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1. 发明授权

US4068306A X-ray data acquisition system and method for calibration 失效
标题翻译： X射线数据采集系统和校准方法
公开(公告)号：US4068306A
公开(公告)日：1978-01-10
申请号：US704415
申请日：1976-07-12
申请人： Arthur C. M. Chen , William D. Barber , Walter H. Berninger , Gerald J. Carlson , Norman C. Gittinger , James R. Whitten
发明人： Arthur C. M. Chen , William D. Barber , Walter H. Berninger , Gerald J. Carlson , Norman C. Gittinger , James R. Whitten
IPC分类号： A61B6/00 , A61B6/03 , G06T11/00 , H03M1/00 , H03K13/02 , G01N23/00
CPC分类号： A61B6/583 , A61B6/032 , A61B6/585 , H03M1/1023 , Y10S378/901
摘要： A tomographic x-ray imaging system comprises a large plurality of parallel data acquisition channels which integrate and digitize signals from an array of x-ray detectors. Calibration pulses are injected into each data acquisition channel to permit measurement of drift in electronic gain and dc offset parameters. Separate x-ray detectors continuously monitor the intensity of the x-ray source.The measured values for channel gains, dc offsets, and source intensity are fed to a digital computer where they are automatically combined with x-ray transmission data to compensate for system drift and extend the period between calibration measurements.
摘要翻译：断层X射线成像系统包括大量并行数据采集通道，它们集成并数字化来自X射线检测器阵列的信号。校准脉冲被注入到每个数据采集通道中，以允许测量电子增益和直流偏移参数中的漂移。分开的x射线探测器连续监测x射线源的强度。

2. 发明授权

US4070707A Reduction of offsets in data acquisition systems 失效
标题翻译：减少数据采集系统的偏移量
公开(公告)号：US4070707A
公开(公告)日：1978-01-24
申请号：US704413
申请日：1976-07-12
申请人： William D. Barber
发明人： William D. Barber
IPC分类号： A61B6/03 , G06T11/00 , H03M1/00 , H03K13/02 , G01N23/00
CPC分类号： A61B6/032 , A61B6/583 , A61B6/585 , H03M1/1023 , Y10S378/901
摘要： A data acquisition system, for use in computerized x-ray tomography equipment, comprises hundred data transmission channels, each of which includes a ramp comparison type (i.e., a single slope) A/D converter. The comparator elements in the converters may exhibit substantial propagation delays which contribute to offsets in the values of data transmitted through the channels.The effect of comparator propagation delays may be reduced by preconditioning each converter before each digitization: a small signal voltage is injected into each converter. The injected voltage is then removed by a linear integration which is terminated in response to an output signal from the comparator element. A negative residue voltage remains on each converter circuit which, during a subsequent digitization, functions to cancel the offsets produced by propagation delays in that circuit.
摘要翻译：用于计算机化X射线断层摄影设备的数据采集系统包括百个数据传输通道，每个数据传输通道包括斜坡比较型（即单斜率）A / D转换器。转换器中的比较器元件可能表现出实质上的传播延迟，其有助于通过通道传输的数据的值的偏移。

3. 发明授权

US5742164A Misalignment compensation for MR gradient coil assembly 失效
标题翻译： MR梯形线圈组件的未对准补偿
公开(公告)号：US5742164A
公开(公告)日：1998-04-21
申请号：US579755
申请日：1995-12-28
申请人： Peter B. Roemer , William D. Barber
发明人： Peter B. Roemer , William D. Barber
IPC分类号： G01R33/565 , G01V3/00 , G01V3/14
CPC分类号： G01R33/56518
摘要： The invention is directed to a gradient coil assembly for MR imaging which includes a gradient coil set comprising inner and outer gradient coils, the inner gradient coil located within the outer gradient coil and surrounding or otherwise proximate to an imaging volume. The system further includes means for selectively energizing the inner and outer gradient coils to generate a resultant gradient field in the imaging volume. The energized inner and outer gradient coils are also disposed to collectively generate an eddy current field component in a region between the outer coil and a conductive structure spaced-apart therefrom when the inner gradient coil is displaced along an axis from a specified position with respect to the outer gradient coil. A compensation coil is selectively positioned with respect to the inner and outer gradient coils, and means are provided for applying a compensation current to the compensation coil to generate a magnetic field which substantially cancels the eddy current component, the compensation current and the displacement of the inner coil along the axis from the specified position having a specified relationship.
摘要翻译：本发明涉及用于MR成像的梯度线圈组件，其包括梯度线圈组，该梯度线圈组包括内部和外部梯度线圈，内部梯度线圈位于外部梯度线圈内并且围绕成像体积或以其他方式接近成像体积。该系统还包括用于选择性地激励内部和外部梯度线圈以在成像体积中产生合成梯度场的装置。激励的内部和外部梯度线圈也被设置成在外部线圈和与其间隔开的导电结构之间的区域中共同地产生涡流场分量，当内部梯度线圈沿着轴线相对于相对于外梯度线圈。补偿线圈相对于内部和外部梯度线圈选择性地定位，并且提供用于向补偿线圈施加补偿电流以产生基本上抵消涡流分量，补偿电流和补偿电流的位移的磁场的装置内部线圈沿着具有指定关系的指定位置的轴线。

