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1. 发明授权

US06680612B1 Gradient coil apparatus for magnetic resonance imaging 有权
标题翻译：磁共振成像用梯度线圈装置
公开(公告)号：US06680612B1
公开(公告)日：2004-01-20
申请号：US10065417
申请日：2002-10-16
申请人： Graeme Colin McKinnon , Qin Liu
发明人： Graeme Colin McKinnon , Qin Liu
IPC分类号： G01V300
CPC分类号： G01R33/385
摘要： A gradient coil assembly for use with an MR imaging system comprising: a main gradient coil disposed about an imaging axis to produce a gradient field; a corrector coil disposed about an imaging axis and positioned with a return portion substantially overlapping a return portion of main gradient coil. The main gradient coil and said corrector coil cooperate to provide a first field of view, the main gradient coil operates to provide a second field of view. A method of reducing power deposition in a gradient coil assembly comprising: determining a first current density corresponding to a first field-of-view for an effective gradient coil; computing a second current density corresponding to a second field of view, by reducing current from the first current density without changing a sign of said the associated therewith; determining a geometry for a main gradient coil; and ascertaining a geometry for a corrector coil.
摘要翻译：一种用于MR成像系统的梯度线圈组件，包括：围绕成像轴设置的梯度线圈，以产生梯度场; 校正器线圈，围绕成像轴设置并且具有大致与主梯度线圈的返回部分重叠的返回部分定位。主梯度线圈和所述校正线圈协作提供第一视场，主梯度线圈操作以提供第二视场。一种降低梯度线圈组件中的功率沉积的方法，包括：确定对应于有效梯度线圈的第一视场的第一电流密度; 通过从所述第一电流密度减少电流而不改变与其相关联的符号来计算对应于第二视场的第二电流密度; 确定主梯度线圈的几何形状; 并确定校正线圈的几何形状。

2. 发明申请

US20100244835A1 THIN EXTENDED-CAVITY RF COIL FOR MRI 有权
标题翻译：用于MRI的薄延伸射频线圈
公开(公告)号：US20100244835A1
公开(公告)日：2010-09-30
申请号：US12415816
申请日：2009-03-31
申请人： Graeme Colin McKinnon
发明人： Graeme Colin McKinnon
IPC分类号： G01V3/00
CPC分类号： G01R33/422 , G01R33/34046
摘要： Systems and methods for reducing an amount of space occupied by a radio frequency coil assembly in a magnetic resonance imaging system are provided. In one embodiment, a radio frequency coil assembly for a magnetic resonance imaging system includes a radio frequency coil disposed cylindrically around a patient space and a radio frequency shield disposed cylindrically around the patient space and electrically coupled to the axial ends of the radio frequency coil. The radio frequency shield may be configured to extend behind the radio frequency coil, and the axial length of the radio frequency shield may be at least two times the axial length of the radio frequency coil.
摘要翻译：提供了用于减少磁共振成像系统中的射频线圈组件占据的空间量的系统和方法。在一个实施例中，用于磁共振成像系统的射频线圈组件包括围绕患者空间圆柱形设置的射频线圈和围绕患者空间圆柱形设置并电耦合到射频线圈的轴向端的射频屏蔽。射频屏蔽可以被配置成在射频线圈之后延伸，并且射频屏蔽的轴向长度可以是射频线圈的轴向长度的至少两倍。

