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1. 发明授权

US08952693B2 Method for principal frequency magnetic resonance elastography inversion 有权
标题翻译：主频磁共振弹性成像反演方法
公开(公告)号：US08952693B2
公开(公告)日：2015-02-10
申请号：US13453653
申请日：2012-04-23
申请人： David S Lake , Kiaran P McGee , Armando Manduca , Yogesh K Mariappan , Richard L Ehman
发明人： David S Lake , Kiaran P McGee , Armando Manduca , Yogesh K Mariappan , Richard L Ehman
IPC分类号： G01R33/563
CPC分类号： G01R33/56358
摘要： A method for calculating a mechanical property of a material using a magnetic resonance imaging (“MRI”) system is provided. The method is particularly robust to image data having low signal-to-noise ratio (“SNR”). An MRI system is used to acquire magnetic resonance elastography (“MRE”) data from a subject containing the material. Exemplary materials include lung tissue. Images are reconstructed from the MRE data and used to produce a wave image from which a spatial frequency spectrum is produced. A principal frequency of the spatial frequency spectrum is produced and used to calculate a mechanical property of the material. For example, shear stiffness may be calculated.
摘要翻译：提供了使用磁共振成像（“MRI”）系统计算材料的机械特性的方法。该方法对具有低信噪比（“SNR”）的图像数据特别鲁棒。 MRI系统用于从包含材料的受试者获取磁共振弹性成像（“MRE”）数据。示例性材料包括肺组织。从MRE数据重建图像，并用于产生从其产生空间频谱的波形图像。产生空间频谱的主频率并用于计算材料的机械性能。例如，可以计算剪切刚度。

2. 发明授权

US09750426B2 System and method for assessing response to chemotherapy using magnetic resonance elastography 有权
公开(公告)号：US09750426B2
公开(公告)日：2017-09-05
申请号：US13301300
申请日：2011-11-21
申请人： Kiaran P McGee , Richard L Ehman , Stephen M Ansell , Yogesh K Mariappan , Jun Chen
发明人： Kiaran P McGee , Richard L Ehman , Stephen M Ansell , Yogesh K Mariappan , Jun Chen
IPC分类号： A61B5/055 , A61B5/00
CPC分类号： A61B5/055 , A61B5/0051
摘要： A system and method for determining a response of a tumor following a chemotherapy process includes the use of a magnetic resonance elastography (MRE) driver and a magnetic resonance imaging (MRI) system. The method includes controlling the MRE driver and the MRI system to acquire raw MRE data from the tumor, inverting the raw MRE data to produce an elastogram of the tumor, and determining a response of the tumor to the chemotherapy process from the elastogram.

3. 发明授权

US08508229B2 Shear mode pressure-activated driver for magnetic resonance elastography 有权
标题翻译：用于磁共振弹性成像的剪切模式压力驱动驱动器
公开(公告)号：US08508229B2
公开(公告)日：2013-08-13
申请号：US12847712
申请日：2010-07-30
申请人： Eric C Ehman , Kiaran P McGee , Richard L Ehman
发明人： Eric C Ehman , Kiaran P McGee , Richard L Ehman
IPC分类号： G01R33/565
CPC分类号： G01R33/56358
摘要： A magnetic resonance elastography (“MRE”) driver that can produce shear waves in a subject without relying on mode conversion of longitudinal waves is disclosed. More specifically, the MRE driver includes a pneumatic driver located remotely from a magnetic resonance imaging (“MRI”) system which is operable in response to an applied electrical current to oscillate, a pressure-activated driver that is positioned on a subject in the MRI system, and a tube that is in fluid communication, at one end, with the pneumatic driver. The pressure-activated driver includes a base plate and a driver plate having a region between them that receives the tube. Oscillations of the pneumatic driver produce a pressure wave in the tube that causes the driver plate to vibrate. The driver plate rests against the subject of interest to apply a corresponding shear oscillatory force to the subject during the MRE examination.
摘要翻译：公开了一种能够在不依赖纵波的模式转换的情况下在受试者中产生剪切波的磁共振弹性成像（“MRE”）驱动器。更具体地说，MRE驱动器包括一个位于远离磁共振成像（“MRI”）系统的气动驱动器，该系统可响应所施加的电流振荡而操作，压力激活的驱动器位于MRI中的受试者身上系统和一个管，其一端与气动驱动器流体连通。压力驱动的驱动器包括基板和驱动板，驱动板在它们之间具有容纳管的区域。气动驱动器的振动在管中产生压力波，导致驱动器板振动。驾驶员座椅抵靠感兴趣的主题，以在MRE检查期间向对象施加相应的剪切振荡力。

4. 发明授权

US08903151B2 System and method for assessing operation of an imaging system 有权
标题翻译：用于评估成像系统的操作的系统和方法
公开(公告)号：US08903151B2
公开(公告)日：2014-12-02
申请号：US13335080
申请日：2011-12-22
申请人： Zhonghao Bao , Scott O Stiving , Kiaran P McGee
发明人： Zhonghao Bao , Scott O Stiving , Kiaran P McGee
IPC分类号： G06K9/00 , G06K9/62
CPC分类号： G06K9/00214 , G06K9/6206
摘要： A system and method for assessing the operation of a imaging system, such as magnetic resonance imaging (MRI) system, is disclosed including a that computer is programmed to access an image of a phantom from image data, identify a plurality of seed point in the image of the phantom using a shape recognition algorithm, and rank combinations of the seed points using a pattern recognition algorithm using a priori information about the predefined pattern. The computer is programmed to rank the combinations of the seed points to generate an indication of an imaging quality characteristic of the imaging system.
摘要翻译：公开了一种用于评估诸如磁共振成像（MRI）系统的成像系统的操作的系统和方法，包括：该计算机被编程为从图像数据访问体模的图像，在图像数据中识别多个种子点使用形状识别算法的体模图像，以及使用使用关于预定图案的先验信息的模式识别算法对种子点进行排列组合。计算机被编程为对种子点的组合进行排序以产生成像系统的成像质量特性的指示。

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