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1.发明授权Timing and control circuitry for flash analog to digital converters with dynamic encoders 失效具有动态编码器的闪存模数转换器的定时和控制电路
公开(公告)号：US4768016A
公开(公告)日：1988-08-30
申请号：US85922
申请日：1987-08-17
申请人： Sow T. Chu , Kenneth W. Rohling
发明人： Sow T. Chu , Kenneth W. Rohling
CPC分类号： H03M1/0675 , H03M1/361
摘要： An analog to digital converter circuit includes encoder circuitry which employs a dummy bit line to derive timing signals employed in establishing stable, valid output digital signal information. For almost all binary codes of interest, the dummy bit line employed may actually comprise a portion of an otherwise unused bit line. The present invention is also distinguished in that it employs a clocked regenerative bit line sustainer circuit driven by dummy bit line derived timing signals. Additionally, the present invention also preferably employs a folded antiparallel architecture in which the bit lines are disposed in a generally U-shaped surrounding the parallel segments along their outer edges.
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公开(公告)号：US5443068A
公开(公告)日：1995-08-22
申请号：US312247
申请日：1994-09-26
CPC分类号： G01R33/4814 , A61B5/0555 , A61N7/02 , A61B2017/00911 , A61B2090/374 , G01R33/4804
摘要： A positioner for a magnetic resonance (MR) surgery system which positions a focal point of an ultrasound transducer to selectively destroys tissue in a region within a patient. The positioning means moves an ultrasound transducer under the control of an operator. Mechanical threaded shafts and slides act as screw drives causing several connected slides to move the ultrasound transducer in three dimensions. Expanding shafts are connected between a fixed point on a housing and the actuating point of the threaded shafts. Two of the expanding shafts employ universal joints allowing the shafts to rotate as they follow the slides. The third expanding shaft need only expand but the relative angle between its attachment points does not change, thereby eliminating the need for universal joints. An MR imaging system employing a temperature sensitive pulse sequence, creates an image of the tissue and the region being heated to allow the operator to adjust the position of the ultrasonic transducer so as to direct ultrasonic energy to the appropriate location.
摘要翻译： 一种用于定位超声换能器的焦点的磁共振（MR）手术系统的定位器，以选择性地破坏患者体内的区域中的组织。 定位装置在操作者的控制下移动超声换能器。 机械螺纹轴和滑块用作螺旋驱动器，使得几个连接的滑块在三维空间中移动超声换能器。 膨胀轴连接在壳体上的固定点和螺纹轴的致动点之间。 两个扩展轴采用万向接头，允许轴沿着滑块旋转。 第三膨胀轴只需要膨胀，但其连接点之间的相对角度不会改变，从而不需要万向节。 使用温度敏感脉冲序列的MR成像系统产生组织的图像和被加热的区域，以允许操作者调整超声波换能器的位置，以将超声能量引导到适当的位置。
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公开(公告)号：US5378989A
公开(公告)日：1995-01-03
申请号：US146346
申请日：1993-11-02
IPC分类号： G01R33/38 , G01R33/385 , G01R33/421 , G01V3/00
CPC分类号： G01R33/385 , G01R33/3802 , G01R33/3806 , G01R33/4215
摘要： A magnetic field gradient apparatus for use in a magnetic resonance (MR) imaging system employing open magnets allows access to a patient while the patient is being imaged. The magnetic field gradient apparatus employs two gradient coil assemblies and a gradient coil amplifier. Each gradient coil assembly has a gradient coil carrier with at least one gradient coil disposed on it. Each gradient coil carrier is comprised of a cylinder with a flange at one end. The gradient coil assemblies are positioned in the bore of each ring of the open magnet and spaced apart from each other allowing access to the patient. The gradient coil amplifier provides current through the gradient coils to create a magnetic field gradient which has high linearity inside an imaging volume. A coil is disposed on cylinders which surround each gradient coil assembly and fit inside the bore of each ring which acts as an active shield and minimizing eddy currents in conductors outside the gradient coil assemblies.
