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1. 发明授权

US07375526B2 Active-passive electromagnetic shielding to reduce MRI acoustic noise 失效
标题翻译：主动被动电磁屏蔽减少MRI声学噪声
公开(公告)号：US07375526B2
公开(公告)日：2008-05-20
申请号：US11551413
申请日：2006-10-20
申请人： William A. Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
发明人： William A. Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
IPC分类号： G01V3/00
CPC分类号： G01R33/3854 , G01R33/4215
摘要： The present invention provides an apparatus for reducing acoustic noise in a magnetic resonance imaging device including passive shielding located outside the actively shielded gradient winding elements in order to reduce the magnitude of fields that spread outside the gradient coil assembly in unwanted directions and interact with the magnet cryostat or other metallic magnet parts, inducing eddy currents that cause consequent acoustic noise. The passive shielding elements are conducting layers located on the outer radius of the cylindrical gradient coil assembly in a cylindrical magnet system, conducting layers located at the ends of the gradient coil assembly in a cylindrical magnet system, and conducting layers located inside the actively shielded gradient winding inner elements in a cylindrical magnet system. The passive shielding could also be located on separate structures that are vibrationally isolated from the magnet cryostat. The actively shielded gradient winding can also be extended to portions at the ends of the actively shielded gradient winding and further to portions inside the inner radius of the inner portion of the actively shielded gradient winding. The actively shielded gradient windings and passive shielding should be designed concurrently in order to substantially optimize the gradient linearity and reduce the eddy currents generated in metallic parts of the magnetic resonance imaging system.
摘要翻译：本发明提供了一种用于降低磁共振成像装置中的声学噪声的装置，其包括位于主动屏蔽的梯度绕组元件外部的无源屏蔽，以便减少在不需要的方向上扩展到梯度线圈组件外部的场的大小并与磁体相互作用低温恒温器或其他金属磁体部件，引起导致声音噪声的涡流。无源屏蔽元件是位于圆柱形磁体系统中的圆柱形梯度线圈组件的外半径上的导电层，位于梯形线圈组件的端部的导电层位于圆柱形磁体系统中，导电层位于主动屏蔽梯度内在圆柱形磁体系中缠绕内部元件。被动屏蔽也可以位于与磁体低温恒温器振动隔离的分离结构上。主动屏蔽的梯度绕组还可以延伸到主动屏蔽的梯度绕组的端部的部分，并且还可以延伸到主动屏蔽的梯度绕组的内部的内半径内的部分。主动屏蔽梯度绕组和无源屏蔽应同时设计，以便基本上优化梯度线性并减少在磁共振成像系统的金属部分中产生的涡流。

2. 发明授权

US07141974B2 Active-passive electromagnetic shielding to reduce MRI acoustic noise 有权
标题翻译：主动被动电磁屏蔽减少MRI声学噪声
公开(公告)号：US07141974B2
公开(公告)日：2006-11-28
申请号：US10925691
申请日：2004-08-25
申请人： William A Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
发明人： William A Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
IPC分类号： G01V3/00
CPC分类号： G01R33/3854 , G01R33/4215
摘要： The present invention provides an apparatus for reducing acoustic noise in a magnetic resonance imaging device including passive shielding located outside the actively shielded gradient winding elements in order to reduce the magnitude of fields that spread outside the gradient coil assembly in unwanted directions and interact with the magnet cryostat or other metallic magnet parts, inducing eddy currents that cause consequent acoustic noise. The passive shielding elements are conducting layers located on the outer radius of the cylindrical gradient coil assembly in a cylindrical magnet system, conducting layers located at the ends of the gradient coil assembly in a cylindrical magnet system, and conducting layers located inside the actively shielded gradient winding inner elements in a cylindrical magnet system. The passive shielding could also be located on separate structures that are vibrationally isolated from the magnet cryostat. The actively shielded gradient winding can also be extended to portions at the ends of the actively shielded gradient winding and further to portions inside the inner radius of the inner portion of the actively shielded gradient winding. The actively shielded gradient windings and passive shielding should be designed concurrently in order to substantially optimize the gradient linearity and reduce the eddy currents generated in metallic parts of the magnetic resonance imaging system.
摘要翻译：本发明提供了一种用于降低磁共振成像装置中的声学噪声的装置，其包括位于主动屏蔽梯度绕组元件外部的无源屏蔽，以便减小在不需要的方向上扩展到梯度线圈组件外部的场的幅度并与磁体相互作用低温恒温器或其他金属磁体部件，引起导致声音噪声的涡流。无源屏蔽元件是位于圆柱形磁体系统中的圆柱形梯度线圈组件的外半径上的导电层，位于梯形线圈组件的端部的导电层位于圆柱形磁体系统中，导电层位于主动屏蔽梯度内在圆柱形磁体系中缠绕内部元件。被动屏蔽也可以位于与磁体低温恒温器振动隔离的分离结构上。主动屏蔽的梯度绕组还可以延伸到主动屏蔽的梯度绕组的端部的部分，并且还可以延伸到主动屏蔽的梯度绕组的内部的内半径内的部分。主动屏蔽梯度绕组和无源屏蔽应同时设计，以便基本上优化梯度线性并减少在磁共振成像系统的金属部分中产生的涡流。

