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    MRI method and apparatus for adaptive channel reduction in parallel imaging
    1.
    发明授权
    MRI method and apparatus for adaptive channel reduction in parallel imaging 失效
    用于并行成像中自适应信道减少的MRI方法和装置

    公开(公告)号：US07576536B2

    公开(公告)日：2009-08-18

    申请号：US11430384

    申请日：2006-05-08

    申请人： James Akao ,  G. Randy Duensing ,  Feng Huang

    发明人： James Akao ,  G. Randy Duensing ,  Feng Huang

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611

    摘要： The subject invention pertains to method and apparatus for parallel imaging. The subject method can be utilized with imaging systems utilizing parallel imaging techniques. In a specific embodiment, the subject invention can be used in magnetic resonance imaging (MRI). A specific embodiment of the subject invention can reduce parallel reconstruction CPU and system resources usage by reducing the number of channels employed in the parallel reconstruction from the M channel signals to a lower number of channel signals. In a specific embodiment, sensitivity map information can be used in the selection of the M channel signals to be used, and how the selected channel signals are to be combined, to create the output channel signals. In an embodiment, for a given set of radio-frequency (RF) elements, an optimal choice of reconstructed channel modes can be made using prior view information and/or sensitivity data for the given slice. The subject invention can utilize parallel imaging speed up in multiple directions.

    摘要翻译： 本发明涉及用于并行成像的方法和装置。 本方法可以利用利用并行成像技术的成像系统。 在具体实施方案中，本发明可用于磁共振成像（MRI）。 本发明的具体实施例可以通过将并行重建中采用的信道数量从M个信道信号减少到较少数量的信道信号来减少并行重建CPU和系统资源的使用。 在具体实施例中，灵敏度映射信息可以用于选择要使用的M个信道信号，以及如何组合所选择的信道信号，以产生输出信道信号。 在一个实施例中，对于给定的一组射频（RF）元件，可以使用给定切片的先前视图信息和/或灵敏度数据来进行重建信道模式的最佳选择。 本发明可以在多个方向上利用并行成像加速。

    Method for applying an in-painting technique to correct images in parallel imaging
    2.
    发明授权
    Method for applying an in-painting technique to correct images in parallel imaging 失效
    在平行成像中应用绘画技术校正图像的方法

    公开(公告)号：US07230429B1

    公开(公告)日：2007-06-12

    申请号：US11041904

    申请日：2005-01-24

    申请人： Feng Huang ,  G. Randy Duensing ,  Yunmei Chen

    发明人： Feng Huang ,  G. Randy Duensing ,  Yunmei Chen

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611

    摘要： The subject invention pertains to a method and apparatus for producing sensitivity maps with respect to medical imaging. The subject invention relates to a method for applying an inpainting model to correct images in parallel imaging. Some images, such as coil sensitivity maps and intensity correction maps, have no signal at some places and may have noise. Advantageously, the subject invention allows an accurate method to fill in holes in sensitivity maps, where holes can arise when, for example, the pixel intensity magnitudes for two images being used to create the sensitivity map are zero. A specific embodiment of the subject invention can accomplish de-noise, interpolation, and extrapolation simultaneously for these types of maps such that the local texture can be carefully protected.

    摘要翻译： 本发明涉及用于生成关于医学成像的灵敏度图的方法和装置。 本发明涉及一种用于应用修补模型以校正并行成像中的图像的方法。 一些图像，例如线圈灵敏度图和强度校正图，在某些地方没有信号并且可能具有噪声。 有利地，本发明允许精确的方法在灵敏度图中填充孔，其中例如当用于创建灵敏度图的两个图像的像素强度幅度为零时，可能出现孔。 本发明的具体实施例可以对这些类型的地图同时完成去噪声，插值和外插，使得可以仔细地保护局部纹理。

    Method and apparatus for reconstruction of an image in image space using basis functions (RIB) for partially parallel imaging
    3.
    发明申请
    Method and apparatus for reconstruction of an image in image space using basis functions (RIB) for partially parallel imaging 审中-公开
    用于使用用于部分并行成像的基函数（RIB）来重建图像空间中的图像的方法和装置

    公开(公告)号：US20080278165A1

    公开(公告)日：2008-11-13

    申请号：US12148367

    申请日：2008-04-18

    申请人： Yu Li ,  Feng Huang ,  G. Randy Duensing

    发明人： Yu Li ,  Feng Huang ,  G. Randy Duensing

    IPC分类号： G01R33/48

    CPC分类号： G01R33/5611

    摘要： Embodiments of the invention pertain to a method and apparatus for image reconstruction for parallel Magnetic Resonance Imaging (MRI). In a specific embodiment, a method for image reconstruction in image space is provided. The method can suppress aliasing caused by undersampling when the number of sampling lines in k-space is reduced to increase the imaging speed. In an embodiment, suppressing aliasing from under-sampling can improve the quality of images reconstructed from the data acquired using a MRI coil array. In an embodiment, the method operates in image space and achieves a good resolution. In the reconstruction, the sum of square errors can be minimized within a region of interest, which can allow the image reconstruction to be optimized in a particular imaging region of interest by sacrificing the reconstruction of other regions. In a further embodiment, image reconstruction can be implemented region by region, allowing global optimization by spending a longer time in reconstruction.

