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公开(公告)号：US20100073000A1
公开(公告)日：2010-03-25
申请号：US12235228
申请日：2008-09-22
IPC分类号： G01R33/341
CPC分类号： G01R33/422 , G01R33/34061 , G01R33/3628 , G01R33/5659
摘要： Radio frequency (RF) coil configurations and methods are disclosed. Non-magnetic elements may be used in combination with an RF coil. The non-magnetic elements may be metal. The non-magnetic metal elements may be designed and configured to facilitate tuning of an RF coil, and to modify a magnetic field produced by an RF coil. The non-magnetic metal elements may also be used in connection with a RF receiver coil to control the region from which the receiver coil detects signals. The configurations and methods described may be used in various RF applications, including magnetic resonance imaging (MRI).
摘要翻译： 公开了射频（RF）线圈的配置和方法。 非磁性元件可以与RF线圈组合使用。 非磁性元件可以是金属。 非磁性金属元件可以被设计和配置为便于RF线圈的调谐，并且改变由RF线圈产生的磁场。 非磁性金属元件也可以与RF接收器线圈结合使用，以控制接收线圈从该区域检测信号。 所描述的配置和方法可以用于各种RF应用中，包括磁共振成像（MRI）。
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公开(公告)号：US07343194B2
公开(公告)日：2008-03-11
申请号：US10409625
申请日：2003-04-08
IPC分类号： A61B5/05
CPC分类号： A61B5/0555
摘要： In one aspect, a restraining assembly for an awake animal within a magnetic resonance imaging (MRI) device is provided and includes a body restrainer having a first part and a second part that hold a body of the awake animal therebetween. The assembly is of a dual coil design in that it has a volume coil for generating an excitation RF signal and an RF surface coil for receiving an RF response from the animal. The assembly further includes components that serve to restrain movements of the animal, thereby eliminating motion artifacts during the MRI procedure. For example, the assembly preferably includes an adjustable hip holder that has a first section that seats against and applies a restraining force to a buttocks/hip area of the animal and a second section that is adjustably coupled to a pivoting member that is attached to the first section of the body restrainer such that the hip holder is adjustable in both a longitudinal direction along a length of the body restrainer and an up/down direction within the body restrainer between the first and second parts thereof. The pivoting member having features that permit the hip holder to be locked in a desired location so that a sufficient restraining force is applied the animal.
摘要翻译： 一方面，提供了一种用于在磁共振成像（MRI）装置内的清醒动物的约束组件，并且包括具有第一部分和第二部分的身体限制器，该第一部分和第二部分将醒来动物的身体保持在其间。 组件是双线圈设计，其具有用于产生激励RF信号的体积线圈和用于从动物接收RF响应的RF表面线圈。 组件还包括用于抑制动物运动的组件，从而消除MRI过程期间的运动伪影。 例如，组件优选地包括可调节的髋部保持器，其具有抵靠并施加约束力到动物的臀部/臀部区域的第一部分，以及可调节地联接到枢转构件的第二部分， 身体限制器的第一部分，使得臀部保持器沿着身体限制器的长度在纵向方向上可调节，并且在身体限制器之间的上/下方向之间可调节其第一和第二部分之间。 枢转构件具有允许臀部保持器锁定在期望位置的特征，使得动物施加足够的约束力。
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公开(公告)号：US07202668B2
公开(公告)日：2007-04-10
申请号：US11357715
申请日：2006-02-17
申请人： Reinhold Ludwig , Mathew Brevard , Gene Bogdanov
发明人： Reinhold Ludwig , Mathew Brevard , Gene Bogdanov
CPC分类号： G01R33/34046 , G01R33/34007
摘要： A microstrip-based RF coil for use in an MRI apparatus constructed to perform human head imaging is provided and includes (a) a cylindrical non-magnetic core module having an outer surface and a longitudinal axis, a cylindrical bore extending through the core module along the longitudinal axis and defining an inner surface; and a plurality of conductive strip lines. The strip lines extend parallel to the longitudinal axis on the outer surface of the core module. The coil is constructed such that one or more of the conductive strips are divided into conductive microstrip segments with one or more tuning capacitors being bridged between two adjacent microstrip segmented sections of the conductive strip. The coil also include a shield support cylinder that is disposed concentrically about the core module and is spaced therefrom to receive the tuning capacitors. The shield support cylinder supports a conductive segmented shield that is operatively connected to the conductive strips through tunable capacitors at a front and rear of the shield support cylinder.
