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51.发明申请Method and System for Correction of Lung Density Variation in Positron Emission Tomography Using Magnetic Resonance Imaging 有权使用磁共振成像校正正电子发射断层扫描肺密度变化的方法和系统公开(公告)号：US20140079304A1
公开(公告)日：2014-03-20
申请号：US13618079
申请日：2012-09-14
申请人： Thomas Kwok-Fah Foo , Christopher Judson Hardy , Albert Henry Roger Lonn , Ravindra Mohan Manjeshwar , Dattesh Dayanand Shanbhag , Sheshadri Thiruvenkadam
发明人： Thomas Kwok-Fah Foo , Christopher Judson Hardy , Albert Henry Roger Lonn , Ravindra Mohan Manjeshwar , Dattesh Dayanand Shanbhag , Sheshadri Thiruvenkadam
IPC分类号： G06K9/00
CPC分类号： G06T11/008 , G06T7/11 , G06T7/12 , G06T2207/10088 , G06T2207/10104 , G06T2207/20221 , G06T2207/30061
摘要： Exemplary embodiments of the present disclosure are directed to correcting lung density variations in positron emission tomography (PET) images of a subject using a magnetic resonance (MR) image. A pulmonary vasculature and an outer extent of a lung cavity can be identified in a MR image corresponding to a thoracic region of the subject in response to an intensity associated with pixels in the MR image. The pixels within the outer extent of the lung cavity are classified as corresponding to the pulmonary vasculature or the lung tissue. Exemplary embodiments of the present disclosure can apply attenuation coefficients to a reconstruction of the PET image based on the classification of the pixels within the outer extent of the lung cavity.
摘要翻译： 本公开的示例性实施例涉及使用磁共振（MR）图像校正受试者的正电子发射断层摄影（PET）图像中的肺密度变化。 响应于与MR图像中的像素相关联的强度，可以在对应于受试者的胸部区域的MR图像中识别肺部脉管系统和肺腔的外部范围。 肺腔外部范围内的像素被分类为对应于肺血管或肺组织。 本公开的示例性实施例可以基于肺腔外部范围内的像素的分类，将衰减系数应用于PET图像的重建。
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公开(公告)号：US20130320981A1
公开(公告)日：2013-12-05
申请号：US13484816
申请日：2012-05-31
CPC分类号： G01R33/34084 , G01R33/34007 , G01R33/3415 , H01F5/003 , H01F2017/006 , Y10T29/49073
摘要： An imaging system is presented. The imaging system includes a cradle, and a first sheet of coils disposed inside of the cradle such that a first end of the first sheet of coils protrudes out of the cradle and a second end of the first sheet of coils is coupled to a structure, wherein a requisite expanse of the first sheet of coils is flexibly pulled out from the cradle by pulling the first end.
摘要翻译： 提出了一种成像系统。 成像系统包括支架，以及布置在托架内部的第一片线圈，使得第一片线圈的第一端突出到支架之外，并且第一片线圈的第二端联接到结构， 其中通过拉动所述第一端部将所述第一片线圈的必要的宽度从所述支架中灵活地拉出。
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公开(公告)号：US08559688B2
公开(公告)日：2013-10-15
申请号：US12826801
申请日：2010-06-30
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/436
摘要： A signal processing method is presented. The method includes acquiring undersampled data corresponding to an object, initializing a first image solution and a second image solution, determining a linear combination solution based upon the first image solution and the second image solution, generating a plurality of selected coefficients by iteratively updating the first image solution, the second image solution and the linear combination solution and adaptively thresholding one or more transform coefficients utilizing the undersampled data, an updated first image solution, an updated second image solution and an updated linear combination solution, and reconstructing a data signal using the plurality of selected coefficients.
