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    • 4. 发明授权
    • Magnetic resonance phase contrast angiography with rotating coding gradients
    • 磁共振相位对比血管造影与旋转编码梯度
    • US09500734B2
    • 2016-11-22
    • US14036279
    • 2013-09-25
    • Andreas GreiserPeter Schmitt
    • Andreas GreiserPeter Schmitt
    • G01V3/00G01R33/563G01R33/48
    • G01R33/5635G01R33/4826G01R33/56316
    • In a method and magnetic resonance (MR) system to generate an MR phase contrast angiography image of an examination subject, velocity-dependent phase information is impressed on moving spins in the examination subject by switching additional bipolar coding gradients that are in addition to the basic phase coding and readout gradients. For the creation of the MR phase contrast angiography images, the MR signals of the examination subject are read out in raw data space with a non-Cartesian acquisition pattern during a readout gradient. The additional bipolar coding gradients switched such that they proceed along a coordinate system that corresponds to the non-Cartesian acquisition pattern, and such that a coordinate axis of this coordinate system proceed along the readout gradient.
    • 在用于产生检查对象的MR相位对比血管造影图像的方法和磁共振(MR)系统中,速度相关相位信息通过切换附加的基本的双极性编码梯度而印在检查对象的移动自旋上 相位编码和读出梯度。 为了创建MR相位对比血管造影图像,检查对象的MR信号在读数梯度期间以非笛卡尔采集模式在原始数据空间中被读出。 附加的双极编码梯度被切换,使得它们沿着对应于非笛卡尔采集模式的坐标系进行,并且使得该坐标系的坐标轴沿着读出梯度进行。
    • 5. 发明授权
    • System for ordering frequency domain components representing MR image data
    • 用于订购代表MR图像数据的频域分量的系统
    • US09442961B2
    • 2016-09-13
    • US13736201
    • 2013-01-08
    • Peter SchmittGerhard LaubYutaka NatsuakiRandall Kroeker
    • Peter SchmittGerhard LaubYutaka NatsuakiRandall Kroeker
    • G06F17/30G01R33/48G01R33/563G01R33/561
    • G06F17/3028G01R33/48G01R33/4818G01R33/4824G01R33/5619G01R33/5635
    • A system orders acquisition of frequency domain components representing MR image data for storage in a storage array (e.g., k-space). A storage array of individual data elements stores corresponding individual frequency components comprising an MR dataset. The array of individual data elements has a designated center and individual data elements individually have a radius to the designated center. A magnetic field generator generates a magnetic field for use in acquiring multiple individual frequency components corresponding to individual data elements in the storage array. The individual frequency components are successively acquired in an order in which radius of respective corresponding individual data elements increases and decreases as the multiple individual frequency components are sequentially acquired during acquisition of an MR dataset representing an MR image. A storage processor stores individual frequency components acquired using the magnetic field in corresponding individual data elements in the array.
    • 系统命令采集代表用于存储在存储阵列(例如,k空间)中的MR图像数据的频域分量。 各个数据元素的存储阵列存储包括MR数据集的相应单独的频率分量。 单个数据元素的阵列具有指定的中心,并且各个数据元素各自具有到指定中心的半径。 磁场发生器产生用于获取对应于存储阵列中的各个数据元素的多个单独频率分量的磁场。 在采集表示MR图像的MR数据集的顺序获取时,以相应的各个数据元素的半径逐渐增加和减小的顺序连续获取各个频率分量。 存储处理器将使用磁场获取的各个频率分量存储在阵列中的相应的单个数据元素中。
    • 7. 发明授权
    • Magnetic resonance system and method for obtaining magnetic resonance images of a body region with a flowing medium therein
    • 磁共振系统和用于获得其中具有流动介质的体区的磁共振图像的方法
    • US08554301B2
    • 2013-10-08
    • US13177730
    • 2011-07-07
    • Peter Schmitt
    • Peter Schmitt
    • A61B5/05G06K9/00
    • G01R33/5635G01R33/4838G01R33/5602
    • A method to create magnetic resonance images of a predetermined imaging volume within an examination subject with a magnetic resonance system includes the following steps: Localize an inflow that supplies the imaging volume. Form a specific volume that at least partially includes the predetermined imaging volume and that is adapted to the inflow such that the specific volume has a recess into the specific volume at the inflow, via which recess at least a partial segment of the inflow is removed from the specific volume. Saturate or invert the magnetization of the specific volume by means of the magnetic resonance system. Detect measurement signals from the imaging volume. Create the MR images of the imaging volume by means of the measurement signals.
