公开(公告)号：US20060160242A1

公开(公告)日：2006-07-20

申请号：US10564697

申请日：2004-07-08

申请人： Jens Jensen ,  Joseph Helpern ,  Glyn Johnson ,  Ramesh Chandra

发明人： Jens Jensen ,  Joseph Helpern ,  Glyn Johnson ,  Ramesh Chandra

IPC分类号： G01N24/00

CPC分类号： G01R33/50 ,  G01R33/56341 ,  G01R33/56536 ,  Y10T436/24

摘要： Methods, systems, software arrangements and storage medium for measuring the magnetic field correlation function (“MFC”), and more particularly, to methods for measuring the magnetic field correlation function utilizing asymmetric spin echoes. Asymmetric Dual Spin Echo Sequences (“ADSE”) and Echo Planar Imaging Asymmetric Dual Spin Echo Sequences (“EPI-ADSE”) may be employed to apply multiple echoes to a sample and acquire data from which the MFC may be determined.

摘要翻译： 用于测量磁场相关函数（“MFC”）的方法，系统，软件布置和存储介质，更具体地说，涉及利用非对称自旋回波测量磁场相关函数的方法。 可以采用非对称双自旋回波序列（“ADSE”）和回波平面成像不对称双自旋回波序列（“EPI-ADSE”）将多个回波应用于样本，并获取可以确定MFC的数据。

公开(公告)号：US20120002851A1

公开(公告)日：2012-01-05

申请号：US13022488

申请日：2011-02-07

申请人： Jens Jensen ,  Joseph Helpern ,  Ali Tabesh ,  Els Fieremans

发明人： Jens Jensen ,  Joseph Helpern ,  Ali Tabesh ,  Els Fieremans

IPC分类号： G06K9/00

CPC分类号： G01R33/56341

摘要： Exemplary method, system, and computer-accessible medium can be provided for determining a measure of diffusional kurtosis by receiving data relating to at least one diffusion weighted image, and determining a measure of a diffusional kurtosis as a function of the received data using a closed form solution procedure. In accordance with certain exemplary embodiments of the present disclosure, provided herein are computer-accessible medium, systems and methods for, e.g., imaging in an MRI system, and, more particularly for facilitating estimation of tensors and tensor-derived measures in diffusional kurtosis imaging (DKI). For example, DKI can facilitate a characterization of non-Gaussian diffusion of water molecules in biological tissues. The diffusion and kurtosis tensors parameterizing the DKI model can typically be estimated via unconstrained least squares (LS) methods. In the presence of noise, motion, and imaging artifacts, these methods can be prone to producing physically and/or biologically implausible tensor estimates. The exemplary embodiments of the present disclosure can address at least this deficiency by formulating an exemplary estimation problem, e.g., as linearly constrained linear LS, where the constraints can ensure acceptable tensor estimates.

摘要翻译： 可以提供示例性方法，系统和计算机可访问介质，用于通过接收与至少一个扩散加权图像相关的数据来确定扩散峰度的度量，并且使用闭合的方法确定作为接收数据的函数的扩散峰度的度量 形式解决程序。 根据本公开的某些示例性实施例，本文提供了用于例如在MRI系统中成像的计算机可访问介质，系统和方法，并且更具体地，用于促进扩散峭度成像中的张量和张量导出测量的估计 （DKI）。 例如，DKI可以促进水分子在生物组织中的非高斯扩散的表征。 参数化DKI模型的扩散和峰度张量通常可以通过非约束最小二乘法（LS）方法估计。 在存在噪声，运动和成像伪像的情况下，这些方法可能容易产生物理和/或生物学不可信的张量估计。 本公开的示例性实施例可以通过制定示例性估计问题（例如线性约束线性LS）来解决至少该缺陷，其中约束可以确保可接受的张量估计。

公开(公告)号：US20050099588A1

公开(公告)日：2005-05-12

申请号：US10851722

申请日：2004-05-21

申请人： Joseph Helpern ,  Jens Jensen ,  Truman Brown

发明人： Joseph Helpern ,  Jens Jensen ,  Truman Brown

IPC分类号： G02C7/10 ,  G02C7/12

CPC分类号： G02C7/101 ,  G02C7/12

摘要： An arrangement adapted for viewing at least one liquid crystal display includes at least one lens provided in a particular orientation so as to at least partially reduce attenuation of a polarized light emitted by the at least one liquid crystal display. Another arrangement adapted for viewing at least one liquid crystal display includes at least one lens, having an upper portion and a lower portion, the upper portion being provided in a first orientation being arranged so as to at least partially reduce a glare from ambient light, the lower portion being provided in a second orientation being arranged so as to at least partially reduce attenuation of a polarized light emitted by the at least one liquid crystal display.

摘要翻译： 适于观察至少一个液晶显示器的装置包括以特定方向设置的至少一个透镜，以便至少部分地减少由至少一个液晶显示器发射的偏振光的衰减。 适于观察至少一个液晶显示器的另一种装置包括至少一个具有上部和下部的透镜，所述上部设置在第一方向上，以便至少部分地减少来自环境光的眩光， 所述下部设置在第二取向上，以便至少部分地减少由所述至少一个液晶显示器发射的偏振光的衰减。