摘要翻译： 提出了一种信号处理方法。 该方法包括获取与对象相对应的欠采样数据，初始化第一图像解和第二图像解，基于第一图像解和第二图像解确定线性组合解;通过迭代地更新第一图像解 图像解决方案，第二图像解决方案和线性组合解决方案，并且利用欠采样数据自适应地对一个或多个变换系数进行阈值化，更新的第一图像解决方案，更新的第二图像解决方案和更新的线性组合解决方案，以及使用 多个选定系数。
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公开(公告)号：US08165377B2
公开(公告)日：2012-04-24
申请号：US12323594
申请日：2008-11-26
申请人： Vivek Vaidya , Rakesh Mullick , Shekhar Dwivedi , Thomas K. F. Foo , Christopher Judson Hardy , Daniel James Blezek , Umesha Perdoor Srinivas Adiga
发明人： Vivek Vaidya , Rakesh Mullick , Shekhar Dwivedi , Thomas K. F. Foo , Christopher Judson Hardy , Daniel James Blezek , Umesha Perdoor Srinivas Adiga
CPC分类号： A61B5/055 , A61B5/0037 , A61B6/032 , A61B6/503 , A61B8/14 , G06T7/75 , G06T2207/10088 , G06T2207/30048
摘要： An apparatus, system and method to determine a coordinate system of a heart includes an imager and a computer. The computer is programmed to acquire a first set of initialization imaging data from an anatomical region of a free-breathing subject. A portion of the first set of initialization imaging data includes organ data, which includes cardiac data. The computer is further programmed to determine a location of a central region of a left ventricle of a heart, where the location is based on the organ data and a priori information. The computer is also programmed to determine a short axis of the left ventricle based on the determined location, acquire a first set of post-initialization imaging data from the free-breathing subject from an imaging plane orientation based on the determination of the short axis, and reconstruct at least one image from the first set of post-initialization imaging data.
摘要翻译： 用于确定心脏坐标系的装置，系统和方法包括成像器和计算机。 计算机被编程为从自由呼吸对象的解剖区域获取第一组初始化成像数据。 第一组初始化成像数据的一部分包括包括心脏数据的器官数据。 计算机还被编程为确定心脏左心室的中心区域的位置，其中位置基于器官数据和先验信息。 计算机还被编程为基于确定的位置来确定左心室的短轴，基于短轴的确定，从成像平面取向获取来自自由呼吸对象的第一组初始初始化后成像数据， 并且从所述第一组初始化后成像数据重建至少一个图像。
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公开(公告)号：US20120002854A1
公开(公告)日：2012-01-05
申请号：US12826801
申请日：2010-06-30
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/436
摘要： A signal processing method is presented. The method includes acquiring undersampled data corresponding to an object, initializing a first image solution and a second image solution, determining a linear combination solution based upon the first image solution and the second image solution, generating a plurality of selected coefficients by iteratively updating the first image solution, the second image solution and the linear combination solution and adaptively thresholding one or more transform coefficients utilizing the undersampled data, an updated first image solution, an updated second image solution and an updated linear combination solution, and reconstructing a data signal using the plurality of selected coefficients.
摘要翻译： 提出了一种信号处理方法。 该方法包括获取与对象相对应的欠采样数据，初始化第一图像解和第二图像解，基于第一图像解和第二图像解确定线性组合解;通过迭代地更新第一图像解 图像解决方案，第二图像解决方案和线性组合解决方案，并且利用欠采样数据，更新的第一图像解决方案，更新的第二图像解决方案和更新的线性组合解决方案自适应地阈值化一个或多个变换系数，并且使用 多个选定系数。
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公开(公告)号：US20110101979A1
公开(公告)日：2011-05-05
申请号：US12638491
申请日：2009-12-15
IPC分类号： G01R33/48
CPC分类号： G01R33/3621 , G01R33/5602 , G01R33/5614 , G01R33/56366
摘要： An imaging system including an imaging apparatus having a plurality of coils, wherein an imaging target is at least partially disposed proximate the coils with at least one excitation source providing pulse sequences. A switch switchably connects the pulse sequences from the excitation source to the coils and switchably connecting to spatially encoded images from the coils during data acquisition. There is an amplified radiation damping feedback section providing amplified radiation damping feedback to the imaging target, wherein the amplified radiation damping feedback provides recovery of longitudinal magnetization subsequent to the data acquisition, and a receiver section for processing the spatially encoded images.
摘要翻译： 一种成像系统，包括具有多个线圈的成像设备，其中成像目标至少部分地布置在具有至少一个提供脉冲序列的激励源的线圈附近。 开关可切换地连接来自激励源的脉冲序列到线圈，并且在数据采集期间可切换地连接到来自线圈的空间编码图像。 存在放大的辐射阻尼反馈部分，其向成像目标提供放大的辐射阻尼反馈，其中放大的辐射阻尼反馈提供在数据采集之后的纵向磁化的恢复，以及用于处理空间编码的图像的接收器部分。
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公开(公告)号：US20110038560A1
公开(公告)日：2011-02-17
申请号：US12541550
申请日：2009-08-14
IPC分类号： G06K9/36
CPC分类号： G06K9/6232 , G06K9/0057
摘要： A signal processing method is provided. The signal processing method includes the steps of generating undersampled data corresponding to an object, determining a variable thresholding parameter based on a composition of the undersampled data, and iteratively determining thresholded coefficients to generate a plurality of coefficients by utilizing the undersampled data, a current solution and the variable thresholding parameter by updating the variable thresholding parameter and the current solution, and reconstructing a data signal using the plurality of coefficients.