摘要翻译： 提供了一种用于执行人头成像的MRI设备中使用的基于微带的RF线圈，其包括（a）具有外表面和纵向轴线的圆柱形非磁性核心模块，沿核心模块延伸穿过的圆柱形孔 纵轴并限定内表面; 和多条导电带状线。 带状线在芯模块的外表面上平行于纵向轴线延伸。 线圈被构造成使得一个或多个导电条被分成导电微带段，其中一个或多个调谐电容器被桥接在导电带的两个相邻微带分段部分之间。 线圈还包括屏蔽支撑圆筒，其围绕芯模块同心地设置并与之隔开以接收调谐电容器。 屏蔽支撑圆筒支撑导电分段屏蔽，该屏蔽通过在屏蔽支撑筒的前部和后部的可调电容器可操作地连接到导电条。
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公开(公告)号：US20060250125A1
公开(公告)日：2006-11-09
申请号：US11403205
申请日：2006-04-11
申请人： Gene Bogdanov , Reinhold Ludwig , Craig Ferris
发明人： Gene Bogdanov , Reinhold Ludwig , Craig Ferris
IPC分类号： G01R33/10
CPC分类号： G01R33/34046 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3678
摘要： A dual-tuned volume coil for performing MR imaging according to one embodiment includes an inner cylinder having a first coil structure disposed on an inner surface thereof and a second coil structure disposed on an outer surface thereof. The first coil structure operates at a first resonance frequency and the second coil structure operates at a second resonance frequency. The volume coil includes an outer shield disposed about the inner cylinder, with the first and second coil structure being connected to the outer shield by means of a plurality of capacitors.
摘要翻译： 根据一个实施例的用于执行MR成像的双调谐体积线圈包括：内筒，其具有设置在其内表面上的第一线圈结构和设置在其外表面上的第二线圈结构。 第一线圈结构以第一谐振频率工作，第二线圈结构以第二谐振频率工作。 体积线圈包括围绕内筒设置的外屏蔽，其中第一和第二线圈结构通过多个电容器连接到外屏蔽。
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5.发明授权Methods and systems for non-destructively testing a polycrystalline diamond element 有权用于非破坏性测试多晶金刚石元件的方法和系统公开(公告)号：US09037430B1
公开(公告)日：2015-05-19
申请号：US12830878
申请日：2010-07-06
CPC分类号： G06F19/00 , G01N27/041
摘要： Embodiments of the invention relate to electrical impedance tomography testing systems and methods for non-destructively testing a polycrystalline diamond element (e.g., a polycrystalline diamond table of a polycrystalline diamond compact or a freestanding polycrystalline diamond table) using electrical impedance tomography to locate one or more high-electrical-conductivity regions (e.g., one or more regions of poorly sintered diamond crystals and/or high-metal-solvent catalyst content) and/or one or more low-electrical-conductivity regions (e.g., porosity and/or cracks) in the tested polycrystalline diamond element. Further embodiments relate to a rotary drill bit including at least one polycrystalline diamond compact that has been selectively positioned so that one or more high-electrical-conductivity regions of a polycrystalline diamond table thereof identified using the non-destructive testing systems and methods disclosed herein are not positioned to engage a subterranean formation during drilling.
