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1. 发明授权

US06768051B2 Screens for RF magnetic flux 有权
标题翻译：屏蔽RF磁通量
公开(公告)号：US06768051B2
公开(公告)日：2004-07-27
申请号：US10220737
申请日：2003-01-28
申请人： Michael Charles Keogh Wiltshire , Ian Robert Young
发明人： Michael Charles Keogh Wiltshire , Ian Robert Young
IPC分类号： H05K900
CPC分类号： H05K9/0075 , H01Q17/00
摘要： Microstructured materials which can be tuned to a particular range of r.f. frequencies to display particular magnetic permeabilities have been proposed. A typical material is made of an array of capacitive elements e.g. spirals or rolls of conducting material on a non-conducting substrate. These materials can be used as screening material which is effective for the particular band of frequencies to which it is tuned. In one example, the rolls 2 to 5 are orientated normal to the face of the screen 1, which reflects or absorbs the magnetic vector of electromagnetic radiation impinging normal onto the reflector face.

2. 发明授权

US07532008B2 Material having magnetic permeability at R.F. frequency 失效
标题翻译：材料在R.F.具有导磁率频率
公开(公告)号：US07532008B2
公开(公告)日：2009-05-12
申请号：US10311962
申请日：2001-06-20
申请人： John Brian Pendry , Ian Robert Young , Michael Charles Keogh Wiltshire , Joseph Vilmos Hajnal , David James Larkman , David John Gilderdale
发明人： John Brian Pendry , Ian Robert Young , Michael Charles Keogh Wiltshire , Joseph Vilmos Hajnal , David James Larkman , David John Gilderdale
IPC分类号： G01V3/00
CPC分类号： H01Q3/44 , H01Q19/062
摘要： A material having magnetic permeability at r.f. frequency, for example a microstructured magnetic material has a magnetic permeability of negative value but unity magnitude over a particular r.f. frequency range. The singularity in the flux pattern has the result that magnetic resonant disturbances in a plane C,E normal to the line C,D are focussed into a plane D,F also normal to the line C,D and vice versa. This is particularly applicable to magnetic resonance apparatus, since the material can be used to transfer the r.f. magnetic flux distribution in a target region in a patient, for example at C,E to D,F where the flux may be directly measured by receive coils. Equally, transmit coils may generate flux to be focussed into the target region by the material. Magnetic resonance apparatus may be constructed which does not require gradient coils, and r.f. hypothermia may be carried out in a focussed way, minimising damage to surrounding tissue.
摘要翻译：在r.f具有导磁率的材料频率，例如微结构磁性材料具有负值的磁导率，而在特定的r.f上具有单位幅度。频率范围。通量图中的奇点具有如下结果：平行于线C，D的平面C，E中的磁共振扰动聚焦在平面D，F，也垂直于线C，D，反之亦然。这特别适用于磁共振设备，因为该材料可以用于传送r.f. 例如在C，E至D，F中的患者目标区域中的磁通量分布，其中通量可以由接收线圈直接测量。同样地，发射线圈可以产生通过材料聚焦到目标区域中的通量。可以构造不需要梯度线圈的磁共振装置，并且r.f. 低温可以以聚焦方式进行，使对周围组织的损伤最小化。

3. 发明授权

US07170363B2 Guides for r.f. magnetic flux 有权
标题翻译： r.f.的指南磁通量
公开(公告)号：US07170363B2
公开(公告)日：2007-01-30
申请号：US10220734
申请日：2001-03-06
申请人： Michael Charles Keogh Wiltshire , Ian Robert Young
发明人： Michael Charles Keogh Wiltshire , Ian Robert Young
IPC分类号： G01V3/00 , H04B3/28 , H01P1/26 , H05K9/00
CPC分类号： G01R33/36 , H01P3/12
摘要： Microstructure materials which can be tuned to a particular range of r.f. frequencies to display particular magnetic permeabilities have been proposed. A typical material is made of an array of capacitive elements e.g. spirals or rolls of conducting material on a non-conducting substrate. These materials can be used as a guide which is effective for the particular band of frequencies to which it is tuned. In one example, the rolls (2a to 2c) guide magnetic flux along ducts (1, 2, 3) while rolls (4a, 5a) guide magnetic flux along ducts (4, 5). Flux can thus be guided upwardly along duct (2), along ducts (4 and 5), and down ducts (1, 3), or vice versa.
摘要翻译：可以调谐到特定范围的微结构材料。已经提出了显示特定的磁导率的频率。典型的材料由电容元件阵列制成。不导电基材上的导电材料的螺旋或卷。这些材料可以用作对其调谐的特定频带的有效的指导。在一个示例中，辊（2a至2c）沿着管道（1,2,3）引导磁通量，同时辊（4a，5a）引导沿着管道（4,5）的磁通量。因此，通道可以沿着管道（2）沿管道（4和5）和下管道（1,3）向上引导，反之亦然。

