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公开(公告)号：US20060238193A1
公开(公告)日：2006-10-26
申请号：US11407960
申请日：2006-04-21
申请人： Timothy Roberts , Marshall Sussman
发明人： Timothy Roberts , Marshall Sussman
IPC分类号： G01V3/00
CPC分类号： G01R33/561 , G01R33/4824
摘要： Various embodiments are described herein for acquiring MRI image data from an object. Various waveforms are provided for producing magnetic field gradients and an RF excitation field such that NMR response signals are sampled according to a spiral-PR k-space trajectory having a plurality of angular sectors. A given angular sector can be defined by a sampling function having a period that defines radial sampling density and an envelope function that defines the angular extent of the angular sector. Various sampling and envelope functions can be used and a variety of values for the parameters for these functions can be used.
摘要翻译： 这里描述了用于从对象获取MRI图像数据的各种实施例。 提供用于产生磁场梯度和RF激励场的各种波形，使得根据具有多个角扇区的螺旋-PR k空间轨迹对NMR响应信号进行采样。 给定的角扇区可以由具有定义径向采样密度的周期的采样函数和限定角扇区的角度范围的包络函数来定义。 可以使用各种采样和包络函数，并且可以使用这些功能的参数的各种值。
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2.发明申请Device for enabling reduced motion-related artifacts in parallel magnetic resonance imaging 审中-公开用于在并行磁共振成像中实现减少运动相关假象的装置公开(公告)号：US20050134272A1
公开(公告)日：2005-06-23
申请号：US10995219
申请日：2004-11-24
申请人： Timothy Roberts , Marshall Sussman , Elissa Flagg
发明人： Timothy Roberts , Marshall Sussman , Elissa Flagg
IPC分类号： A61B5/055 , G01R33/20 , G01R33/3415 , G01R33/561 , G01V3/00
CPC分类号： G01R33/3415 , G01R33/5611
摘要： The present invention provides several embodiments of a device for physically separating RF imaging coils from any source of movement thereby minimizing potential coil-displacement related reconstruction effect or artifact. The device can be used to enable parallel imaging of the abdomen, pelvis and other moving body parts such that normal or abnormal patient movement does not displace the coil elements between the calibration scan and the subsequent imaging scans.
摘要翻译： 本发明提供了用于将RF成像线圈与任何移动源物理分离的装置的几个实施例，从而最小化潜在的线圈位移相关的重建效应或伪像。 该装置可用于使得能够平行成像腹部，骨盆和其他运动的身体部分，使得正常或异常的患者运动不会在校准扫描和随后的成像扫描之间移动线圈元件。
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公开(公告)号：US06292683B1
公开(公告)日：2001-09-18
申请号：US09313910
申请日：1999-05-18
IPC分类号： A61B5055
CPC分类号： G06T3/0075 , A61B5/055
摘要： The present invention relates to magnetic resonance imaging (MRI) and includes a method and apparatus to track motion of anatomy or medical instruments, for example, between MR images. The invention includes acquiring a time series of MR images of a region of interest, where the region of interest contains the anatomy or structure that is prone to movement, and the MR images contain signal intensity variations. The invention includes identifying a local reference region in the region of interest of a reference image and acquired from the time series. The local reference region of the reference image is compared to that of the other MR images and a translational displacement is determined between the local reference region of the reference image and of another MR image. The translational displacement has signal intensity invariance and can accurately track anatomy motion or the movement of a medical instrument during an invasive procedure. The translational displacement can be used to align the images for automatic registration, such as in myocardial perfusion imaging, MR angiography, fMRI, or in any other procedure in which motion tracking is advantageous. Two implementations of the invention are disclosed, one in which a correlation coefficient is calculated and used to determine the translational displacement, and one in which the images are converted to a binary image by thresholding and after computation of a filtered cross-correlation, a signal peak is located and plotted as the translational displacement.
摘要翻译： 本发明涉及磁共振成像（MRI），并且包括用于跟踪例如在MR图像之间的解剖或医疗器械的运动的方法和装置。 本发明包括获取感兴趣区域的MR图像的时间序列，其中感兴趣区域包含易于移动的解剖结构或结构，并且MR图像包含信号强度变化。 本发明包括识别参考图像的感兴趣区域并从时间序列中获取的局部参考区域。 将参考图像的局部参考区域与其他MR图像的局部参考区域进行比较，并且在参考图像的局部参考区域和另一MR图像之间确定平移位移。 平移位移具有信号强度不变性，可以在侵入性过程中精确跟踪解剖运动或医疗器械的运动。 平移位移可以用于对准用于自动对准的图像，例如在心肌灌注成像，MR血管造影术，fMRI或其中运动跟踪是有利的任何其他过程中。 公开了本发明的两个实施例，其中计算相关系数并用于确定平移位移，并且其中图像通过阈值处理和在滤波的互相关的计算之后被转换成二进制图像，其中信号 峰位于并绘制为平移位移。
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公开(公告)号：US20110280456A1
公开(公告)日：2011-11-17
申请号：US12947256
申请日：2010-11-16
IPC分类号： G06K9/00
CPC分类号： G01R33/5608 , G01R33/543 , G01R33/5616 , G01R33/5617
摘要： A method, system and user interface for synthetic image generation for magnetic resonance (MR) imaging is described. A plurality of MR imaging data sets is received, each data set being acquired at a different value for a MR acquisition parameter. A response value for a particular property of tissues is determined, based on a calculated fit of each pixel to a property response model. A synthetic image is generated for a selected value of the MR acquisition parameter, based on the determined response value. An option is provided to dynamically change the selected value of the MR acquisition parameter and the synthetic image is re-generated for the changed value. An option may be provided to dynamically change the value. Another option may be provided to calculate a reliability measure for the synthetic image.