4. 发明授权

US4542657A Time domain technique to determine mean frequency 失效
标题翻译：时域技术来确定平均频率
公开(公告)号：US4542657A
公开(公告)日：1985-09-24
申请号：US526856
申请日：1983-08-26
申请人： William D. Barber , Jeffrey W. Eberhard , Steven G. Karr
发明人： William D. Barber , Jeffrey W. Eberhard , Steven G. Karr
IPC分类号： G01S15/50 , A61B8/06 , G01P5/00 , G01P5/24 , G01R23/02 , G01R23/14 , G01S13/58 , G01S15/58 , H03H17/00 , G01F1/66
CPC分类号： G01R23/02 , A61B8/06 , G01P5/001 , G01P5/244
摘要： Accurate estimates of the instantaneous mean frequency of a time varying signal are achieved at favorable and adverse signal-to-noise ratios by an improved time domain approach. Demodulated in-phase and quadrature signals are sampled and delayed. Noise in both terms of a simple arc tangent algorithm, whose denominator has products of time samples shifted at least one time period with respect to itself, is uncorrelated and removed by low pass filtering. One embodiment is a pulsed ultrasonic Doppler system with quadrature detection to measure and display blood velocity as a function of time.
摘要翻译：通过改进的时域方法，在有利和不利的信噪比下实现对时变信号的瞬时平均频率的准确估计。解调的同相和正交信号被采样和延迟。简单的反正切算法的噪声，其分母具有相对于其自身移动至少一个时间段的时间样本的乘积，是通过低通滤波而不相关和去除的。一个实施例是具有正交检测的脉冲超声多普勒系统，用于测量和显示作为时间的函数的血液速度。

5. 发明授权

US06694602B2 Method of making a pole piece for an MRI 失效
标题翻译：制作磁极片的方法
公开(公告)号：US06694602B2
公开(公告)日：2004-02-24
申请号：US09738856
申请日：2000-12-18
申请人： Evangelos T. Laskaris , William D. Barber , Bulent Aksel , Paul S. Thompson , Michele D. Ogle
发明人： Evangelos T. Laskaris , William D. Barber , Bulent Aksel , Paul S. Thompson , Michele D. Ogle
IPC分类号： H01F706
CPC分类号： H01F7/0278 , G01R33/383 , Y10S29/001 , Y10T29/4902 , Y10T29/49075 , Y10T29/49078
摘要： A method is presented for manufacturing laminate tile metal pole pieces for an MRI. Each laminate tile has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles to be attached side by side to form a multiple concentric annular array pole piece without using oddly shaped edge filler tiles needed to fill a circular pole piece with square tiles. The pole piece is made by placing a plurality of tiles into a mold and filling the mold with an adhesive substance to bind the plurality of tiles into a unitary tile body. The unitary tile body is then removed from the mold and attached to a pole piece base to form the pole piece. The mold cavity surface preferably has a non-uniform contour. The bottom surface of the unitary tile body forms a substantially inverse contour of the mold cavity surface contour.
摘要翻译：提出了一种用于制造用于MRI的层压瓦片金属极片的方法。每个层压砖具有梯形或环形扇形。梯形形状允许瓦片并排连接以形成多个同心环形阵列极片，而不使用填充具有方形瓦片的圆形极片所需的奇怪形状的边缘填充瓦。极片通过将多个瓦片放置在模具中并用粘合剂物质填充模具来制造，以将多个瓦片粘合成整体瓦片体。然后将单一瓦片体从模具中取出并附接到极片基座以形成极片。模腔表面优选具有不均匀的轮廓。整体瓦片体的底面形成模腔表面轮廓的基本上相反的轮廓。

