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31. 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。

32. 发明授权

US5258710A Cryogenic probe for NMR microscopy 失效
标题翻译：用于NMR显微镜的低温探针
公开(公告)号：US5258710A
公开(公告)日：1993-11-02
申请号：US858924
申请日：1992-03-27
申请人： Robert D. Black , Peter B. Roemer , Antonio A. Mogro-Campero , Larry G. Turner
发明人： Robert D. Black , Peter B. Roemer , Antonio A. Mogro-Campero , Larry G. Turner
IPC分类号： F17C13/00 , G01R33/31 , G01R33/34 , G01R33/20
CPC分类号： G01R33/34053 , G01R33/31 , G01R33/34061 , G01R33/341 , G01R33/34007 , G01R33/34023 , G01R33/3403
摘要： An apparatus for microscopic imaging employing nuclear magnetic resonance is constructed from a cryogenic probe which is situated in a conventional magnetic resonance imaging system. The cryogenic probe employs a number of chambers and cryogenic liquids which cool a superconductor resonator to very low temperatures. A sample tube for containing a small specimen is heated to a temperature above its freezing point by flowing nitrogen gas over the specimen. A secondary resonant circuit is inductively coupled to the superconducting resonator. A transceiver passes RF signals to be transmitted into the specimen through the secondary resonant circuit causing the superconducting resonator to transmit the RF signal into the specimen. The resonator then acts as a receive coil and receives a signal from the specimen which is inductively passed to the secondary resonator circuit from which an image is generated. The use of superconductors having low resistance and low temperatures causes noise to be significantly reduced, and the signal-to-noise ratio to be substantially increased.
摘要翻译：使用核磁共振的微观成像装置由位于常规磁共振成像系统中的低温探针构成。低温探针采用多个室和低温液体，将超导体谐振器冷却到非常低的温度。用于容纳小样本的样品管通过将氮气流过样品而被加热到高于其凝固点的温度。次级谐振电路感应耦合到超导谐振器。收发器将RF信号通过次级谐振电路传输到样品中，使超导谐振器将RF信号传输到样品中。谐振器然后用作接收线圈并且接收来自样品的信号，其被感应地传递到从其产生图像的次级谐振器电路。使用具有低电阻和低温度的超导体使得噪声显着降低，并且信噪比将显着增加。

33. 发明授权

US4926125A Surface gradient assembly for high speed nuclear magnetic resonance imaging 失效
标题翻译：用于高速核磁共振成像的表面梯度组件
公开(公告)号：US4926125A
公开(公告)日：1990-05-15
申请号：US234729
申请日：1988-08-22
申请人： Peter B. Roemer
发明人： Peter B. Roemer
IPC分类号： G01R33/20 , A61B5/055 , G01R33/38 , G01R33/385 , G01R33/422 , G01R33/48
CPC分类号： G01R33/422 , G01R33/385
摘要： A novel surface gradient assembly for high-speed, high-resolution NMR imaging has at least one substantially planar gradient coil. Each of the planar coils is disposed substantially parallel to any other planar coil of the assembly, and in a chosen plane of two selected Cartesian coordinates. Thus, one or more, planar coils lying in, say, the XZ plane can provide a magnetic gradient field in 1, 2 or all 3 of the X, Y and/or Z directions. Each coil can be formed of 1, 2, 4 or more windings, each of which is a "fingerprint" coil of configuration established by current-flow stream functions. An RF shield can be placed between the substantially planar gradient coil(s) and a RF antenna, to prevent interaction between the antenna and gradient coils, so that the quality factor (Q) of the RF antenna is not appreciable lowered.

34. 发明授权

US4887039A Method for providing multiple coaxial cable connections to a radio-frequency antenna without baluns 失效
标题翻译：提供多个同轴电缆连接到没有巴伦的射频天线的方法
公开(公告)号：US4887039A
公开(公告)日：1989-12-12
申请号：US288668
申请日：1988-12-22
申请人： Peter B. Roemer , William A. Edelstein , Cecil E. Hayes , Matthew G. Eash
发明人： Peter B. Roemer , William A. Edelstein , Cecil E. Hayes , Matthew G. Eash
IPC分类号： H01Q1/50 , A61B5/055 , G01R33/34 , G01R33/36
CPC分类号： G01R33/34046 , G01R33/3628
摘要： A method for providing plural coaxial cable connections, each to a different portion of a single radio-frequency (RF) antenna without requiring the use of isolation means at any RF connection, determines at least a point within the antenna having a desired common potential adjacent to each of the different portions to which one of the coaxial cable connections is to be made; Then forms a separate segment of each different portion which is located substantially at the common potential and is reactively separated from adjacent segments of the associated portion; and connects a shield conductor of an associated coaxial cable to the separate segment, while connecting a center conductor of that same associated coaxial cable to a selected one of the adjacent segments of that different portion.

35. 发明授权

US4871969A RF shield for RF coil contained within gradient coils of NMR imaging device 失效
标题翻译： RF屏蔽用于RF线圈，包含在NMR成像装置的梯度线圈内
公开(公告)号：US4871969A
公开(公告)日：1989-10-03
申请号：US288605
申请日：1988-12-22
申请人： Peter B. Roemer , William A. Edelstein
发明人： Peter B. Roemer , William A. Edelstein
IPC分类号： G01R33/385 , G01R33/422
CPC分类号： G01R33/422 , G01R33/385
摘要： An RF shield, for use between a set of gradient coils and an RF coil, is hollow formed of a single conductor sheet divided into first and second opposed halves, each having a set of conductive streamline portions with a series of nonconductive cut lines formed therebetween. Each of the cut lines is parallel to the RF current and is of a generally oval shape. Each of the shield conductor loops is further separated into a "C"-shaped conductive portion, along at least one radial line, and the C portions are then connected so as to continue shielding the RF current, yet pass gradient magnetic fields in all three mutually orthogonal directions of a Cartesian coordinate system.
摘要翻译：在一组梯度线圈和RF线圈之间使用的RF屏蔽件由分成第一和第二相对半部的单个导体片形成，其中每个具有一组导电流线部分，其间形成有一系列不导电的切割线。每个切割线平行于RF电流并且具有大致椭圆形的形状。每个屏蔽导体环路沿着至少一个径向线进一步分成“C”形导电部分，然后将C部分连接，以便继续屏蔽RF电流，然后在所有三个方向通过梯度磁场笛卡尔坐标系的相互正交方向。

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