公开(公告)号：US08811706B2

公开(公告)日：2014-08-19

申请号：US13022488

申请日：2011-02-07

申请人： Jens Jensen ,  Joseph Helpern ,  Ali Tabesh ,  Els Fieremans

发明人： Jens Jensen ,  Joseph Helpern ,  Ali Tabesh ,  Els Fieremans

IPC分类号： G06T7/00 ,  A61B5/055

CPC分类号： G01R33/56341

摘要： Exemplary method, system, and computer-accessible medium can be provided for determining a measure of diffusional kurtosis by receiving data relating to at least one diffusion weighted image, and determining a measure of a diffusional kurtosis as a function of the received data using a closed form solution procedure. In accordance with certain exemplary embodiments of the present disclosure, provided herein are computer-accessible medium, systems and methods for, e.g., imaging in an MRI system, and, more particularly for facilitating estimation of tensors and tensor-derived measures in diffusional kurtosis imaging (DKI). For example, DKI can facilitate a characterization of non-Gaussian diffusion of water molecules in biological tissues. The diffusion and kurtosis tensors parameterizing the DKI model can typically be estimated via unconstrained least squares (LS) methods. In the presence of noise, motion, and imaging artifacts, these methods can be prone to producing physically and/or biologically implausible tensor estimates. The exemplary embodiments of the present disclosure can address at least this deficiency by formulating an exemplary estimation problem, e.g., as linearly constrained linear LS, where the constraints can ensure acceptable tensor estimates.

摘要翻译： 可以提供示例性方法，系统和计算机可访问介质，用于通过接收与至少一个扩散加权图像相关的数据来确定扩散峰度的度量，并且使用闭合的方法确定作为接收数据的函数的扩散峰度的度量 形式解决程序。 根据本公开的某些示例性实施例，本文提供了用于例如在MRI系统中成像的计算机可访问介质，系统和方法，并且更具体地，用于促进扩散峭度成像中的张量和张量导出测量的估计 （DKI）。 例如，DKI可以促进水分子在生物组织中的非高斯扩散的表征。 参数化DKI模型的扩散和峰度张量通常可以通过非约束最小二乘法（LS）方法估计。 在存在噪声，运动和成像伪像的情况下，这些方法可能容易产生物理和/或生物学不可信的张量估计。 本公开的示例性实施例可以通过制定示例性估计问题（例如线性约束线性LS）来解决至少该缺陷，其中约束可以确保可接受的张量估计。

公开(公告)号：US20070135704A1

公开(公告)日：2007-06-14

申请号：US11592118

申请日：2006-11-03

申请人： Craig Branch ,  Joseph Helpern

发明人： Craig Branch ,  Joseph Helpern

IPC分类号： A61B5/05

CPC分类号： G01R33/422

摘要： An apparatus and method for providing RF shielding for performing nuclear magnetic resonance (“NMR”) procedures, comprising a radio-opaque holder in combination with radio-opaque magnet components to form an RF shield around a patient undergoing an NMR procedure. In embodiments, a radio-opaque holder having a radio-opaque bottom portion and a radio-opaque canopy is adjoined to an NMR magnet having a radio-opaque cryostat and a radio-opaque service end cap to form an RF shield. A patient is placed on a patient support unit located in the holder bottom portion. The patient support unit, including the patient, is then inserted into the cavity of the NMR magnet and a canopy is placed on top of the bottom portion of the holder. An RF shield is thus created comprising the canopy, the bottom portion, the cryostat of the magnet, and an end cap on the service end of the magnet.

摘要翻译： 一种用于提供用于执行核磁共振（“NMR”）程序的RF屏蔽的装置和方法，包括与不透射线的磁体组件组合的不透射线的保持器，以在经历NMR过程的患者周围形成RF屏蔽。 在实施例中，具有不透射线的底部部分和无线电不透明的顶盖的不透射线的支架与具有不透射线的低温恒温器和不透射线的服务端盖的NMR磁体相邻，以形成RF屏蔽。 患者被放置在位于保持器底部的患者支撑单元上。 然后，将包括患者在内的患者支撑单元插入NMR磁体的空腔中，并且将冠盖放置在保持器的底部的顶部。 由此产生包括顶盖，底部部分，磁体的低温恒温器和在磁体的使用端上的端盖的RF屏蔽。

公开(公告)号：US20050027189A1

公开(公告)日：2005-02-03

申请号：US10826321

申请日：2004-04-19

申请人： Craig Branch ,  Joseph Helpern

发明人： Craig Branch ,  Joseph Helpern

IPC分类号： G01R33/422 ,  G01V3/00

CPC分类号： G01R33/422

摘要： An apparatus and method for providing RF shielding for performing nuclear magnetic resonance (“NMR”) procedures, comprising a radio-opaque holder in combination with radio-opaque magnet components to form an RF shield around a patient undergoing an NMR procedure. In embodiments, a radio-opaque holder having a radio-opaque bottom portion and a radio-opaque canopy is adjoined to an NMR magnet having a radio-opaque cryostat and a radio-opaque service end cap to form an RF shield. A patient is placed on a patient support unit located in the holder bottom portion. The patient support unit, including the patient, is then inserted into the cavity of the NMR magnet and a canopy is placed on top of the bottom portion of the holder. An RF shield is thus created comprising the canopy, the bottom portion, the cryostat of the magnet, and an end cap on the service end of the magnet.

摘要翻译： 一种用于提供用于执行核磁共振（“NMR”）程序的RF屏蔽的装置和方法，包括与不透射线的磁体组件组合的不透射线的保持器，以在经历NMR过程的患者周围形成RF屏蔽。 在实施例中，具有不透射线的底部部分和无线电不透明的顶盖的不透射线的支架与具有不透射线的低温恒温器和不透射线的服务端盖的NMR磁体相邻，以形成RF屏蔽。 患者被放置在位于保持器底部的患者支撑单元上。 然后，将包括患者在内的患者支撑单元插入NMR磁体的空腔中，并且将冠盖放置在保持器的底部的顶部。 由此产生包括顶盖，底部部分，磁体的低温恒温器和在磁体的使用端上的端盖的RF屏蔽。