摘要翻译： 用于使用开放磁体的磁共振（MR）成像系统中的磁场梯度装置允许在患者被成像时进入病人。 磁场梯度装置采用两个梯度线圈组件和一个梯度线圈放大器。 每个梯度线圈组件具有梯度线圈架，其上布置有至少一个梯度线圈。 每个梯度线圈架由一端具有凸缘的气缸组成。 梯度线圈组件定位在开放磁体的每个环的孔中并彼此间隔开，允许进入患者。 梯度线圈放大器通过梯度线圈提供电流，以产生在成像体积内具有高线性度的磁场梯度。 线圈设置在围绕每个梯度线圈组件并且装配在每个环的孔内的气缸上，其用作主动屏蔽并且使梯度线圈组件外部的导体中的涡流最小化。
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公开(公告)号：US5247935A
公开(公告)日：1993-09-28
申请号：US854040
申请日：1992-03-19
IPC分类号： A61B17/22 , A61B19/00 , A61N7/02 , G01R33/48 , G01R33/561
CPC分类号： G01R33/4804 , A61B17/2256 , A61B2090/374 , A61N7/02 , G01R33/56308
摘要： A magnetic resonance surgery system facilitates performance of surgery with a focussed ultrasound transducer that selectively destroys tissue in a region within a subject. The focussed ultrasound transducer dissipates ultrasonic energy at a focal point within the region of tissue to be destroyed. A number of hydraulic positioners position the focal point under the control of a surgeon. A magnetic resonance imaging system employing a temperature sensitive pulse sequence creates an image of the tissue and the region being heated to allow the surgeon to adjust the position of the ultrasonic transducer so as to direct ultrasonic energy to the appropriate location.
摘要翻译： 磁共振手术系统有助于利用选择性地破坏受试者内的区域中的组织的聚焦超声换能器进行手术。 聚焦超声波换能器在被破坏的组织区域内的焦点处消散超声波能量。 一些液压定位器将焦点定位在外科医生的控制之下。 使用温度敏感脉冲序列的磁共振成像系统产生组织的图像和被加热的区域，以允许外科医生调节超声换能器的位置，以便将超声波能量引导到适当的位置。
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公开(公告)号：US20090273347A1
公开(公告)日：2009-11-05
申请号：US12112065
申请日：2008-04-30
IPC分类号： G01R33/32
CPC分类号： G01R33/3415 , G01R33/365
摘要： A phased array for a magnetic resonance (MR) imaging apparatus is disclosed that includes a plurality of receiver coils arranged to form a staggered hexagonal coil array, with the staggered hexagonal coil array being rectangular in shape. Included in the plurality of receiver coils are a plurality of standard coils and a plurality of filler coils differing in shape from the standard coils. The shape of the filler coils is such that no more than negligible mutual inductance between the filler coils and all adjacent overlapping standard coils is present.
摘要翻译： 公开了一种用于磁共振（MR）成像设备的相控阵列，其包括布置成形成交错六边形线圈阵列的多个接收器线圈，其中交错的六边形线圈阵列的形状为矩形。 包括在多个接收器线圈中的是多个标准线圈和多个与标准线圈不同形状的填充线圈。 填充线圈的形状使得填充线圈和所有相邻的重叠标准线圈之间的互感不可忽略。
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公开(公告)号：US20080100294A1
公开(公告)日：2008-05-01
申请号：US11554951
申请日：2006-10-31
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34007 , G01R33/34084
摘要： An RF coil assembly includes a plurality of coil supports rotatably interconnected to each other. Each coil support is configured to rotate with respect to at least one adjoining coil support. A plurality of RF coils is connected to each coil support.
摘要翻译： RF线圈组件包括可互相互连的多个线圈支架。 每个线圈支撑件构造成相对于至少一个相邻的线圈支撑件旋转。 多个RF线圈连接到每个线圈支架。
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7.发明授权
公开(公告)号：US5290266A
公开(公告)日：1994-03-01
申请号：US929350
申请日：1992-08-14
IPC分类号： A61B5/055 , A61B10/00 , A61B10/02 , A61B17/00 , A61B17/34 , A61B18/24 , A61B19/00 , A61M5/32
CPC分类号： A61B17/3417 , A61B10/0233 , A61B18/24 , A61B2017/00004 , A61B2017/00911
摘要： Invasive devices, such as laser fiber guides and biopsy needles, constructed of a material which exhibits little or no magnetic susceptibility, have a flexible polymer coating for retaining pieces of the device in the event of a fracture of the invasive device. The polymer coating also allows removal of the pieces of a fractured invasive device from the body of a subject without requiring surgery. The surgical instruments can be used inside a magnetic field during magnetic resonance (MR) imaging, thereby allowing interactive internal images to be produced and displayed to a surgeon during surgery. Since the invasive devices exhibit low susceptibility, they do not distort a created MR image.