3. 发明授权

US06882153B2 Gradient coil apparatus for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的梯度线圈装置
公开(公告)号：US06882153B2
公开(公告)日：2005-04-19
申请号：US10709016
申请日：2004-04-07
申请人： Robert Michael Vavrek , Graeme Colin McKinnon , Daniel Joseph Schaefer
发明人： Robert Michael Vavrek , Graeme Colin McKinnon , Daniel Joseph Schaefer
IPC分类号： A61B5/055 , G01R33/385 , G01V3/00
CPC分类号： G01R33/385
摘要： A method for decreasing gradient field pulse sequence duration for a magnetic resonance imaging system, the method comprising: establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view; applying a weighting factor associated with each axis of the plurality of axes; establishing a slew rate responsive to a selected axis of the plurality of axes that exhibits a largest gradient field strength in light of the weighting factor and the field of view; and operating the plurality of axes at the largest gradient field strength.
摘要翻译：一种用于减小磁共振成像系统的梯度场脉冲序列持续时间的方法，所述方法包括：为视野的多个轴的轴线建立允许的梯度场强; 施加与所述多个轴的每个轴相关联的加权因子; 根据加权因子和视场，响应于显示出最大梯度场强的多个轴的所选择的轴来建立转换速率; 并以最大的梯度场强度操作多个轴。

4. 发明授权

US06788055B2 Modular timemasking sequence programming for imaging system 有权
标题翻译：用于成像系统的模块化Timemasking序列编程
公开(公告)号：US06788055B2
公开(公告)日：2004-09-07
申请号：US09751312
申请日：2000-12-29
申请人： Graeme Colin McKinnon , Paul Edgar Licato , Qing Tan , Lawrence Edward Ploétz
发明人： Graeme Colin McKinnon , Paul Edgar Licato , Qing Tan , Lawrence Edward Ploétz
IPC分类号： G01V300
CPC分类号： G01R33/54 , G05B19/0426 , G05B2219/23389 , G05B2219/2652 , G06F19/00
摘要： A technique is described for programming multiple axes or channels of a system, such as an MRI system. Modular component time masks are defined including information for activity on at least one axis and a time boundary for execution of the activity. The modular components may be stored in a library, and assembled to define desired control sequences. Activity may include pulse sequences for coils in the imaging system. The modular components facilitate definition of complex multi-axis control sequences while respecting inherent physical constraints of the system. Time optimized control sequences may be developed from the modular components by reference to beginning and ending times of a series of components, or to anchor time points associated with the components.
摘要翻译：描述了用于编程诸如MRI系统的系统的多个轴或通道的技术。定义模块化组件时间掩码，包括至少一个轴上的活动信息和执行活动的时间边界。模块化组件可以存储在库中，并被组合以定义所需的控制序列。活动可以包括成像系统中线圈的脉冲序列。模块化组件有助于定义复杂的多轴控制序列，同时尊重系统的固有物理约束。可以通过参考一系列组件的开始和结束时间或者与组件相关联的锚定时间点从模块化组件开发时间优化的控制序列。

5. 发明授权

US08143893B2 Thin extended-cavity RF coil for MRI 有权
标题翻译：用于MRI的薄型扩展腔RF线圈
公开(公告)号：US08143893B2
公开(公告)日：2012-03-27
申请号：US12415816
申请日：2009-03-31
申请人： Graeme Colin McKinnon
发明人： Graeme Colin McKinnon
IPC分类号： G01V3/00
CPC分类号： G01R33/422 , G01R33/34046
摘要： Systems and methods for reducing an amount of space occupied by a radio frequency coil assembly in a magnetic resonance imaging system are provided. In one embodiment, a radio frequency coil assembly for a magnetic resonance imaging system includes a radio frequency coil disposed cylindrically around a patient space and a radio frequency shield disposed cylindrically around the patient space and electrically coupled to the axial ends of the radio frequency coil. The radio frequency shield may be configured to extend behind the radio frequency coil, and the axial length of the radio frequency shield may be at least two times the axial length of the radio frequency coil.
摘要翻译：提供了用于减少磁共振成像系统中的射频线圈组件占据的空间量的系统和方法。在一个实施例中，用于磁共振成像系统的射频线圈组件包括围绕患者空间圆柱形设置的射频线圈和围绕患者空间圆柱形设置并电耦合到射频线圈的轴向端的射频屏蔽。射频屏蔽可以被配置成在射频线圈之后延伸，并且射频屏蔽的轴向长度可以是射频线圈的轴向长度的至少两倍。