    摘要翻译： 本发明的实施例涉及用于并行磁共振成像（MRI）的图像重建的方法和装置。 在具体实施例中，提供了一种用于图像空间中的图像重建的方法。 当减小k空间中的采样线的数量以增加成像速度时，该方法可以抑制由欠采样引起的混叠。 在一个实施例中，抑制来自欠采样的混叠可以改善从使用MRI线圈阵列获取的数据重建的图像的质量。 在一个实施例中，该方法在图像空间中操作并且实现良好的分辨率。 在重建中，平方误差的和可以在感兴趣的区域内最小化，这可以允许通过牺牲其他区域的重建来在特定的感兴趣的成像区域中优化图像重建。 在另一个实施例中，图像重建可以逐个区域实现，从而通过在重建中花更长的时间来实现全局优化。

    Method and apparatus for noise tomography
    4.
    发明授权
    Method and apparatus for noise tomography 失效
    噪声层析成像方法和装置

    公开(公告)号：US06865494B2

    公开(公告)日：2005-03-08

    申请号：US10323135

    申请日：2002-12-18

    申请人： G. Randy Duensing ,  Charles Saylor ,  Feng Huang

    发明人： G. Randy Duensing ,  Charles Saylor ,  Feng Huang

    IPC分类号： A61B5/053 ,  A61B5/055 ,  G01R33/44 ,  G06F19/00

    CPC分类号： A61B5/0507 ,  A61B5/0536 ,  A61B5/055 ,  A61B2562/02 ,  A61B2562/046 ,  G01R33/44

    摘要： The subject invention pertains to an imaging technique and apparatus which can utilize an array of RF probes to measure the non-resonant thermal noise which is produced within a sample, such as a body, and produce a non-resonant thermal noise correlation. The detected noise correlation is a function of the spatial overlap of the electromagnetic fields of the probes and the spatial distribution of the conductivity of the sample. The subject technique, which can be referred to as Noise Tomography (NT), can generate a three-dimensional map of the conductivity of the sample. Since the subject invention utilizes detection of the thermal noise generated within the body, the subject method can be non-invasive and can be implemented without requiring external power, chemicals, or radionuclides to be introduced into the body. The subject imaging method can be used as a stand along technique or can be used in conjunction with other imaging techniques.

    摘要翻译： 本发明涉及一种成像技术和装置，其可以利用RF探针阵列来测量诸如身体之类的样品内产生的非共振热噪声并产生非共振热噪声相关性。 检测到的噪声相关性是探针的电磁场的空间重叠和样品的电导率的空间分布的函数。 可以称为噪声断层扫描（NT）的主题技术可以产生样品的电导率的三维图。 由于本发明利用了在身体内产生的热噪声的检测，所以本发明的方法可以是非侵入性的，并且可以在不需要将外部电源，化学物质或放射性核素引入体内的情况下实现。 主题成像方法可以用作支撑技术或可以与其他成像技术结合使用。

    Phantom for production of controllable fMRI signal
    5.
    发明授权
    Phantom for production of controllable fMRI signal 有权
    Phantom用于生产可控的fMRI信号

    公开(公告)号：US07215122B2

    公开(公告)日：2007-05-08

    申请号：US10957822

    申请日：2004-10-04

    申请人： Qun Zhao ,  G. Randy Duensing ,  Hu Cheng ,  William A. Edelstein

    发明人： Qun Zhao ,  G. Randy Duensing ,  Hu Cheng ,  William A. Edelstein

    IPC分类号： G01V3/00

    CPC分类号： G01R33/32 ,  G01R33/4806 ,  G01R33/58

    摘要： The subject invention relates to a method and apparatus for producing stimulated MRI data. In an embodiment, a remote-controlled “smart phantom” can produce simulated data. The simulated data can be acquired from a MRI system. The subject device can generate control signals and send the generated control signals to secondary coils/probes placed in the subject smart phantom. The control signals determine the current flow in the secondary coils/probes, which act as local spin magnetization amplifiers and thus produce regions of variable contrast to noise ratio. The control signals can be generated with various parameters, such as BOLD models, different levels of contrast-to-noise ratio (CNR), signal intensities, and physiological signals. Comparisons can be made with the widely-used simulated data by computers. Validation of the subject smart phantom can be performed with both theoretical analysis and data of human subjects.