摘要翻译： 本发明的实施例涉及使用电阻抗层析成像技术来定位一个或多个多晶金刚石元件（例如，多晶金刚石致密体或独立多晶金刚石台的多晶金刚石台）进行非破坏性测试的电阻抗层析成像测试系统和方法 高导电性区域（例如，不良烧结金刚石晶体的一个或多个区域和/或高金属溶剂催化剂含量）和/或一个或多个低电导率区域（例如孔隙率和/或裂纹） 在测试的多晶金刚石元素中。 另外的实施例涉及一种旋转钻头，其包括至少一个已经选择性地定位的多晶金刚石块，使得使用本文公开的非破坏性测试系统和方法识别的多晶金刚石表的一个或多个高电导率区域是 在钻井期间未定位成接合地层。
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公开(公告)号：US07084630B2
公开(公告)日：2006-08-01
申请号：US10789756
申请日：2004-02-27
申请人： Reinhold Ludwig , Gene Bogdanov , Aghogho Obi
发明人： Reinhold Ludwig , Gene Bogdanov , Aghogho Obi
IPC分类号： G01V3/00
CPC分类号： G01R33/3678
摘要： Multi-modal coils for coupling MRI RF signals from an anatomical region(s) to be imaged. The coil includes a segmented annular base ring conductor including a plurality of capacitances disposed between the segments, and at least one arcuate conductor symmetrically connected at each end to the base ring, one end terminating in direct contact with the base ring, the other end electrically connected to the base ring via two of the capacitive electrical connections. The RF coil is operable in multiple receiving modes in phase quadrature to establish a rotating magnetic field phasor orthogonal to the temporally constant uniform magnetic field of the magnetic resonance instrument. The RF coil can be combined with a second RF coil to simultaneously image two anatomical regions.
摘要翻译： 用于耦合待成像的解剖区域的MRI RF信号的多模式线圈。 线圈包括分段的环形基环导体，其包括设置在所述段之间的多个电容，以及至少一个弓形导体，每个端部对称地连接到所述基环，一端终止于与所述基环直接接触，所述另一端电连接 通过两个电容电连接连接到基座环。 RF线圈以相位正交的多个接收模式操作，以建立与磁共振仪器的时间上恒定的均匀磁场正交的旋转磁场相量。 RF线圈可以与第二RF线圈组合以同时成像两个解剖区域。
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公开(公告)号：US20060158191A1
公开(公告)日：2006-07-20
申请号：US11357715
申请日：2006-02-17
申请人： Reinhold Ludwig , Mathew Brevard , Gene Bogdanov
发明人： Reinhold Ludwig , Mathew Brevard , Gene Bogdanov
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/34007
摘要： A microstrip-based RF coil for use in an MRI apparatus constructed to perform human head imaging is provided and includes (a) a cylindrical non-magnetic core module having an outer surface and a longitudinal axis, a cylindrical bore extending through the core module along the longitudinal axis and defining an inner surface; and a plurality of conductive strip lines. The strip lines extend parallel to the longitudinal axis on the outer surface of the core module. The coil is constructed such that one or more of the conductive strips are divided into conductive microstrip segments with one or more tuning capacitors being bridged between two adjacent microstrip segmented sections of the conductive strip. The coil also include a shield support cylinder that is disposed concentrically about the core module and is spaced therefrom to receive the tuning capacitors. The shield support cylinder supports a conductive segmented shield that is operatively connected to the conductive strips through tunable capacitors at a front and rear of the shield support cylinder.
