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1.发明授权Magnetic resonance apparatus with RF amplifier(s) disposed within the spaced distance between the primary and secondary gradient coil windings 有权具有RF放大器的磁共振装置设置在初级和次级梯级线圈绕组之间的间隔距离内公开(公告)号：US07622927B2
公开(公告)日：2009-11-24
申请号：US12101252
申请日：2008-04-11
IPC分类号： G01V3/00
CPC分类号： G01R33/3858 , G01R33/34046 , G01R33/34076 , G01R33/3614 , G01R33/385 , G01R33/4215
摘要： An arrangement configured for controlling an antenna arrangement in a magnetic resonance device has an antenna arrangement that surrounds an examination region and that has at least one antenna element configured for emitting an amplified transmit signal. At least one amplifier is provided, at the input of which a high-frequency transmit signal is connected, which is present on the output side of the amplifier as an amplified transmit signal. The amplifier is connected to a feed point of the antenna arrangement on the output side, in order to emit the amplified transmit signal. Coil windings of a primary gradient coil are also provided, which at least partially include the antenna arrangement and the examination region. Coil windings of a secondary gradient coil at least partially include the coil windings of the primary gradient coil, the antenna arrangement (and the examination region). The coil windings of the secondary gradient coil and the coil windings of the primary gradient coil are at a distance from one another, and within that distance the at least one amplifier is arranged.
摘要翻译： 配置用于控制磁共振装置中的天线装置的装置具有围绕检查区域的天线装置，并且具有配置成发射放大的发射信号的至少一个天线元件。 提供至少一个放大器，在其输入处连接有高频发射信号，其作为放大的发射信号存在于放大器的输出侧。 放大器连接到输出侧的天线装置的馈电点，以便发射放大的发射信号。 还提供了主梯度线圈的线圈绕组，其至少部分地包括天线装置和检查区域。 次级梯度线圈的线圈绕组至少部分地包括主梯度线圈的线圈绕组，天线装置（和检查区域）。 次级梯度线圈的线圈绕组和主梯度线圈的线圈绕组彼此间隔一定距离，并且在该距离内布置至少一个放大器。
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2.发明申请MAGNETIC RESONANCE APPARATUS WITH RF AMPLIFIER(S) DISPOSED WITHIN THE SPACED DISTANCE BETWEEN THE PRIMARY AND SECONDARY GRADIENT COIL WINDINGS 有权带有RF放大器的磁性共振装置在主要和次级线圈绕组之间的间隔距离内处理公开(公告)号：US20090256571A1
公开(公告)日：2009-10-15
申请号：US12101252
申请日：2008-04-11
IPC分类号： G01R33/28
CPC分类号： G01R33/3858 , G01R33/34046 , G01R33/34076 , G01R33/3614 , G01R33/385 , G01R33/4215
摘要： An arrangement for controlling an antenna arrangement in a magnetic resonance device has an antenna arrangement that surrounds an examination region and that has at least one antenna element for emitting an amplified transmit signal. At least one amplifier is provided, at the input of which a high-frequency transmit signal is connected, which is present on the output side of the amplifier as an amplified transmit signal. The amplifier is connected to a feed point of the antenna arrangement on the output side, in order to emit the amplified transmit signal. Coil windings of a primary gradient coil are also provided, which at least partially include the antenna arrangement and the examination region. Coil windings of a secondary gradient coil at least partially include the coil windings of the primary gradient coil, the antenna arrangement (and the examination region). The coil windings of the secondary gradient coil and the coil windings of the primary gradient coil are at a distance from one another, in which the at least one amplifier is arranged.
摘要翻译： 用于控制磁共振装置中的天线装置的装置具有围绕检查区域的天线装置，并且具有用于发射放大的发射信号的至少一个天线元件。 提供至少一个放大器，在其输入处连接有高频发射信号，其作为放大的发射信号存在于放大器的输出侧。 放大器连接到输出侧的天线装置的馈电点，以便发射放大的发射信号。 还提供了主梯度线圈的线圈绕组，其至少部分地包括天线装置和检查区域。 次级梯度线圈的线圈绕组至少部分地包括主梯度线圈的线圈绕组，天线装置（和检查区域）。 次级梯度线圈的线圈绕组和主梯度线圈的线圈绕组彼此间隔开，其中布置有至少一个放大器。
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公开(公告)号：US20080231282A1
公开(公告)日：2008-09-25
申请号：US12074892
申请日：2008-03-07
IPC分类号： G01R33/36
CPC分类号： G01R33/5612 , G01R33/3415 , G01R33/36 , G01R33/3607 , G01R33/3614
摘要： Example systems, apparatus, circuits, and so on described herein concern parallel transmission in MRI. One example apparatus includes at least two field effect transistors (FETs) that are connected by a coil that includes an LC (inductance-capacitance) leg. The apparatus includes a controller that inputs a digital signal to the FETs to control the production of an output analog radio frequency (RF) signal. The LC leg is to selectively alter the output analog RF signal and the analog RF signal is used in parallel magnetic resonance imaging (MRI) transmission.