6. 发明授权

US08102177B2 Using S-parameter measurements to manage SAR and transmit gain in MRI 有权
标题翻译：使用S参数测量来管理SAR和MRI中的增益
公开(公告)号：US08102177B2
公开(公告)日：2012-01-24
申请号：US12415933
申请日：2009-03-31
申请人： Graeme Colin McKinnon
发明人： Graeme Colin McKinnon
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/288 , G01R33/5612 , G01R33/5659
摘要： Systems and methods for controlling a magnetic resonance imaging system are provided. In one embodiment, a magnetic resonance imaging system includes a radio frequency coil with a plurality of conductive coil elements, control circuitry that determines, based at least in part on a measurement of scattering parameters, a plurality of forward voltages that will cause power deposition into an object within a predetermined specific absorption rate, and an amplifier configured to apply the determined plurality of forward voltages respectively to the plurality of coil elements. The control circuitry may determine the plurality of forward voltages based at least in part on an unloaded measurement of scattering parameters and a loaded measurement of scattering parameters.
摘要翻译：提供了用于控制磁共振成像系统的系统和方法。在一个实施例中，磁共振成像系统包括具有多个导电线圈元件的射频线圈，控制电路至少部分地基于散射参数的测量确定将导致功率沉积的多个正向电压预定特定吸收率内的物体，以及分别将所确定的多个正向电压分别施加到多个线圈元件的放大器。控制电路可以至少部分地基于散射参数的无负载测量和散射参数的加载测量来确定多个正向电压。

7. 发明授权

US07161511B2 Linearization system and method 有权
标题翻译：线性化系统和方法
公开(公告)号：US07161511B2
公开(公告)日：2007-01-09
申请号：US11145486
申请日：2005-06-03
申请人： Glen Peter Koste , Richard Louis Zinser , Graeme Colin McKinnon
发明人： Glen Peter Koste , Richard Louis Zinser , Graeme Colin McKinnon
IPC分类号： H01M1/12 , G01N24/00
CPC分类号： H03M1/1033 , H03M1/12
摘要： A system for training a linearization compensation model includes a tone generator for providing at least two different RF tones, receiver path components for processing the RF tones, an analog-to-digital converter for converting the processed RF tones into digital signals, and a processor for using the digital signals to generate the linearization error compensation model. The resulting compensation model is particularly useful in a linearization system which includes a receiver for measuring a signal, an electro-optical modulator configured for converting the measured signal to an optical signal, an optical-electrical detector configured for converting the optical signal to an analog electrical signal, an analog-to-digital converter for converting the analog electrical signal into a digital signal with the processor being used for removing linearization errors from the digital signal.
摘要翻译：用于训练线性化补偿模型的系统包括用于提供至少两个不同的RF音调的音调发生器，用于处理RF音调的接收器路径组件，用于将经处理的RF音调转换为数字信号的模数转换器，以及处理器用于使用数字信号产生线性化误差补偿模型。所产生的补偿模型在包括用于测量信号的接收机的线性化系统中特别有用，配置用于将测量信号转换为光信号的电光调制器，配置成将光信号转换成模拟信号的光电检测器电信号，用于将处理器用于从数字信号中去除线性化误差的模拟电信号转换成数字信号的模拟 - 数字转换器。

