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18 条记录 (耗时 0.025 秒)

    Motion monitor system for use with imaging systems
    2.
    发明申请
    Motion monitor system for use with imaging systems 有权
    运动监控系统用于成像系统

    公开(公告)号：US20070172029A1

    公开(公告)日：2007-07-26

    申请号：US11638162

    申请日：2006-12-13

    申请人： Joel P. Felmlee ,  Russell E. Bruhnke ,  Phillip Rossman ,  James P. Potter

    发明人： Joel P. Felmlee ,  Russell E. Bruhnke ,  Phillip Rossman ,  James P. Potter

    IPC分类号： H05G1/10

    CPC分类号： A61B5/1135 ,  A61B5/7285 ,  A61B6/504 ,  A61B6/541

    摘要： A bellows-based patient breath-hold monitoring and feedback system for use in intermittent mode CT fluoroscopy-guided biopsies of the lung or upper abdomen where respiratory motion is a problem. Breath-hold monitoring and feedback with the bellows system allows a patient to perform consistent breath-holds at a preselected level, which in turn, optimizes intermittent mode CT fluoroscopy-guided biopsies of the lung or upper abdomen by allowing target lesions to be reliably visualized.

    摘要翻译： 一种基于波纹管的患者呼吸监测和反馈系统，用于间歇模式CT荧光透视引导的肺或上腹部活检，呼吸运动是一个问题。 使用波纹管系统进行呼吸保持监测和反馈允许患者以预先选择的水平执行一致的呼吸保持，这进而优化通过允许目标病变可靠地可视化来显示肺或上腹部的间歇模式CT透视图引导的活组织检查 。

    System And Method For Improved Efficiency In Magnetic Resonance Elastography
    3.
    发明申请
    System And Method For Improved Efficiency In Magnetic Resonance Elastography 有权
    在磁共振弹性成像中提高效率的系统和方法

    公开(公告)号：US20140107467A1

    公开(公告)日：2014-04-17

    申请号：US14049632

    申请日：2013-10-09

    申请人： Joel P. Felmlee ,  Richard L. Ehman ,  Matthew C. Murphy

    发明人： Joel P. Felmlee ,  Richard L. Ehman ,  Matthew C. Murphy

    IPC分类号： G01R33/48 ,  A61B5/055 ,  A61B5/00 ,  A61B8/08

    CPC分类号： G01R33/4814 ,  A61B5/0035 ,  A61B5/055 ,  A61B5/725 ,  A61B5/7278 ,  A61B8/485 ,  G01R33/56358

    摘要： A system and method for generating a magnetic resonance elastography (MRE) report includes a) acquiring MRE data from a subject including positively motion encoded medical imaging data and negatively motion encoded medical imaging data and b) deriving uncorrected difference medical imaging data from the MRE data for a given slice. The method also includes c) filtering the uncorrected difference medical imaging data to create filtered medical imaging data corrected for errors associated with phase ramps occurring during gradient switching used to derive the positively motion encoded medical imaging data and negatively motion encoded medical imaging data, d) generating a corrected difference image for the given slice from the filtered medical imaging data and the uncorrected difference medical imaging data, e) repeating steps b) through d) for each slice reflected in the MRE data, and f) generating a report of elastic properties of the subject from the corrected difference image.

    摘要翻译： 用于产生磁共振弹性成像（MRE）报告的系统和方法包括：a）从主体获取MRE数据，包括正运动编码的医学成像数据和负运动编码的医学成像数据，以及b）从MRE数据导出未校正的差分医学成像数据 对于给定的切片。 该方法还包括：c）对未校正的差分医学成像数据进行滤波，以产生针对与用于导出正运动编码的医学成像数据和负运动编码的医学成像数据的梯形切换期间发生的相位斜坡相关的误差校正的滤波的医学成像数据，d） 从经滤波的医学成像数据和未校正的差分医学成像数据生成针对给定切片的校正差分图像，e）对在MRE数据中反映的每个切片重复步骤b）至d），以及f）生成弹性特性报告 从修正后的差分图像中获取。

    Method for reducing artifacts in NMR images
    5.
    发明授权
    Method for reducing artifacts in NMR images 失效
    减少核磁共振图像中伪像的方法

    公开(公告)号：US4715383A

    公开(公告)日：1987-12-29

    申请号：US928504

    申请日：1986-11-10

    申请人： Richard L. Ehman ,  Joel P. Felmlee

    发明人： Richard L. Ehman ,  Joel P. Felmlee

    IPC分类号： G01R33/483 ,  G01R33/561 ,  G01R33/565 ,  G01R33/567 ,  A61B5/05

    CPC分类号： G01R33/56509 ,  G01R33/561 ,  G01R33/4838 ,  G01R33/56545

    摘要： A method for eliminating flow, motion and aliasing artifacts includes a series of saturation pulse sequences which are interleaved with the NMR pulse sequences used to acquire the data needed to reconstruct the desired image. Whereas, the NMR pulse sequences extract data from the volume of interest to be imaged, the saturation pulse sequences excite and saturate spins in the adjacent regions.

