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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

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）。

3. 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。

4. 发明申请

US20080161675A1 Ultra-Short Mri Body Coil 审中-公开
标题翻译：超短Mri体线圈
公开(公告)号：US20080161675A1
公开(公告)日：2008-07-03
申请号：US11817968
申请日：2006-03-03
申请人： Paul R. Harvey , Eerke Holle , Zhiyong Zhai
发明人： Paul R. Harvey , Eerke Holle , Zhiyong Zhai
IPC分类号： A61B5/055
CPC分类号： G01R33/34046 , G01R33/3415
摘要： A magnetic resonance imaging system (10) utilizes an ultra-short RF body coil (36). The ultra-short body coil (36) is shorter than the mechanical equivalent birdcage coil by at least a factor of two. Such coil provides equivalent (Bt) magnetic field-uniformity, while conforming to SAR limitations.
摘要翻译：磁共振成像系统（10）使用超短RF体线圈（36）。超短体线圈（36）比机械等效鸟笼线圈短至少两倍。这种线圈在符合SAR限制的情况下提供等效的（B SUB）磁场均匀性。

5. 发明授权

US09689941B2 Passive B1 field shimming 有权
公开(公告)号：US09689941B2
公开(公告)日：2017-06-27
申请号：US13993689
申请日：2011-12-05
申请人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
发明人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
IPC分类号： G01R33/3873 , G01R33/24 , G01R33/565 , G01R33/54 , G01R33/34
CPC分类号： G01R33/3873 , G01R33/246 , G01R33/34 , G01R33/34076 , G01R33/543 , G01R33/5659
摘要： Coil elements (18) generate a B1 excitation field in an examination region (14), which B1 excitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements (22, 24) are disposed between the coil elements and the subject in order to improve the B1 field uniformity. In one embodiment, passive shimming elements include one or more dielectric rods (55) disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes (24) adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the B1 field generated by the coil element. Active B1 shimming may be combined with passive shimming elements (22, 24) to effect an improved RF field homogeneity result.

6. 发明申请

US20130278262A1 PASSIVE B1 FIELD SHIMMING 有权
标题翻译：被动B1场SHIMMING
公开(公告)号：US20130278262A1
公开(公告)日：2013-10-24
申请号：US13993689
申请日：2011-12-05
申请人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
发明人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
IPC分类号： G01R33/3873
CPC分类号： G01R33/3873 , G01R33/246 , G01R33/34 , G01R33/34076 , G01R33/543 , G01R33/5659
摘要： Coil elements (18) generate a B1 excitation field in an examination region (14), which B1 excitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements (22, 24) are disposed between the coil elements and the subject in order to improve the B1 field uniformity. In one embodiment, passive shimming elements include one or more dielectric rods (55) disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes (24) adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the B1 field generated by the coil element. Active B1 shimming may be combined with passive shimming elements (22, 24) to effect an improved RF field homogeneity result.
摘要翻译：线圈元件（18）在检查区域（14）中产生B1激励场，其中B1激励场由患者负载变形（例如，波长效应）。被动调光元件（22,24）设置在线圈元件和被摄体之间，以提高B1场均匀性。在一个实施例中，被动调光元件包括设置在对象下方的一个或多个介电棒（55），其不产生实质的MR质子信号，并且具有至少100，优选大于500的介电常数。在另一实施例中，管（24）相邻的每个线圈元件被提供有电介质液体，线圈元件和对象之间的电介质液体的厚度调节由线圈元件产生的B1场的相位。有源B1匀场可以与被动调光元件（22,24）组合以实现改进的RF场均匀性结果。