3. 发明申请

US20080094062A1 ACTIVE-PASSIVE ELECTROMAGNETIC SHIELDING TO REDUCE MRI ACOUSTIC NOISE 失效
标题翻译：主动被动电磁屏蔽减少MRI声音噪声
公开(公告)号：US20080094062A1
公开(公告)日：2008-04-24
申请号：US11551413
申请日：2006-10-20
申请人： William A. Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
发明人： William A. Edelstein , Tesfaye K. Kidane , Victor Taracilla , Tanvir N. Baig , Timothy P. Eagan , Robert W. Brown
IPC分类号： G01V3/00
CPC分类号： G01R33/3854 , G01R33/4215
摘要： The present invention provides an apparatus for reducing acoustic noise in a magnetic resonance imaging device including passive shielding located outside the actively shielded gradient winding elements in order to reduce the magnitude of fields that spread outside the gradient coil assembly in unwanted directions and interact with the magnet cryostat or other metallic magnet parts, inducing eddy currents that cause consequent acoustic noise. The passive shielding elements are conducting layers located on the outer radius of the cylindrical gradient coil assembly in a cylindrical magnet system, conducting layers located at the ends of the gradient coil assembly in a cylindrical magnet system, and conducting layers located inside the actively shielded gradient winding inner elements in a cylindrical magnet system. The passive shielding could also be located on separate structures that are vibrationally isolated from the magnet cryostat. The actively shielded gradient winding can also be extended to portions at the ends of the actively shielded gradient winding and further to portions inside the inner radius of the inner portion of the actively shielded gradient winding. The actively shielded gradient windings and passive shielding should be designed concurrently in order to substantially optimize the gradient linearity and reduce the eddy currents generated in metallic parts of the magnetic resonance imaging system.
摘要翻译：本发明提供了一种用于降低磁共振成像装置中的声学噪声的装置，其包括位于主动屏蔽梯度绕组元件外部的无源屏蔽，以便减小在不需要的方向上扩展到梯度线圈组件外部的场的幅度并与磁体相互作用低温恒温器或其他金属磁体部件，引起导致声音噪声的涡流。无源屏蔽元件是位于圆柱形磁体系统中的圆柱形梯度线圈组件的外半径上的导电层，导电层位于梯形线圈组件的圆柱形磁体系统的端部，导电层位于主动屏蔽梯度内在圆柱形磁体系中缠绕内部元件。被动屏蔽也可以位于与磁体低温恒温器振动隔离的分离结构上。主动屏蔽的梯度绕组还可以延伸到主动屏蔽的梯度绕组的端部的部分，并且还可以延伸到主动屏蔽的梯度绕组的内部的内半径内的部分。主动屏蔽梯度绕组和无源屏蔽应同时设计，以便基本上优化梯度线性并减少在磁共振成像系统的金属部分中产生的涡流。

4. 发明授权

US09472000B2 System and method for performing tomographic image acquisition and reconstruction 有权
标题翻译：用于执行断层图像采集和重建的系统和方法
公开(公告)号：US09472000B2
公开(公告)日：2016-10-18
申请号：US12817846
申请日：2010-06-17
申请人： James F. Dempsey , Qingguo Zeng , Roger Nana , John L. Patrick , Timothy P. Eagan , Shmaryu M. Shvartsman
发明人： James F. Dempsey , Qingguo Zeng , Roger Nana , John L. Patrick , Timothy P. Eagan , Shmaryu M. Shvartsman
IPC分类号： G06K9/00 , G06T11/00 , G01R33/48 , G01R33/561 , G01R33/56
CPC分类号： G06T11/006 , G01R33/4826 , G01R33/5608 , G01R33/5611 , G06T7/0012 , G06T2211/424
摘要： Systems and methods for tomographic reconstruction of an image include systems and methods for producing images from k-space data. A k-space data set of an imaged object is acquired using know k-space data acquisition systems and methods. A portion of the k-space data set is sampled so as to collect some portion of the k-space data. An image is then reconstructed from the collected portion of the k-space data set according to a convex optimization model.
摘要翻译：用于图像的层析重建的系统和方法包括用于从k空间数据产生图像的系统和方法。使用已知的k空间数据采集系统和方法获取成像对象的k空间数据集。对k空间数据集的一部分进行采样，以收集k空间数据的一部分。然后根据凸优化模型从k空间数据集的收集部分重建图像。