摘要翻译： 诸如激光纤维引导件和活检针由表现出很少或不具有磁化率的材料构成的侵入性装置具有柔性聚合物涂层，用于在侵入性装置断裂的情况下保持装置的片。 聚合物涂层还允许从受试者的身体中去除骨折的侵入性装置的碎片，而不需要手术。 手术器械可以在磁共振（MR）成像期间的磁场内使用，从而允许交互式内部图像在外科手术期间产生并显示给外科医生。 由于侵入性装置表现出低的敏感性，它们不会使所产生的MR图像失真。
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公开(公告)号：US07612564B1
公开(公告)日：2009-11-03
申请号：US12112065
申请日：2008-04-30
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/365
摘要： A phased array for a magnetic resonance (MR) imaging apparatus is disclosed that includes a plurality of receiver coils arranged to form a staggered hexagonal coil array, with the staggered hexagonal coil array being rectangular in shape. Included in the plurality of receiver coils are a plurality of standard coils and a plurality of filler coils differing in shape from the standard coils. The shape of the filler coils is such that no more than negligible mutual inductance between the filler coils and all adjacent overlapping standard coils is present.
摘要翻译： 公开了一种用于磁共振（MR）成像设备的相控阵列，其包括布置成形成交错六边形线圈阵列的多个接收器线圈，其中交错的六边形线圈阵列的形状为矩形。 包括在多个接收器线圈中的是多个标准线圈和多个与标准线圈不同形状的填充线圈。 填充线圈的形状使得填充线圈和所有相邻的重叠标准线圈之间的互感不可忽略。
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公开(公告)号：US07365542B1
公开(公告)日：2008-04-29
申请号：US11554951
申请日：2006-10-31
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34007 , G01R33/34084
摘要： An RF coil assembly includes a plurality of coil supports rotatably interconnected to each other. Each coil support is configured to rotate with respect to at least one adjoining coil support. A plurality of RF coils is connected to each coil support.
摘要翻译： RF线圈组件包括可互相互连的多个线圈支架。 每个线圈支撑件构造成相对于至少一个相邻的线圈支撑件旋转。 多个RF线圈连接到每个线圈支架。
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10.发明授权Magnetic resonance guided ultrasound therapy system with inclined track to move transducers in a small vertical space 失效具有倾斜轨道的磁共振引导超声治疗系统在小的垂直空间中移动传感器
公开(公告)号：US5275165A
公开(公告)日：1994-01-04
申请号：US972331
申请日：1992-11-06
CPC分类号： A61N7/02 , A61B2017/00911 , A61B2090/374
摘要： A magnetic resonance (MR) surgery system facilitates surgery with a focussed ultrasound transducer that selectively destroys tissue in a region within a subject. The focussed energy transducer dissipates energy at a focal point within the region of tissue to be destroyed. A non-magnetic positioning device having a vertical dimension small enough to fit easily within the bore of an MR magnet moves an energy transducer in a limited vertical space. The positioning device employs a plurality of hydraulic positioners and an inclined plane to position the ultrasound focal point under the control of an operator. An MR imaging system employing a temperature sensitive pulse sequence creates an image of the tissue and the region being heated to allow the operator to adjust the position of the ultrasonic transducer so as to direct ultrasonic energy to the appropriate location.
摘要翻译： 磁共振（MR）手术系统利用选择性地破坏受试者内的区域中的组织的聚焦超声换能器促进手术。 聚焦能量传感器在要破坏的组织区域内的焦点处消耗能量。 具有小到足以容易地配合在MR磁体的孔内的垂直尺寸的非磁性定位装置在有限的垂直空间中移动能量换能器。 定位装置采用多个液压定位器和倾斜平面，以在操作者的控制下定位超声焦点。 使用温度敏感脉冲序列的MR成像系统产生组织的图像和被加热的区域，以允许操作者调整超声波换能器的位置，以将超声能量引导到适当的位置。
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