    • 使用磁共振系统在检查对象内创建预定成像体积的磁共振图像的方法包括以下步骤:定位提供成像体积的流入。 形成至少部分地包括预定成像体积并且适于流入的比容积,使得比容积具有在流入处的比容积中的凹陷,通过该凹槽至少部分流入部分被从 具体体积。 通过磁共振系统饱和或反转比体积的磁化。 从成像体积检测测量信号。 通过测量信号创建成像体积的MR图像。
    • 9. 发明申请
    • SYSTEM FOR ORDERING FREQUENCY DOMAIN COMPONENTS REPRESENTING MR IMAGE DATA
    • 用于订购代表MR图像数据的频域组件的系统
    • US20130119990A1
    • 2013-05-16
    • US13736201
    • 2013-01-08
    • Peter SchmittGerhard LaubYutaka NatsuakiRandall Kroeker
    • Peter SchmittGerhard LaubYutaka NatsuakiRandall Kroeker
    • G06F17/30G01R33/48
    • G06F17/3028G01R33/48G01R33/4818G01R33/4824G01R33/5619G01R33/5635
    • A system orders acquisition of frequency domain components representing MR image data for storage in a storage array (e.g., k-space). A storage array of individual data elements stores corresponding individual frequency components comprising an MR dataset. The array of individual data elements has a designated center and individual data elements individually have a radius to the designated center. A magnetic field generator generates a magnetic field for use in acquiring multiple individual frequency components corresponding to individual data elements in the storage array. The individual frequency components are successively acquired in an order in which radius of respective corresponding individual data elements increases and decreases as the multiple individual frequency components are sequentially acquired during acquisition of an MR dataset representing an MR image. A storage processor stores individual frequency components acquired using the magnetic field in corresponding individual data elements in the array.
    • 系统命令采集代表用于存储在存储阵列(例如,k空间)中的MR图像数据的频域分量。 各个数据元素的存储阵列存储包括MR数据集的相应单独的频率分量。 单个数据元素的阵列具有指定的中心,并且各个数据元素各自具有到指定中心的半径。 磁场发生器产生用于获取对应于存储阵列中的各个数据元素的多个单独频率分量的磁场。 在采集表示MR图像的MR数据集的顺序获取时,以相应的各个数据元素的半径逐渐增加和减小的顺序连续获取各个频率分量。 存储处理器将使用磁场获取的各个频率分量存储在阵列中的相应的单个数据元素中。
    • 10. 发明申请
    • SAMPLING PATTERN FOR ITERATIVE MAGNETIC RESONANCE IMAGE RECONSTRUCTION
    • 用于迭代磁共振图像重建的采样模式
    • US20130049752A1
    • 2013-02-28
    • US13592675
    • 2012-08-23
    • Jana HutterPeter Schmitt
    • Jana HutterPeter Schmitt
    • G01R33/54
    • G01R33/5611G01R33/5635
    • In a method to generate magnetic resonance (MR) images of an examination subject, MR signals are detected simultaneously with multiple coils, each coil having its own coil characteristic. In the detection of the MR signals, raw data space is incompletely filled with MR signals; with raw data space being undersampled in a central raw data region with a coherent acquisition pattern that is composed of a spatially repeating set of raw data points; and raw data space outside of the central raw data region is sampled with an incoherent acquisition pattern. The MR image is reconstructed from the detected MR signals, step-by-step in an iterative reconstruction procedure using a reconstruction matrix A, starting from an initial estimate; wherein the reconstruction matrix has continuing information about the coil characteristics with which the MR signals were detected.
    • 在产生检查对象的磁共振(MR)图像的方法中,与多个线圈同时检测MR信号,每个线圈具有其自己的线圈特性。 在MR信号的检测中,原始数据空间不完全充满MR信号; 原始数据空间在具有由空间上重复的原始数据点组合的相干采集模式的中央原始数据区域中欠采样; 并且以非相干采集模式对中心原始数据区域外的原始数据空间进行采样。 从初始估计开始,使用重构矩阵A,从迭代重建过程中逐步地从检测到的MR信号中重建MR图像; 其中重建矩阵具有关于检测到MR信号的线圈特性的持续信息。