摘要翻译： 描述了用于磁共振（MR）成像的合成图像生成的方法，系统和用户界面。 接收多个MR成像数据组，每个数据集以不同的值获取用于MR采集参数。 基于每个像素对属性响应模型的计算拟合来确定组织的特定属性的响应值。 基于确定的响应值为MR获取参数的选定值生成合成图像。 提供了一种选项来动态地改变MR采集参数的选定值，并为改变的值重新生成合成图像。 可以提供一个选项来动态地改变该值。 可以提供另一种选择来计算合成图像的可靠性度量。
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公开(公告)号：US08355556B2
公开(公告)日：2013-01-15
申请号：US12947256
申请日：2010-11-16
IPC分类号： G06K9/00
CPC分类号： G01R33/5608 , G01R33/543 , G01R33/5616 , G01R33/5617
摘要： A method, system and user interface for synthetic image generation for magnetic resonance (MR) imaging is described. A plurality of MR imaging data sets is received, each data set being acquired at a different value for a MR acquisition parameter. A response value for a particular property of tissues is determined, based on a calculated fit of each pixel to a property response model. A synthetic image is generated for a selected value of the MR acquisition parameter, based on the determined response value. An option is provided to dynamically change the selected value of the MR acquisition parameter and the synthetic image is re-generated for the changed value. An option may be provided to dynamically change the value. Another option may be provided to calculate a reliability measure for the synthetic image.
摘要翻译： 描述了用于磁共振（MR）成像的合成图像生成的方法，系统和用户界面。 接收多个MR成像数据组，每个数据集以不同的值获取用于MR采集参数。 基于每个像素对属性响应模型的计算拟合来确定组织的特定属性的响应值。 基于确定的响应值为MR获取参数的选定值生成合成图像。 提供了一种选项来动态地改变MR采集参数的选定值，并为改变的值重新生成合成图像。 可以提供一个选项来动态地改变该值。 可以提供另一种选择来计算合成图像的可靠性度量。
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公开(公告)号：US20060244445A1
公开(公告)日：2006-11-02
申请号：US11115308
申请日：2005-04-27
IPC分类号： G01V3/00
CPC分类号： G01R33/565 , G01R33/56391 , G01R33/5676
摘要： An MRI system and method for acquiring motion-compensated MR image data of an object. The MRI system includes an MRI device for generating a uniform magnetic field through the object, magnetic field gradients for imaging a portion of the object and an RF excitation field for evoking NMR response signals from the object; a computer for controlling the operation of the MRI system; a motion compensation module for generating a plurality of navigator waveforms for evoking a corresponding plurality of navigator echoes from the portion of the object while the object is being imaged, and processing the plurality of navigator echoes by determining a subset of similar navigator echoes and removing rigid-body translation from the NMR response signals associated with the subset of similar navigator echoes; and, interface circuitry for generating the magnetic gradient, RF and navigator waveforms and sampling the NMR response signals and the plurality of navigator echoes.
摘要翻译： 用于获取物体的运动补偿MR图像数据的MRI系统和方法。 MRI系统包括用于通过物体产生均匀磁场的MRI装置，用于对物体的一部分进行成像的磁场梯度和用于从物体引起NMR响应信号的RF激励场; 用于控制MRI系统的操作的计算机; 一种运动补偿模块，用于产生多个导航波形，用于在对象被成像时从对象的该部分引起相应的多个导航回波，以及通过确定类似的导航回波的子集并去除刚性来处理多个导航回波 从与类似导航回波的子集相关联的NMR响应信号中翻译; 以及用于产生磁梯度的接口电路，RF和导航波形以及对NMR响应信号和多个导航回波的采样。
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7.发明申请Magnetic resonance imaging using direct, continuous real-time imaging for motion compensation 有权磁共振成像采用直接连续实时成像进行运动补偿公开(公告)号：US20050073305A1
公开(公告)日：2005-04-07
申请号：US10653282
申请日：2003-09-03
IPC分类号： G01R33/565 , G01R33/567 , G01V3/00
CPC分类号： G01R33/5676 , G01R33/56325
摘要： Magnetic resonance imaging (MRI) uses direct, continuous, unaliased, real-time imaging for motion compensation. Unaliased, real-time two dimensional (2D) images are acquired continuously of the anatomy of interest. The images are compared to at least one template to using a correlation coefficient technique to select images corresponding to minimal motion and distortion. A spatial grid of templates can be used to cover an anatomy of interest. Multiple temporal templates can be used to create a time series of magnetic resonance (MR) images. The selected images are used to provide a high-resolution image, preferably a three dimensional (3D) image.
摘要翻译： 磁共振成像（MRI）使用直接，连续，不间断的实时成像进行运动补偿。 不间断的实时二维（2D）图像被连续获取感兴趣的解剖结构。 将图像与至少一个模板进行比较，以使用相关系数技术来选择对应于最小运动和失真的图像。 模板的空间网格可以用于覆盖感兴趣的解剖结构。 可以使用多个时间模板来创建磁共振（MR）图像的时间序列。 所选择的图像用于提供高分辨率图像，优选三维（3D）图像。
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