8. 发明申请

US20100244840A1 USING S-PARAMETER MEASUREMENTS TO MANAGE SAR AND TRANSMIT GAIN 有权
标题翻译：使用S参数测量来管理SAR和发送增益
公开(公告)号：US20100244840A1
公开(公告)日：2010-09-30
申请号：US12415933
申请日：2009-03-31
申请人： Graeme Colin McKinnon
发明人： Graeme Colin McKinnon
IPC分类号： G01R33/32
CPC分类号： G01R33/3415 , G01R33/288 , G01R33/5612 , G01R33/5659
摘要： Systems and methods for controlling a magnetic resonance imaging system are provided. In one embodiment, a magnetic resonance imaging system includes a radio frequency coil with a plurality of conductive coil elements, control circuitry that determines, based at least in part on a measurement of scattering parameters, a plurality of forward voltages that will cause power deposition into an object within a predetermined specific absorption rate, and an amplifier configured to apply the determined plurality of forward voltages respectively to the plurality of coil elements. The control circuitry may determine the plurality of forward voltages based at least in part on an unloaded measurement of scattering parameters and a loaded measurement of scattering parameters.
摘要翻译：提供了用于控制磁共振成像系统的系统和方法。在一个实施例中，磁共振成像系统包括具有多个导电线圈元件的射频线圈，控制电路至少部分地基于散射参数的测量确定将导致功率沉积的多个正向电压预定特定吸收率内的物体，以及分别将所确定的多个正向电压分别施加到多个线圈元件的放大器。控制电路可以至少部分地基于散射参数的无负载测量和散射参数的加载测量来确定多个正向电压。

9. 发明授权

US06975116B2 Method and apparatus for multiple field of view gradient coils 失效
标题翻译：多视野梯度线圈的方法和装置
公开(公告)号：US06975116B2
公开(公告)日：2005-12-13
申请号：US10722975
申请日：2003-11-26
申请人： Graeme Colin McKinnon
发明人： Graeme Colin McKinnon
IPC分类号： A61B5/055 , G01R33/385 , G01V3/00
CPC分类号： G01R33/385
摘要： A method of operating a magnetic resonance imaging system having a first coil and a second coil to achieve an imaging volume includes, in a first mode, achieving the imaging volume by using a sum field from both of the coils, and, in a second mode, achieving the imaging volume by using a difference field from both of the coils.
摘要翻译：一种操作具有第一线圈和第二线圈以实现成像体积的磁共振成像系统的方法包括：在第一模式中，通过使用来自两个线圈的和场来实现成像体积，并且在第二模式通过使用来自两个线圈的差分场来实现成像体积。

10. 发明授权

US06249120B1 Modular timemasking sequence programming for imaging system 失效
标题翻译：用于成像系统的模块化Timemasking序列编程
公开(公告)号：US06249120B1
公开(公告)日：2001-06-19
申请号：US09120920
申请日：1998-07-22
申请人： Graeme Colin McKinnon , Paul Edgar Licato , Qing Tan , Lawrence Edward Ploetz
发明人： Graeme Colin McKinnon , Paul Edgar Licato , Qing Tan , Lawrence Edward Ploetz
IPC分类号： G01V300
CPC分类号： G01R33/54 , G05B19/0426 , G05B2219/23389 , G05B2219/2652 , G06F19/00
摘要： A technique is described for programming multiple axes or channels of a system, such as an MRI system. Modular component time masks are defined including information for activity on at least one axis and a time boundary for execution of the activity. The modular components may be stored in a library, and assembled to define desired control sequences. Activity may include pulse sequences for coils in the imaging system. The modular components facilitate definition of complex multi-axis control sequences while respecting inherent physical constraints of the system. Time optimized control sequences may be developed from the modular components by reference to beginning and ending times of a series of components, or to anchor time points associated with the components.
摘要翻译：描述了用于编程诸如MRI系统的系统的多个轴或通道的技术。定义模块化组件时间掩码，包括至少一个轴上的活动信息和执行活动的时间边界。模块化组件可以存储在库中，并被组合以定义所需的控制序列。活动可以包括成像系统中线圈的脉冲序列。模块化组件有助于定义复杂的多轴控制序列，同时尊重系统的固有物理约束。可以通过参考一系列组件的开始和结束时间或者与组件相关联的锚定时间点从模块化组件开发时间优化的控制序列。

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