摘要翻译： 本文所述的示例系统，装置，电路等涉及MRI中的并行传输。 一个示例性装置包括由包括LC（电感 - 电容）支路的线圈连接的至少两个场效应晶体管（FET）。 该装置包括一个控制器，该控制器将数字信号输入到FET以控制输出模拟射频（RF）信号的产生。 LC支路是选择性地改变输出模拟RF信号，并且模拟RF信号用于并行磁共振成像（MRI）传输。
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4.发明授权Switched mode pre-amplification and am feedback for on-coil switched mode amplifiers in parallel transmission MRI 有权开关模式预放大和并联传输MRI中线圈开关模式放大器的反馈公开(公告)号：US08294465B2
公开(公告)日：2012-10-23
申请号：US12750808
申请日：2010-03-31
IPC分类号： G01V3/00
CPC分类号： H03F3/217
摘要： Example systems, apparatus, circuits, and so on described herein concern parallel transmission in MRI with on-coil current-mode (CMCD) amplifiers. One example apparatus includes switched voltage-mode class D (VMCD) pre-amplifiers. Another example apparatus includes amplitude modulation of the output of the CMCD amplifiers using feedback control based, at least in part, on a comparison of an envelope of transmit coil current to an envelope of an input RF pulse.
摘要翻译： 本文所述的示例系统，装置，电路等涉及具有线圈电流模式（CMCD）放大器的MRI中的并行传输。 一个示例性设备包括切换电压模式D类（VMCD）前置放大器。 至少部分地基于发射线圈电流的包络与输入RF脉冲的包络的比较，使用反馈控制的CMCD放大器的输出的振幅调制。
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公开(公告)号：US07671595B2
公开(公告)日：2010-03-02
申请号：US12074892
申请日：2008-03-07
IPC分类号： G01V3/001
CPC分类号： G01R33/5612 , G01R33/3415 , G01R33/36 , G01R33/3607 , G01R33/3614
摘要： Example systems, apparatus, circuits, and so on described herein concern parallel transmission in MRI. One example apparatus includes at least two field effect transistors (FETs) that are connected by a coil that includes an LC (inductance-capacitance) leg. The apparatus includes a controller that inputs a digital signal to the FETs to control the production of an output analog radio frequency (RF) signal. The LC leg is to selectively alter the output analog RF signal and the analog RF signal is used in parallel magnetic resonance imaging (MRI) transmission.
摘要翻译： 本文所述的示例系统，装置，电路等涉及MRI中的并行传输。 一个示例性装置包括由包括LC（电感 - 电容）支路的线圈连接的至少两个场效应晶体管（FET）。 该装置包括一个控制器，该控制器将数字信号输入到FET以控制输出模拟射频（RF）信号的产生。 LC支路是选择性地改变输出模拟RF信号，并且模拟RF信号用于并行磁共振成像（MRI）传输。
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6.发明授权公开(公告)号：US07902823B2
公开(公告)日：2011-03-08
申请号：US12150790
申请日：2008-05-01
CPC分类号： G01R33/5611 , G01R33/56308
摘要： Example methods, apparatus, and systems associated with dynamic parallel magnetic resonance imaging (DpMRI) are presented. One example system facilitates separating data associated with a dynamic portion of a dynamic magnetic resonance image from data associated with a static portion of the dynamic magnetic resonance image. The system computes reconstruction parameters for a DpMRI reconstruction processes for both the dynamic portion of the image and the static portion of the image. The example system produces a DpMRI image based on separate reconstructions of the dynamic portion of a dynamic magnetic resonance image and the static portion of a dynamic magnetic resonance image. The separate reconstructions may depend on separate sets of reconstruction parameters and on separated static data and dynamic data.
摘要翻译： 提出了与动态并联磁共振成像（DpMRI）相关的示例方法，设备和系统。 一个示例性系统有助于将与动态磁共振图像的动态部分相关联的数据与与动态磁共振图像的静态部分相关联的数据分离。 系统为图像的动态部分和图像的静态部分计算DpMRI重建过程的重建参数。 该示例系统基于动态磁共振图像的动态部分和动态磁共振图像的静态部分的单独重建产生DpMRI图像。 单独的重建可能取决于单独的重建参数集合和分离的静态数据和动态数据。
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公开(公告)号：US20100063380A1
公开(公告)日：2010-03-11
申请号：US12283196
申请日：2008-09-10
IPC分类号： A61B5/055
CPC分类号： G01R33/5614 , A61B5/055 , G01R33/5602 , G01R33/5607 , G01R33/56333
摘要： Systems, methods, and other embodiments associated with steady state dark blood magnetic resonance imaging MRI are described. One example method includes controlling an MRI apparatus to produce a steady state pulse sequence. The example method may also include controlling the MRI apparatus to generate radio frequency (RF) energy and magnetic gradients associated with the steady state pulse sequence. The steady state pulse sequence is different from conventional steady state pulses in that it is characterized by regularly spaced slice selection excitation pulses to excite a region to be imaged in an object to be imaged using a consistent repetition time (TR), a set of readout modules, and a set of a magnetization preparation modules. A magnetization preparation module is characterized by gradients associated with imaging not being active, gradients associated with slice selection being active, and RF pulses associated with slice selection being active.