摘要翻译： 提供了一种用于执行人头成像的MRI设备中使用的基于微带的RF线圈，其包括（a）具有外表面和纵向轴线的圆柱形非磁性核心模块，沿核心模块延伸穿过的圆柱形孔 纵轴并限定内表面; 和多条导电带状线。 带状线在芯模块的外表面上平行于纵向轴线延伸。 线圈被构造成使得一个或多个导电条被分成导电微带段，其中一个或多个调谐电容器被桥接在导电带的两个相邻微带分段部分之间。 线圈还包括屏蔽支撑圆筒，其围绕芯模块同心地设置并与之隔开以接收调谐电容器。 屏蔽支撑圆筒支撑导电分段屏蔽，该屏蔽通过在屏蔽支撑筒的前部和后部的可调电容器可操作地连接到导电条。
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公开(公告)号：US07427861B2
公开(公告)日：2008-09-23
申请号：US11403205
申请日：2006-04-11
申请人： Gene Bogdanov , Reinhold Ludwig , Craig Ferris
发明人： Gene Bogdanov , Reinhold Ludwig , Craig Ferris
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3678
摘要： A dual-tuned volume coil for performing MR imaging according to one embodiment includes an inner cylinder having a first coil structure disposed on an inner surface thereof and a second coil structure disposed on an outer surface thereof. The first coil structure operates at a first resonance frequency and the second coil structure operates at a second resonance frequency. The volume coil includes an outer shield disposed about the inner cylinder, with the first and second coil structure being connected to the outer shield by means of a plurality of capacitors.
摘要翻译： 根据一个实施例的用于执行MR成像的双调谐体积线圈包括：内筒，其具有设置在其内表面上的第一线圈结构和设置在其外表面上的第二线圈结构。 第一线圈结构以第一谐振频率工作，第二线圈结构以第二谐振频率工作。 体积线圈包括围绕内筒设置的外屏蔽，其中第一和第二线圈结构通过多个电容器连接到外屏蔽。
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公开(公告)号：US20050162168A1
公开(公告)日：2005-07-28
申请号：US10789756
申请日：2004-02-27
申请人： Reinhold Ludwig , Gene Bogdanov , Aghogho Obi
发明人： Reinhold Ludwig , Gene Bogdanov , Aghogho Obi
IPC分类号： G01R33/341 , G01V3/00
CPC分类号： G01R33/3678
摘要： Multi-modal coils for coupling MRI RF signals from an anatomical region(s) to be imaged. The coil includes a segmented annular base ring conductor including a plurality of capacitances disposed between the segments, and at least one arcuate conductor symmetrically connected at each end to the base ring, one end terminating in direct contact with the base ring, the other end electrically connected to the base ring via two of the capacitive electrical connections. The RF coil is operable in multiple receiving modes in phase quadrature to establish a rotating magnetic field phasor orthogonal to the temporally constant uniform magnetic field of the magnetic resonance instrument. The RF coil can be combined with a second RF coil to simultaneously image two anatomical regions.
摘要翻译： 用于耦合待成像的解剖区域的MRI RF信号的多模式线圈。 线圈包括分段的环形基环导体，其包括设置在所述段之间的多个电容，以及至少一个弓形导体，每个端部对称地连接到所述基环，一端终止于与所述基环直接接触，所述另一端电连接 通过两个电容电连接连接到基座环。 RF线圈以相位正交的多个接收模式操作，以建立与磁共振仪器的时间上恒定的均匀磁场正交的旋转磁场相量。 RF线圈可以与第二RF线圈组合以同时成像两个解剖区域。
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公开(公告)号：US06873156B2
公开(公告)日：2005-03-29
申请号：US10365952
申请日：2003-02-13
CPC分类号： G01R33/341 , A61B5/0555 , A61B5/4094 , G01R33/34007 , G01R33/34046 , G01R33/3453
摘要： The present invention relates to systems and methods of performing magnetic resonance imaging (MRI) in awake animals. The invention utilizes head and body restrainers to position an awake animal relative to a radio frequency dual coil system operating in a high field magnetic resonance imaging system to provide images of high resolution without motion artifact.
摘要翻译： 本发明涉及在清醒动物中进行磁共振成像（MRI）的系统和方法。 本发明利用头部和身体限制器相对于在高场磁共振成像系统中操作的射频双线圈系统来定位清醒动物，以提供高分辨率的图像而不产生运动伪像。
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