4. 发明授权

US5719654A Liquid crystal fabry perot filter device having a peak operating wavelength of 10.6 microns 失效
标题翻译：具有10.6微米峰值工作波长的液晶fabry perot过滤器装置
公开(公告)号：US5719654A
公开(公告)日：1998-02-17
申请号：US535228
申请日：1995-11-13
申请人： Michael Charles Keogh Wiltshire , Gregory Stuart Taylor
发明人： Michael Charles Keogh Wiltshire , Gregory Stuart Taylor
IPC分类号： G02F1/13 , G02F1/137 , G02F1/141 , G02F1/21 , G02F1/1333 , G02F1/03 , G02F1/07
CPC分类号： G02F1/216 , G02F1/141
摘要： An electrically-controllable liquid crystal filter device comprises two partially-reflecting substrate structures mounted substantially parallel to each other with a space therebetween to form a Fabry-Perot filter. A layer of ferroelectric liquid crystal material is disposed in the space, the liquid crystal material being switchable, by application of an electric field, between different refractive index values whereby the device is switchable between transmissive and reflective states for light of a particular narrow wavelength band. The spacing of the substrate structures is selected in relation to the wavelength of light to be transmitted, such that the Fabry-Perot filter operates in a low order state, which may be the first order.
摘要翻译： PCT No.PCT / GB94 / 00931 Sec。 371日期：1995年11月13日 102（e）1995年11月13日PCT PCT 1994年4月29日PCT公布。公开号WO94 / 25895 日期1994年11月10日一种电气可控液晶滤波器装置包括两个基本上彼此平行地安装的部分反射的基板结构，其间具有空间以形成法布里 - 珀罗滤波器。一层铁电液晶材料设置在该空间中，液晶材料可通过施加电场而在不同的折射率值之间切换，由此该装置可以在特定窄波长带的光的透射和反射状态之间切换。衬底结构的间距相对于要传输的光的波长被选择，使得法布里 - 珀罗滤波器以低阶状态操作，这可以是第一级。

5. 发明授权

US06927574B2 Magnetic resonance apparatus including an rf magnetic flux guiding structure for improving the signal-to-noise ratio 失效
标题翻译：包括用于提高信噪比的rf磁通引导结构的磁共振装置
公开(公告)号：US06927574B2
公开(公告)日：2005-08-09
申请号：US10220730
申请日：2001-03-06
申请人： Robert Ian Young , Michael Charles Keogh Wiltshire
发明人： Robert Ian Young , Michael Charles Keogh Wiltshire
IPC分类号： G01R33/34 , A61B5/055 , G01R33/32 , G01R33/56 , H01F5/00 , G01V3/00 , H01P1/26 , H04B3/28 , H05K9/00
CPC分类号： G01R33/32 , G01R33/34015 , G01R33/34023 , G01R33/341
摘要： A pad which has a magnetic permeability greater than that of free space at the frequency of nuclear magnetic resonance but which is non-magnetic in steady magnetic fields is disposed between an RF coil and the surface of a patient. The pad is surmounted by a block having similar properties. Two further pads extend from the ends of the block to the surface of the patient. The pads and block guide magnetic flux, which is indicative of magnetic resonant active nuclei in the patient, towards an RF coil which is spaced apart from the surface of the patient/object under examination.
摘要翻译：在RF线圈和患者的表面之间设置磁导率大于核磁共振频率的自由空间的磁导率，而在稳定磁场中为非磁性的垫。该垫被具有相似性质的块所覆盖。两个另外的垫从块的端部延伸到患者的表面。衬垫和块引导磁通，其指示患者中的磁共振活性核，朝向与被检查的患者/物体的表面间隔开的RF线圈。

6. 发明授权

US06801173B2 Structure with switchable magnetic properties 失效
标题翻译：具有可切换磁性的结构
公开(公告)号：US06801173B2
公开(公告)日：2004-10-05
申请号：US10220731
申请日：2002-12-16
申请人： Michael Charles Keogh Wiltshire
发明人： Michael Charles Keogh Wiltshire
IPC分类号： H01G4005
CPC分类号： H01Q15/0013 , H01Q15/00 , H01Q15/002 , H01Q15/148
摘要： A structure (40) with switchable magnetic properties comprises: an array of capacitive elements (44) in which each capacitive element (44) includes a low resistance conducting path and is such that a magnetic component (H) of electromagnetic radiation (12) lying within a predetermined frequency band induces an electrical current (j) to flow around said path and through said associated element (44). The size of the elements (44) and their spacing (&agr;) apart are selected such as to provide a predetermined permeability (&mgr;) in response to said received electromagnetic radiation (12). Each capacitive element (44) comprises a plurality of stacked planar sections (42) each or which comprises at least two concentric spiral conducting members or tracks (46, 48) which are electrically insulated from each other. A switchable permittivity material, such as Barium Strontium Titanate (BST) is provided between the tracks. The magnetic properties of the structure are switched by applying a dc electrical potential between the conducting tracks.
摘要翻译：具有可切换磁性的结构（40）包括：电容元件（44）的阵列，其中每个电容元件（44）包括低电阻导电路径，并且使得电磁辐射（12）的磁性成分（H）位于在预定频带内引起电流（j）围绕所述路径流过所述相关元件（44）。选择元件（44）的尺寸及其间隔（α），以便响应于所述接收的电磁辐射（12）提供预定的磁导率（μ）。每个电容元件（44）包括多个堆叠的平面部分（42），每个或多个平面部分包括彼此电绝缘的至少两个同心螺旋导电构件或轨道（46,48）。在轨道之间提供可切换的介电常数材料，例如钛酸钡钡（BST）。通过在导电轨道之间施加直流电位来切换结构的磁特性。

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