摘要翻译： 描述与稳态暗血液磁共振成像MRI相关联的系统，方法和其它实施方案。 一个示例性方法包括控制MRI装置以产生稳态脉冲序列。 该示例性方法还可以包括控制MRI设备以产生与稳态脉冲序列相关联的射频（RF）能量和磁梯度。 稳态脉冲序列与常规稳态脉冲不同，其特征在于规则间隔的切片选择激励脉冲，以使用一致的重复时间（TR）来激发待成像对象中要成像的区域，一组读出 模块和一组磁化准备模块。 磁化准备模块的特征在于与成像不相关的梯度，与切片选择相关的梯度是有效的，以及与切片选择相关联的RF脉冲是有效的。
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8.发明申请公开(公告)号：US20090177075A1
公开(公告)日：2009-07-09
申请号：US12290343
申请日：2008-10-29
IPC分类号： A61B5/055
CPC分类号： G01R33/5613 , G01R33/5602 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with RE-TOSSI are described. One system embodiment includes an MRI apparatus configured to produce a RE-TOSSI pulse sequence and to acquire T2-weighted images in response to the RE-TOSSI pulse sequence. An example RE-TOSSI pulse sequence includes a TOSSI portion and a non-inverting, non-TOSSI portion.
摘要翻译： 描述了与RE-TOSSI相关联的系统，方法和其它实施例。 一个系统实施例包括被配置为产生RE-TOSSI脉冲序列并响应于RE-TOSSI脉冲序列获取T2加权图像的MRI设备。 示例性RE-TOSSI脉冲序列包括TOSSI部分和非反相非TOSSI部分。
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公开(公告)号：US07558414B2
公开(公告)日：2009-07-07
申请号：US11519105
申请日：2006-09-11
申请人： Mark A. Griswold
发明人： Mark A. Griswold
IPC分类号： G06K9/00
CPC分类号： G01R33/561 , G01R33/4824 , G01R33/5608
摘要： Systems and methods using an image produced by a constrained image reconstruction process as a constraint in a forward iterative reconstruction process are described. One example system may include a constrained reconstruction logic to receive an initial data having an initial format and to produce an image data. The example system may include an iterative reconstruction logic that uses the image data as a constraint in a forward iterative step and that computes a correction factor based on comparing the image data to a reference data. The example system may include a deconstruction logic to deconstruct the image data into a deconstructed image data having the initial format and to selectively update the deconstructed image data based, at least in part, on the correction factor.
摘要翻译： 描述使用由约束图像重建处理产生的图像作为前向迭代重建过程中的约束的系统和方法。 一个示例系统可以包括用于接收具有初始格式并且产生图像数据的初始数据的约束重建逻辑。 该示例系统可以包括迭代重建逻辑，其将图像数据用作前向迭代步骤中的约束，并且基于将图像数据与参考数据进行比较来计算校正因子。 示例系统可以包括解构逻辑，以将图像数据解构成具有初始格式的解构图像数据，并且至少部分地基于校正因子来选择性地更新解构图像数据。
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公开(公告)号：US07940044B2
公开(公告)日：2011-05-10
申请号：US12783779
申请日：2010-05-20
申请人： Mark A. Griswold , Martin Blaimer , Felix Breuer
发明人： Mark A. Griswold , Martin Blaimer , Felix Breuer
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with determining a phase-encoding direction for parallel MRI are described. One example, method includes selecting a set of projection directions along which an MRI apparatus is to apply RF energy to an object to be imaged. The method includes controlling the MRI apparatus to selecting a set of projection directions and to acquire MR signal from the object through a set of detectors. The method includes analyzing the MR signal to identify individual sensitivities for members of the set of detectors and selecting a phase-encoding direction for a pMRI session based on the individual sensitivities for the members. The method produces a concrete, tangible, and useful result by controlling the MRI apparatus to perform the pMRI session based on the selected phase-encoding direction.
摘要翻译： 描述了与确定并行MRI的相位编码方向相关联的示例系统，方法和装置。 一个示例性方法包括选择一组投影方向，MRI设备将沿着该方向将RF能量应用于要成像的对象。 该方法包括控制MRI装置选择一组投影方向，并通过一组检测器从对象获取MR信号。 该方法包括分析MR信号以识别该组检测器的成员的个体灵敏度，并且基于成员的个体灵敏度来选择pMRI会话的相位编码方向。 该方法通过控制MRI装置基于所选择的相位编码方向执行pMRI会话来产生具体的，有形的和有用的结果。
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