2 Specific energy absorption rate model 失效
标题翻译：比能量吸收率模型
公开(公告)号：US07282914B2
公开(公告)日：2007-10-16
申请号：US10560870
申请日：2004-06-30
申请人： Michael A. Morich , Paul R. Harvey , Zhiyong Zhai , Gordon D. DeMeester
发明人： Michael A. Morich , Paul R. Harvey , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01V3/00
CPC分类号： G01R33/28 , A61B5/055 , G01R33/288 , G01R33/583
摘要： An MRI apparatus is provided. The apparatus includes a main magnet for generating a main magnetic field in an examination region, a plurality of gradient coils for generating gradient fields within the main field, an RF transmit coil for transmitting RF signals into the examination region and exciting magnetic resonance in a subject disposed therein in accordance with a plurality of imaging parameters, the transmitted RF signals having a SAR associated therewith, and a SAR processor for maintaining the transmitted RF signals below a prescribed SAR level.
摘要翻译：提供MRI装置。该装置包括用于在检查区域中产生主磁场的主磁体，用于在主场内产生梯度场的多个梯度线圈，用于将RF信号发送到检查区域中的激励磁共振的RF发射线圈根据多个成像参数设置在其中，所发送的RF信号具有与其相关联的SAR，以及SAR处理器，用于将发射的RF信号保持在规定的SAR水平以下。

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