    摘要翻译： 用于消除流动，运动和混叠伪像的方法包括一系列饱和脉冲序列，其与用于获取重建所需图像所需的数据的NMR脉冲序列交错。 然而，NMR脉冲序列从要成像的感兴趣体积中提取数据，饱和脉冲序列激发并使相邻区域中的自旋饱和。

    Spatially Coincident MRI Receiver Coils and Method For Manufacturing
    6.
    发明申请
    Spatially Coincident MRI Receiver Coils and Method For Manufacturing 有权
    空间重合MRI接收器线圈和制造方法

    公开(公告)号：US20130119987A1

    公开(公告)日：2013-05-16

    申请号：US13674654

    申请日：2012-11-12

    申请人： Joel P. Felmlee

    发明人： Joel P. Felmlee

    IPC分类号： G01R33/34

    CPC分类号： G01R33/34092 ,  G01R33/34007 ,  G01R33/341 ,  G01R33/3415

    摘要： A magnetic resonance imaging receiver coil provides for high SNR and high uniformity over a range of loading conditions with layers, or stacks, of independent conductive elements. The plurality of layers preload the receiver coil reducing the circuit variation as the subject coupling and loading varies. The preload is such that coil performance, or SNR, is maintained over a large range of impedance variation. This configuration is designed to exceed the performance of single trace coils over a range of impedance consistent with variations associated with different subjects, and may also incorporate coils of different resonance frequencies.

    摘要翻译： 磁共振成像接收器线圈在具有独立导电元件的层或堆叠的一系列负载条件下提供高SNR和高均匀性。 当主体耦合和负载变化时，多个层预加载接收器线圈减小电路变化。 预加载使得线圈性能或SNR保持在较大的阻抗变化范围内。 该配置被设计为超过了与不同主题相关联的变化的阻抗范围内的单个迹线线圈的性能，并且还可以包括不同谐振频率的线圈。

    Autocorrection of MR images acquired using phased-array coils
    7.
    发明授权
    Autocorrection of MR images acquired using phased-array coils 有权
    使用相控阵线圈获得的MR图像的自动校正

    公开(公告)号：US06469506B1

    公开(公告)日：2002-10-22

    申请号：US09595272

    申请日：2000-06-15

    申请人： Joel P. Felmlee ,  Kiaran P. McGee ,  Richard L. Ehman ,  Armando Manduca

    发明人： Joel P. Felmlee ,  Kiaran P. McGee ,  Richard L. Ehman ,  Armando Manduca

    IPC分类号： G01V300

    CPC分类号： G01R33/3415

    摘要： An MRI image acquired with a phase-array coil is corrected for motion artifacts using an iterative, autocorrection process in which corrections are tried and the quality of the resulting reconstructed image is measured. In one embodiment autocorrections are calculated for the data acquired with one coil element and the same corrections are made to data acquired with the other coil elements. In another embodiment autocorrections are calculated separately for the data acquired with each coil element. In either embodiment, the separate corrected images are combined to form the output image.

    摘要翻译： 用相位阵列线圈获取的MRI图像使用迭代自动校正过程来校正运动伪像，其中尝试校正并测量所得到的重建图像的质量。 在一个实施例中，对于用一个线圈元件获取的数据计算自动校正，并且对与其它线圈元件获取的数据进行相同的校正。 在另一个实施例中，为每个线圈元件采集的数据分别计算自动校正。 在任一实施例中，组合分离的校正图像以形成输出图像。

    Autocorrection of 3D MR images for motion artifacts
    8.
    发明授权
    Autocorrection of 3D MR images for motion artifacts 有权
    自动校正运动伪像的三维MR图像

    公开(公告)号：US06307369B1

    公开(公告)日：2001-10-23

    申请号：US09614893

    申请日：2000-07-12

    申请人： Joel P. Felmlee ,  Kiaran P. McGee ,  Richard L. Ehman ,  Armando Manduca

    发明人： Joel P. Felmlee ,  Kiaran P. McGee ,  Richard L. Ehman ,  Armando Manduca

    IPC分类号： G01V300

    CPC分类号： G01R33/56509 ,  G01R33/4822 ,  G01R33/5673

    摘要： A three-dimensional image data set is acquired with an MRI system and autocorrected to reduce artifacts caused by subject motion during image acquisition. Correction for motion along one or two axes is performed by selecting a 2D slice of data and autocorrecting it to produce phase corrections that are then made to the entire 3D image data set. This may be repeated by autocorrecting an additional 2D slice perpendicular to the first 2D slice to produce phase corrections for the 3D image data set for motion along the third axis.

    摘要翻译： 利用MRI系统获取三维图像数据集并进行自动校正，以减少在图像采集期间由被摄体运动引起的伪像。 通过选择2D切片数据并对其进行自动校正来执行沿着一个或两个轴的运动的校正，以产生对整个3D图像数据集进行相位校正。 这可以通过自动校正垂直于第一2D切片的附加2D切片来重复，以产生用于沿着第三轴的运动的3D图像数据集的相位校正。