摘要翻译： 提供信号处理方法。 信号处理方法包括以下步骤：产生与对象相对应的欠采样数据，基于欠采样数据的组合确定可变阈值参数，以及迭代确定阈值系数以通过利用欠采样数据产生多个系数，当前解 以及可变阈值参数，通过更新可变阈值参数和当前解，并且使用多个系数重构数据信号。
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公开(公告)号：US20090267602A1
公开(公告)日：2009-10-29
申请号：US12110446
申请日：2008-04-28
IPC分类号： G01R33/483
CPC分类号： G01R33/3415 , G01R33/4833 , G01R33/4836 , G01R33/5611
摘要： A system and method for accelerated MR imaging includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly comprising at least one RF transmit coil and comprising multiple coils to acquire MR images. The MRI apparatus also has a computer programmed to excite multiple pencil regions by use of an under-sampled echo-planar excitation trajectory and acquire MR signals simultaneously on multiple channels of the RF coil assembly. The computer is also programmed to separate contributions from the various multiple pencil regions by use of parallel imaging reconstruction.
摘要翻译： 用于加速MR成像的系统和方法包括具有围绕磁体的孔定位的多个梯度线圈的磁共振成像（MRI）系统，以及RF收发器系统和由脉冲模块控制的RF开关以将RF信号传输到 RF线圈组件，其包括至少一个RF发射线圈并且包括多个线圈以获取MR图像。 MRI装置还具有被编程为通过使用欠采样的回波平面激发轨迹激发多个铅笔区域并且在RF线圈组件的多个通道上同时获取MR信号的计算机。 计算机还被编程为通过使用并行成像重建来分离来自各种多个铅笔区域的贡献。
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59.发明授权公开(公告)号：US07307419B2
公开(公告)日：2007-12-11
申请号：US11017489
申请日：2004-12-20
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/3415 , G01R33/446
摘要： A magnetic resonance imaging (MRI) system and method is provided. The MRI system comprises a plurality of transmit coils arranged spatially distinct from each other and configured for inducing a nuclear magnetic resonance (NMR) excitation. The NMR excitation is selective both in spatial dimensions and in a chemical shift spectrum. The plurality of transmit coils are driven by a plurality of radio frequency (RF) pulses, and a gradient module is driven by a plurality of gradient pulses.
摘要翻译： 提供磁共振成像（MRI）系统和方法。 MRI系统包括在空间上彼此不同布置的多个发射线圈，并被配置用于诱导核磁共振（NMR）激发。 NMR激发在空间尺寸和化学位移谱中都是选择性的。 多个发射线圈由多个射频（RF）脉冲驱动，梯度模块由多个梯度脉冲驱动。
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60.发明授权公开(公告)号：US07167000B2
公开(公告)日：2007-01-23
申请号：US11023140
申请日：2004-12-22
申请人： Kathleen Melanie Amm , Ronald Dean Watkins , William Daniel Barber , Christopher Judson Hardy , Kenneth William Rohling
发明人： Kathleen Melanie Amm , Ronald Dean Watkins , William Daniel Barber , Christopher Judson Hardy , Kenneth William Rohling
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34007 , G01R33/34023 , G01R33/341
摘要： A cryogenically cooled radiofrequency (RF) coil structure for use in Magnetic Resonance Imaging (MRI) and method for cryogenically cooling RF coils are provided. The cryogenically cooled RF coil structure comprises a sealed structure constructed of non-conducting material and adapted for containing a cooling substance and at least one RF coil disposed integrally in contact with the sealed structure such that sealed structure and integrally disposed RF coil are disposed about an object to be imaged.
摘要翻译： 提供了用于磁共振成像（MRI）的低温冷却射频（RF）线圈结构和用于低温冷却RF线圈的方法。 低温冷却的RF线圈结构包括由非导电材料构成并适于容纳冷却物质的密封结构和与密封结构一体地设置的至少一个RF线圈，使得密封结构和整体设置的RF线圈围绕 要成像的对象。
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