5. 发明申请

US20100322497A1 SYSTEM AND METHOD FOR PERFORMING TOMOGRAPHIC IMAGE ACQUISITION AND RECONSTRUCTION 有权
标题翻译：用于执行图像图像获取和重建的系统和方法
公开(公告)号：US20100322497A1
公开(公告)日：2010-12-23
申请号：US12817846
申请日：2010-06-17
申请人： James F. Dempsey , Qingguo Zeng , Roger Nana , John L. Patrick , Timothy P. Eagan , Shmaryu M. Shvartsman
发明人： James F. Dempsey , Qingguo Zeng , Roger Nana , John L. Patrick , Timothy P. Eagan , Shmaryu M. Shvartsman
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G01R33/4826 , G01R33/5608 , G01R33/5611 , G06T7/0012 , G06T2211/424
摘要： Systems and methods for tomographic reconstruction of an image include systems and methods for producing images from k-space data. A k-space data set of an imaged object is acquired using know k-space data acquisition systems and methods. A portion of the k-space data set is sampled so as to collect some portion of the k-space data. An image is then reconstructed from the collected portion of the k-space data set according to a convex optimization model.
摘要翻译：用于图像的层析重建的系统和方法包括用于从k空间数据产生图像的系统和方法。使用已知的k空间数据采集系统和方法获取成像对象的k空间数据集。对k空间数据集的一部分进行采样，以收集k空间数据的一部分。然后根据凸优化模型从k空间数据集的收集部分重建图像。

6. 发明申请

US20100290683A1 MR-PET CYCLIC MOTION GATING AND CORRECTION 有权
标题翻译： MR-PET循环运动增益和校正
公开(公告)号：US20100290683A1
公开(公告)日：2010-11-18
申请号：US12740358
申请日：2008-10-29
申请人： Gordon D. Demeester , Michael A. Morich , Timothy P. Eagan
发明人： Gordon D. Demeester , Michael A. Morich , Timothy P. Eagan
IPC分类号： G06K9/00
CPC分类号： G01R33/481 , A61B5/0035 , A61B5/0402 , A61B5/055 , A61B5/08 , A61B5/7289 , A61B5/7292 , A61B6/037 , A61B6/5247 , A61B6/5288 , A61B6/541 , G01R33/56509 , G01R33/5673 , G01R33/5676
摘要： In preparation for acquiring PET image data, subject motion models are built based on physiologic signal monitoring and MR data is collected and used for improved PET imaging. The physiologic signal monitoring is also used during PET imaging, and the acquired MR data is used for prospective or retrospective gating of the PET image acquisition, or in the PET reconstruction for improved correction/imaging.
摘要翻译：为准备获取PET图像数据，基于生理信号监测建立主题运动模型，收集MR数据并用于改进PET成像。生物信号监测也用于PET成像，采集的MR数据用于PET图像采集的前瞻性或回顾性门控，或PET重建中用于改善校正/成像。

7. 发明授权

US09535145B2 MR-PET cyclic motion gating and correction 有权
标题翻译： MR-PET循环运动门控和校正
公开(公告)号：US09535145B2
公开(公告)日：2017-01-03
申请号：US12740358
申请日：2008-10-29
申请人： Gordon D. Demeester , Michael A. Morich , Timothy P. Eagan
发明人： Gordon D. Demeester , Michael A. Morich , Timothy P. Eagan
IPC分类号： G06Q10/00 , G06Q50/00 , G01R33/48 , A61B6/03 , A61B6/00 , G01R33/567 , A61B5/055 , A61B5/0402 , A61B5/08 , A61B5/00 , G01R33/565
CPC分类号： G01R33/481 , A61B5/0035 , A61B5/0402 , A61B5/055 , A61B5/08 , A61B5/7289 , A61B5/7292 , A61B6/037 , A61B6/5247 , A61B6/5288 , A61B6/541 , G01R33/56509 , G01R33/5673 , G01R33/5676
摘要： In preparation for acquiring PET image data, subject motion models are built based on physiologic signal monitoring and MR data is collected and used for improved PET imaging. The physiologic signal monitoring is also used during PET imaging, and the acquired MR data is used for prospective or retrospective gating of the PET image acquisition, or in the PET reconstruction for improved correction/imaging.
摘要翻译：为准备获取PET图像数据，基于生理信号监测建立主题运动模型，收集MR数据并用于改进PET成像。生物信号监测也用于PET成像，采集的MR数据用于PET图像采集的前瞻性或回顾性门控，或PET重建中用于改善校正/成像。

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