7. 发明申请

US20110115483A1 TRANSMIT/RECEIVE COIL FOR ULTRA-HIGH FIELD MRI 有权
标题翻译：用于超声场MRI的发射/接收线圈
公开(公告)号：US20110115483A1
公开(公告)日：2011-05-19
申请号：US12742976
申请日：2008-12-12
申请人： Zhiyong Zhai , Robert Gauss , Eddy Yu Ping WONG , Michael A. Morich , Kevin M. Nieman , Gordon D. DeMeester
发明人： Zhiyong Zhai , Robert Gauss , Eddy Yu Ping WONG , Michael A. Morich , Kevin M. Nieman , Gordon D. DeMeester
IPC分类号： G01R33/44
CPC分类号： G01R33/3415 , G01R33/5659
摘要： A magnetic resonance coil comprises a first set of coil elements (54, 56, 80) operatively connectable with a transmit channel (66, 74) to couple with a transmit region of sensitivity for a selected load at a magnetic field strength greater than 3 Tesla, and a second set of coil elements (52, 54, 82) operatively connectable with a receive channel (66, 74) to couple with a receive region of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla. The first set of coil elements is arranged proximate to but not surrounding the transmit region of sensitivity, and the second set of coil elements is arranged proximate to but not surrounding the receive region of sensitivity. The first set of coil elements and the second set of coil elements having at least one coil element (52, 56) not in common. The first and second sets of coil elements define transmit and receive regions of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla that are substantially similar.
摘要翻译：磁共振线圈包括可操作地与发射通道（66,74）连接的第一组线圈元件（54,56,80），以在大于3特斯拉的磁场强度下与选定负载的灵敏度的发射区域耦合以及第二组线圈元件（52,54,82），其可操作地与接收通道（66,74）连接，以在大于3特斯拉的磁场强度下与所选择的负载的接收灵敏度区域耦合。第一组线圈元件布置成靠近但不围绕灵敏度的发射区域，并且第二组线圈元件布置成接近但不包围灵敏度的接收区域。第一组线圈元件和第二组线圈元件具有不共同的至少一个线圈元件（52,56）。第一组和第二组线圈元件在大于3特斯拉的大于3特斯拉的磁场强度下为所选择的载荷定义灵敏度的发射和接收区域。

8. 发明授权

US07495443B2 RF coil system for super high field (SHF) MRI 有权
标题翻译：射频线圈系统用于超高场（SHF）MRI
公开(公告)号：US07495443B2
公开(公告)日：2009-02-24
申请号：US10595862
申请日：2004-11-03
申请人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
发明人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/34076 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3642 , G01R33/365 , G01R33/3678 , G01R33/422 , G01R33/5659
摘要： A radio frequency coil system (38) for magnetic resonance imaging includes a plurality of parallel spaced apart rungs (60) which each includes rung capacitors (68). An end cap (64) is disposed at a closed end (66) of the coil system (38). An RF shield (62) is connected to the end cap (64) and surrounds the rungs (60), extending in a direction substantially parallel to rungs (60). The RF coil system (38) may be used as birdcage, TEM, hybrid, combination birdcage and TEM, or other.
摘要翻译：一种用于磁共振成像的射频线圈系统（38）包括多个平行隔开的梯级（60），每个梯级包括梯级电容器（68）。端盖（64）设置在线圈系统（38）的封闭端（66）处。 RF屏蔽（62）连接到端盖（64）并且围绕梯级（60）沿着基本平行于梯级（60）的方向延伸。 RF线圈系统（38）可以用作鸟笼，TEM，混合，组合鸟笼和TEM等。

9. 发明申请

US20080197848A1 Rf Volume Coil With Selectable Field of View 失效
标题翻译：具有可选视场的Rf卷线圈
公开(公告)号：US20080197848A1
公开(公告)日：2008-08-21
申请号：US11917010
申请日：2006-06-13
申请人： Zhiyong Zhai , Michael A. Morich , Gordon D. DeMeester , Robert C. Gauss
发明人： Zhiyong Zhai , Michael A. Morich , Gordon D. DeMeester , Robert C. Gauss
IPC分类号： G01R33/36 , G01R33/34
CPC分类号： G01R33/34046 , G01R33/3664
摘要： A radio frequency coil for magnetic resonance imaging or spectroscopy includes a plurality of generally parallel conductive members (70) surrounding a region of interest (14). One or more end members (72, 74) are disposed generally transverse to the plurality of parallel conductive members. A generally cylindrical radio frequency shield (32) surrounds the plurality of generally parallel conductive members. Switchable circuitry (80, 80′) selectably has: (i) a first switched configuration (90, 90′) in which the conductive members are operatively connected with the one or more end members; and (ii) a second switched configuration (92, 92′) in which the conductive members are operatively connected with the radio frequency shield. The radio frequency coil operates in a birdcage resonance mode in the first switched configuration and operates in a TEM resonance mode in the second switched configuration.
摘要翻译：用于磁共振成像或光谱的射频线圈包括围绕感兴趣区域（14）的多个大致平行的导电构件（70）。一个或多个端部构件（72,74）大致横向于多个平行导电构件设置。通常为圆柱形的射频屏蔽（32）围绕多个大致平行的导电构件。可切换电路（80,80'）可选择地具有：（i）第一开关构造（90,90'），其中导电构件与一个或多个端构件可操作地连接; 和（ii）其中导电构件与射频屏蔽可操作地连接的第二切换配置（92,92'）。射频线圈在第一切换配置中以鸟笼共振模式工作，并且在第二切换配置中以TEM共振模式操作。

10. 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。

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