专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20140107467A1 System And Method For Improved Efficiency In Magnetic Resonance Elastography 有权
标题翻译：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。

2. 发明授权

US06265874B1 Autocorrection of MR images using multiple metrics 有权
标题翻译：使用多个度量自动校正MR图像
公开(公告)号：US06265874B1
公开(公告)日：2001-07-24
申请号：US09576191
申请日：2000-05-23
申请人： Kiaran McGee , Joel P. Felmlee , Richard L. Ehman , Armando Manduca
发明人： Kiaran McGee , Joel P. Felmlee , Richard L. Ehman , Armando Manduca
IPC分类号： G01V300
CPC分类号： G01R33/56509 , G01R33/5673
摘要： An MRI image 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. Different metrics for evaluating image quality are used during the autocorrection process to take advantage of their different attributes.
摘要翻译：使用迭代自动校正过程来校正MRI图像，以进行修正，并测量所得到的重建图像的质量。在自动校正过程中使用用于评估图像质量的不同度量来利用其不同的属性。

3. 发明授权

US4715383A Method for reducing artifacts in NMR images 失效
标题翻译：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。

4. 发明申请

US20130119987A1 Spatially Coincident MRI Receiver Coils and Method For Manufacturing 有权
标题翻译：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。

5. 发明授权

US06469506B1 Autocorrection of MR images acquired using phased-array coils 有权
标题翻译：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。

6. 发明授权

US07678063B2 Motion monitor system for use with imaging systems 有权
标题翻译：运动监控系统用于成像系统
公开(公告)号：US07678063B2
公开(公告)日：2010-03-16
申请号：US11638162
申请日：2006-12-13
申请人： Joel P. Felmlee , Russell E. Bruhnke , Phillip Rossman , James P. Potter, Sr. , Stephanie K. Carlson
发明人： Joel P. Felmlee , Russell E. Bruhnke , Phillip Rossman , James P. Potter, Sr. , Stephanie K. Carlson
IPC分类号： A61B5/08
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。

7. 发明授权

US06307369B1 Autocorrection of 3D MR images for motion artifacts 有权
标题翻译：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。

8. 发明授权

US6037774A Inertial driver device for MR elastography 失效
标题翻译：用于MR弹性成像的惯性驱动装置
公开(公告)号：US6037774A
公开(公告)日：2000-03-14
申请号：US57405
申请日：1998-04-08
申请人： Joel P. Felmlee , Richard L. Ehman
发明人： Joel P. Felmlee , Richard L. Ehman
IPC分类号： A61B5/055 , G01R33/28 , G01R33/563 , G01V3/00
CPC分类号： G01R33/56358 , A61B5/0051 , A61B5/055 , A61B5/407 , G01R33/563
摘要： Devices for producing an oscillatory shear stress within an object positioned in a polarizing magnetic field of an NMR imaging system are used to perform MR elastography. In one embodiment shear stress is produced within the brain by vibrating the entire skull with a transducer that is gripped by the patient's teeth.
摘要翻译：用于在位于NMR成像系统的偏振磁场内的物体内产生振荡剪切应力的装置用于执行MR弹性成像。在一个实施例中，通过用患者的牙齿夹住的换能器振动整个头骨，在脑内产生剪切应力。

9. 发明授权

US5900732A Automatic windowing method for MR images 失效
标题翻译： MR图像的自动加窗方法
公开(公告)号：US5900732A
公开(公告)日：1999-05-04
申请号：US740800
申请日：1996-11-04
申请人： Joel P. Felmlee , William Ryan , Ramesh Avula , Bradley J. Erickson
发明人： Joel P. Felmlee , William Ryan , Ramesh Avula , Bradley J. Erickson
IPC分类号： G01R33/56 , G01V3/00
CPC分类号： G01R33/56 , G01R33/5608
摘要： An MRI system acquires NMR data and reconstructs an image. The image is enhanced prior to being displayed by automatically calculating a window level value and a window width value and mapping the reconstructed image through the resulting contrast window defined by those values.
摘要翻译： MRI系统获取NMR数据并重构图像。在通过自动计算窗口水平值和窗口宽度值来显示图像之前增强图像，并且通过由这些值定义的所得到的对比度窗口映射重建图像。

10. 发明授权

US4968935A Selective rephasing of NMR signals to suppress motion artifacts 失效
标题翻译： NMR信号的选择性重新定位以抑制运动伪影
公开(公告)号：US4968935A
公开(公告)日：1990-11-06
申请号：US405892
申请日：1989-09-11
申请人： Richard L. Ehman , Joel P. Felmlee
发明人： Richard L. Ehman , Joel P. Felmlee
IPC分类号： G01R33/567
CPC分类号： G01R33/56509
摘要： Motion artifacts are selectively suppressed in an image by correcting only the NMR data in the central views. The peripheral views are not corrected with the result that motion artifacts produced by large objects in the image are suppressed while motion artifacts produced by small objects are not. Consequently, the interior of small blood vessels remain darker in the reconstructed image.
摘要翻译：通过仅校正中央视图中的NMR数据，在图像中选择性地抑制运动伪像。周边视图不被校正，结果是由图像中的大对象产生的运动伪影被抑制，而由小对象产生的运动伪影不是。因此，重建图像中小血管内部保持较暗。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式