    摘要翻译： 本发明涉及一种用于产生模拟MRI数据的方法和装置。 在一个实施例中，远程控制的“智能幻影”可以产生模拟数据。 可以从MRI系统获取模拟数据。 主体装置可以产生控制信号，并将产生的控制信号发送到放置在主体智能幻影中的次级线圈/探头。 控制信号确定次级线圈/探头中的电流，其作为局部自旋磁化放大器，从而产生可变对比度噪声比的区域。 控制信号可以用诸如BOLD模型，不同等级的对比噪声比（CNR），信号强度和生理信号等各种参数产生。 可以用计算机广泛使用的模拟数据进行比较。 可以通过理论分析和人类受试者的数据进行主体智能幻影的验证。

    METHOD AND APPARATUS FOR LOSSLESS OR LOW LOSS COUPLING FOR MANY CHANNEL RF COIL ARRAYS
    6.
    发明申请
    METHOD AND APPARATUS FOR LOSSLESS OR LOW LOSS COUPLING FOR MANY CHANNEL RF COIL ARRAYS 审中-公开
    用于多个通道RF线圈阵列的无损或低损耗耦合的方法和装置

    公开(公告)号：US20090224763A1

    公开(公告)日：2009-09-10

    申请号：US12330358

    申请日：2008-12-08

    申请人： G. Randy Duensing

    发明人： G. Randy Duensing

    IPC分类号： G01R33/34

    CPC分类号： G01R33/3415 ,  G01R33/3621 ,  G01R33/365

    摘要： Embodiments of the invention relate to methods and apparatus for lossless, or low loss, coupling for many channel RF coil arrays. Non-invertible noise can be converted to invertible noise. Specific embodiments pertain to methods and apparatus for magnetic resonance imaging (MRI) with many channel RF coil arrays. Specific embodiments pertain to methods and apparatus for matching one or more preamplifiers to associated coils in an MRI array and tuning the MRI coil array. Embodiments of the invention can incorporate matching of the coil to the impedance of the preamplifier.

    摘要翻译： 本发明的实施例涉及用于许多通道RF线圈阵列的无损或低损耗耦合的方法和装置。 不可逆噪声可以转换为可逆噪声。 具体实施方式涉及具有许多通道RF线圈阵列的磁共振成像（MRI）的方法和装置。 具体实施例涉及用于将一个或多个前置放大器与MRI阵列中的相关线圈相匹配并调谐MRI线圈阵列的方法和装置。 本发明的实施例可以结合线圈与前置放大器的阻抗的匹配。

    Method and apparatus for obtaining electrocardiogram (ECG) signals
    8.
    发明申请
    Method and apparatus for obtaining electrocardiogram (ECG) signals 审中-公开
    用于获得心电图（ECG）信号的方法和装置

    公开(公告)号：US20080154116A1

    公开(公告)日：2008-06-26

    申请号：US11644183

    申请日：2006-12-22

    申请人： G. Randy Duensing ,  Charles A. Saylor

    发明人： G. Randy Duensing ,  Charles A. Saylor

    IPC分类号： A61B5/0402 ,  A61B5/055

    CPC分类号： A61B5/0402 ,  A61B5/055

    摘要： Embodiments of the subject invention relate to a method and apparatus for obtaining an electrocardiogram (ECG) signal. Embodiments can separate a true ECG signal from one or more signals due to electric fields caused by moving electrical charges. In a specific embodiment, an ECG signal can be separated from one or more electric fields caused by blood flow. An embodiment pertains to a joint MRI and diagnostic ECG system. In an embodiment, the joint diagnostic quality ECG can add information to a MRI cardiac study. This additional information can be useful for MR guided intervention treatments, such as locating tissue that created bad electrical arrhythmia. In an embodiment, the subject method and apparatus can be utilized to obtain an ECG for patient located in a magnetic field of 1.5 T or higher, such as in MRI systems with 1.5 T or higher magnetic fields. Embodiments of the invention can use flow encoding with a changing magnetic field, with dense electrical sensors and inversion of the EEG data, utilizing this information to extract the flow related signals. Further, inversion to the source distribution of the flow related signals can be accomplished.

    摘要翻译： 本发明的实施例涉及一种用于获得心电图（ECG）信号的方法和装置。 实施例可以由于由移动电荷引起的电场而将真实ECG信号与一个或多个信号分离。 在具体实施例中，可以将ECG信号与由血流引起的一个或多个电场分离。 实施例涉及MRI和诊断ECG联合系统。 在一个实施例中，联合诊断质量ECG可以向MRI心脏研究添加信息。 这些附加信息可用于MR引导干预治疗，例如定位产生不良电气心律失常的组织。 在一个实施例中，本发明的方法和装置可以用于获得位于1.5T或更高的磁场中的患者的ECG，例如在具有1.5T或更高磁场的MRI系统中。 本发明的实施例可以使用具有变化的磁场的流动编码，具有密集的电传感器和EEG数据的反转，利用该信息来提取与流相关的信号。 此外，可以实现对流相关信号的源分布的反转。