6. 发明授权

US6150819A Laminate tiles for an MRI system and method and apparatus for manufacturing the laminate tiles 有权
标题翻译：用于MRI系统的层叠瓦片以及用于制造层压瓦片的方法和装置
公开(公告)号：US6150819A
公开(公告)日：2000-11-21
申请号：US198510
申请日：1998-11-24
申请人： Evangelos T. Laskaris , William D. Barber , Bulent Aksel , Richard A. Ranze
发明人： Evangelos T. Laskaris , William D. Barber , Bulent Aksel , Richard A. Ranze
IPC分类号： A61B5/055 , G01R33/383 , H01F7/02 , H01F7/20 , H01F41/02 , G01V3/00
CPC分类号： G01R33/383 , H01F41/0226 , H01F7/0278 , H01F7/20 , Y10T29/49078
摘要： A laminate tile pole piece for an MRI, a method and an apparatus for manufacturing laminate tile metal pole pieces for an MRI. Each laminate tile has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles to be attached side by side to form a multiple concentric ring pole piece without using oddly shaped edge filler tiles needed to fill a circular pole piece with square tiles. The laminate tiles are formed by unwinding a metal ribbon, guiding the ribbon through an adhesive bath, winding the ribbon on a polygonal bobbin, such as a rectangular bobbin, to form a coil with at least one flat side, removing the coil from the bobbin, cutting the coil into laminate bars and shaping the laminate bars into trapezoidal or annular sector shaped laminate tiles. The apparatus contains an adhesive bath, a polygonal shaped bobbin, bobbin side plates for guiding the ribbon onto the bobbin and pressure plates for controlling the thickness of the coil. The apparatus also contains a cutting tool for cutting the coil into laminate bars after the coil is removed from the bobbin and a water jet to shape the laminate bars into trapezoidal or annular sector shaped laminate tiles.
摘要翻译：用于MRI的叠层瓦片极片，用于制造用于MRI的层压瓦片金属极片的方法和装置。每个层压砖具有梯形或环形扇形。梯形形状允许瓦片并排连接以形成多个同心圆极片，而不使用填充具有方形瓦片的圆形极片所需的奇怪形状的边缘填充瓦。通过展开金属带来形成层压瓦片，通过粘合剂浴引导带状物，将带卷绕在诸如矩形线轴的多边形线轴上以形成具有至少一个平坦侧面的线圈，将线圈从线轴将线圈切割成层压棒，并将层压棒成型为梯形或环形扇形形状的层压瓦片。该装置包括粘合剂浴，多边形线轴，用于将带引导到线轴上的线轴侧板和用于控制线圈厚度的压板。该设备还包括一个切割工具，用于在将线圈从筒管上取下并将水射流成形为梯形或环形扇形层压瓦片之后将线圈切割成层压棒。

7. 发明授权

US5378989A Open gradient coils for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的开放梯度线圈
公开(公告)号：US5378989A
公开(公告)日：1995-01-03
申请号：US146346
申请日：1993-11-02
申请人： William D. Barber , Peter B. Roemer , Kenneth W. Rohling
发明人： William D. Barber , Peter B. Roemer , Kenneth W. Rohling
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。

8. 发明授权

US5365927A Magnetic resonance imaging system with pointing device 失效
标题翻译：具有指向装置的磁共振成像系统
公开(公告)号：US5365927A
公开(公告)日：1994-11-22
申请号：US146345
申请日：1993-11-02
申请人： Peter B. Roemer , Samuel M. Blumenfeld , Kirby G. Vosburgh , Harvey E. Cline , William D. Barber , William E. Lorensen , Richard L. St. Peters , John F. Schenck , Charles L. Dumoulin , Robert D. Darrow , Christopher J. Hardy
发明人： Peter B. Roemer , Samuel M. Blumenfeld , Kirby G. Vosburgh , Harvey E. Cline , William D. Barber , William E. Lorensen , Richard L. St. Peters , John F. Schenck , Charles L. Dumoulin , Robert D. Darrow , Christopher J. Hardy
IPC分类号： G01R33/48 , A61B5/055 , G01R33/28 , G01R33/38 , G01R33/385 , G01R33/54 , G01R33/563
CPC分类号： G01R33/385 , G01R33/3806 , G01R33/285 , G01R33/4804 , G01R33/543 , G01R33/563
摘要： A magnetic resonance (MR) imaging system for use in a medical procedure employs an open main magnet allowing access to a portion of a patient within an imaging volume, for producing a main magnetic field over the imaging volume; a set of open gradient coils which provide magnetic fields gradients over the imaging volume without restricting access to the imaging volume; a radiofrequency coil set for transmitting RF energy into the imaging volume to nutate nuclear spins within the imaging volume and receive an MR response signal from the nuclear spins; and a pointing device for indicating the position and orientation of a plane in which an image is to be acquired; an image control means for operating power supplies for the gradient coils and the RF coils to acquire an MR signal from the desired imaging plane; and a computation unit for constructing an image of the desired imaging plane. The MR imaging system is intended to operate to provide images to a physician during medical procedures to guide the physician in his procedures.
摘要翻译：用于医疗过程的磁共振（MR）成像系统采用打开的主磁体，其允许进入成像体积内的患者的一部分，用于在成像体积上产生主磁场; 一组开放的梯度线圈，其在成像体积上提供磁场梯度，而不限制对成像体积的访问; 射频线圈组，用于将RF能量传输到成像体积中，以在成像体积内盘旋核自旋，并从核自旋接收MR响应信号; 以及指示装置，用于指示要获取图像的平面的位置和方位; 图像控制装置，用于操作梯度线圈和RF线圈的电源，以从期望的成像平面获取MR信号; 以及用于构造所需成像平面的图像的计算单元。 MR成像系统旨在在医疗程序期间向医生提供图像以在他的程序中指导医师。

9. 发明授权

US3946418A Resistive gate field effect transistor 失效
标题翻译：电阻栅场效应晶体管
公开(公告)号：US3946418A
公开(公告)日：1976-03-23
申请号：US302799
申请日：1972-11-01
申请人： Raymond A. Sigsbee , William D. Barber
发明人： Raymond A. Sigsbee , William D. Barber
IPC分类号： H01L27/02 , H01L29/43 , H01L29/78
CPC分类号： H01L27/0218 , H01L29/435 , H01L29/78 , Y10S148/053 , Y10S148/122 , Y10S148/136
摘要： A resistive gate field effect transistor (FET) is disclosed in which the gate comprises a resistive film overlying an insulating layer and in contact with both the source and drain electrodes. This provides an integrated circuit, bidirectional voltage limiter in which the limiting voltage can be tailored to almost any value likely to be found on an integrated circuit. In another form of the present invention, a conductive gate is added between the resistive gate and the substrate.
摘要翻译：公开了电阻栅场效应晶体管（FET），其中栅极包括覆盖绝缘层并与源极和漏极两者接触的电阻膜。这提供了一种集成电路双向限压器，其中限制电压可以被定制成几乎可能在集成电路上发现的任何值。在本发明的另一种形式中，在电阻栅极和衬底之间添加导电栅极。

10. 发明授权

US06429761B2 Mold for bonding MRI pole piece tiles and method of making the mold 有权
标题翻译：用于粘结MRI极片的模具和制造模具的方法
公开(公告)号：US06429761B2
公开(公告)日：2002-08-06
申请号：US09738838
申请日：2000-12-18
申请人： Evangelos T. Laskaris , William D. Barber , Johannes M van Oort , Bulent Aksel , Paul S. Thompson , Michele D. Ogle
发明人： Evangelos T. Laskaris , William D. Barber , Johannes M van Oort , Bulent Aksel , Paul S. Thompson , Michele D. Ogle
IPC分类号： H01F500
CPC分类号： H01F7/0278 , G01R33/383 , Y10S29/001 , Y10T29/4902 , Y10T29/49075 , Y10T29/49078
摘要： A laminate tile pole piece for an MRI, a method and a mold for manufacturing laminate tile metal pole pieces for an MRI. Each laminate tile has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles to be attached side by side to form a multiple concentric annular array pole piece without using oddly shaped edge filler tiles needed to fill a circular pole piece with square tiles. The pole piece is made by placing a plurality of tiles into a mold and filling the mold with an adhesive substance to bind the plurality of tiles into a unitary tile body. The unitary tile body is then removed from the mold and attached to a pole piece base to form the pole piece. The mold cavity surface preferably has a non-uniform contour. The bottom surface of the unitary tile body forms a substantially inverse contour of the mold cavity surface contour.
摘要翻译：用于MRI的叠层瓦片极片，用于制造用于MRI的层压瓦片金属极片的方法和模具。每个层压砖具有梯形或环形扇形。梯形形状允许瓦片并排连接以形成多个同心环形阵列极片，而不使用填充具有方形瓦片的圆形极片所需的奇怪形状的边缘填充瓦。极片通过将多个瓦片放置在模具中并用粘合剂物质填充模具来制造，以将多个瓦片粘合成整体瓦片体。然后将单一瓦片体从模具中取出并附接到极片基座以形成极片。模腔表面优选具有不均匀的轮廓。整体瓦片体的底面形成模腔表面轮廓的基本上相反的轮廓。

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