公开(公告)号：WO1993022967A1

公开(公告)日：1993-11-25

申请号：PCT/JP1993000645

申请日：1993-05-17

Applicant: YOKOGAWA MEDICAL SYSTEMS, LTD. ,  HAYANO, Yuichi ,  KOSUGI, Susumu

Inventor： YOKOGAWA MEDICAL SYSTEMS, LTD.

IPC: A61B05/055

CPC classification number: G01R33/56554 ,  G01R33/5615 ,  G01R33/5617

Abstract: The step in the signal intensity formed by T2 attenuation in the DC view does not mar the image quality, and the contrast of the MRI image is not a mixture of different constrasts. Offset phase gradient is so added to each of the phase gradients that the DC view is a view in the vicinity of the center of one block. Hence, the low frequency region is settled in one block.

Abstract translation: 在DC视图中由T2衰减形成的信号强度的步骤不损害图像质量，并且MRI图像的对比度不是不同约束的混合。 偏移相位梯度因此被添加到每个相位梯度，DC视图是在一个块的中心附近的视图。 因此，低频区域被安置在一个块中。

公开(公告)号：WO1993011702A2

公开(公告)日：1993-06-24

申请号：PCT/JP1992001637

申请日：1992-12-15

Applicant: YOKOGAWA MEDICAL SYSTEMS, LTD. ,  YOSHITOME, Eiji ,  IKEZAKI, Yoshikazu

Inventor： YOKOGAWA MEDICAL SYSTEMS, LTD.

IPC: A61B05/055

CPC classification number: G01R33/563 ,  G01R33/56

公开(公告)号：WO1993007805A1

公开(公告)日：1993-04-29

申请号：PCT/JP1992001333

申请日：1992-10-13

Applicant: YOKOGAWA MEDICAL SYSTEMS, LTD. ,  HOSHINO, Kazuya

Inventor： YOKOGAWA MEDICAL SYSTEMS, LTD.

IPC: A61B05/055

CPC classification number: G01R33/3614

Abstract: An object of this invention is to provide an RF driving circuit in an MR apparatus capable of controlling a driving voltage of an RF coil inclusive of correction of quadrature unbalance. In an RF driving circuit for quadrature driving of an RF coil of an MR apparatus, the RF driving circuit in the MR apparatus according to the present invention comprises voltage monitor means for monitoring voltages at 0 DEG and 90 DEG ports of an RF coil; feedback voltage generation means for generating a feedback voltage corresponding to a component of a rotating magnetic field generated in the RF coil by the voltages of the 0 DEG and 90 DEG ports monitored, the component being in a rotating direction coupling with a spin system; and driving voltage control means for controlling a driving voltage supplied to the RF coil on the basis of the feedback voltage.

Abstract translation: 本发明的目的是提供一种能够控制包括纠正正交不平衡的RF线圈的驱动电压的MR装置中的RF驱动电路。 在用于正交驱动MR装置的RF线圈的RF驱动电路中，根据本发明的MR装置中的RF驱动电路包括用于监视RF线圈0°和90°端口处的电压的电压监视装置; 反馈电压产生装置，用于通过监测的0°和90°端口的电压产生对应于在RF线圈中产生的旋转磁场的分量的反馈电压，该组件处于与旋转系统耦合的旋转方向; 以及驱动电压控制装置，用于根据反馈电压来控制提供给RF线圈的驱动电压。

公开(公告)号：WO1992011807A1

公开(公告)日：1992-07-23

申请号：PCT/US1992000304

申请日：1992-01-07

Applicant: THE BETH ISRAEL HOSPITAL ASSOCIATION

Inventor： THE BETH ISRAEL HOSPITAL ASSOCIATION ,  FOSSEL, Eric, T.

IPC: A61B05/055

CPC classification number: A61K49/06 ,  G01R33/465

Abstract: A method is disclosed for the detecting and localizing cancer using nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI). Specifically, NMR parameters for protons of lipid methyl and/or methylene groups are determined and compared against a corresponding value for healthy patients. In the preferred embodiments, an NMR spectrometer apparatus is employed to provide a spectrum for non-water components of blood, blood serum or blood plasma and the width of the methyl and/or methylene groups is measured at half-height as a determination of spin-spin relaxation time (T2) which is the parameter used for purposes of comparison with healthy controls. The water proton signal is suppressed where necessary in order to obtain a suitable spectrum for the non-water component protons. In the event that a positive reading is obtained at the proton NMR stage, the level of plasma triglycerides is determined and if it is normal the patient is diagnosed as having cancer and subjected to whole body MRI to determine the location of malignancies. If however, the triglyceride level ishigh, the patient's body fluid sample is further subjected to C-13 nuclear magnetic spectroscopy. The resonance line of the plasma C-13 discriminates between true and false positive results from the proton NMR reading and determines the presence or absence of cancer in the patient. If cancer is detected at this step the patient is subjected to whole body magnetic resonance imaging to locate malignancies.

Abstract translation: 公开了一种使用核磁共振（NMR）光谱和磁共振成像（MRI）检测和定位癌症的方法。 具体地，确定脂质甲基和/或亚甲基的质子的NMR参数，并将其与健康患者的相应值进行比较。 在优选的实施方案中，使用NMR光谱仪装置来提供血液，血清或血浆的非水分量的光谱，并且在半高度处测量甲基和/或亚甲基的宽度作为旋转测定 旋转松弛时间（T2），其是用于与健康对照进行比较的参数。 为了获得非水组分质子的合适谱，必要时抑制水质子信号。 如果在质子NMR阶段得到阳性读数，则测定血浆甘油三酯的水平，如果是正常的，则诊断患有癌症并进行全身MRI以确定恶性肿瘤的位置。 然而，如果甘油三酯水平较高，则患者的体液样品进一步经受C-13核磁光谱。 等离子体C-13的共振线区分质子NMR读数的真实和假阳性结果，并确定患者是否存在癌症。 如果在该步骤中检测到癌症，则患者进行全身磁共振成像以定位恶性肿瘤。

公开(公告)号：WO1992003089A1

公开(公告)日：1992-03-05

申请号：PCT/US1991005869

申请日：1991-08-19

Applicant: THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA

Inventor： THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ,  AXEL, Leon ,  SHINNAR, Meir

IPC: A61B05/055

CPC classification number: G01R33/56333 ,  G01R33/56509

Abstract: A technique for generating "optimal" radio frequency pulses for use in creating SPAMM imaging stripes and for quantitatively determining the displacements of the imaging stripes during a pre-imaging interval. The imaging operator selects the desired stripe parameters (304) so that the resulting SPAMM imaging stripe will have the desired narrowness, sharpness, flatness and the like. These parameters are then used by an optimal pulse generating system (212) to generate the input radio frequency pulse sequence which will produce the desired stripes. Tagging of the heart wall or some other soft tissue structure with a grid of planes of altered magnetization is then used to provide finite element analysis to quantify regional heart wall motion and the like. The intersections of the tagging stripes are used as a set of fiducial marks within the heart wall, and the motion of these intersections through the heart cycle is used to track the motion of the underlying tissue.

Abstract translation: 一种用于产生用于创建SPAMM成像条带的“最佳”射频脉冲并用于在预成像间隔期间定量确定成像条带的位移的技术。 成像操作者选择期望的条纹参数（304），使得所得到的SPAMM成像条纹将具有期望的狭窄，锐度，平坦度等。 这些参数然后被最佳脉冲发生系统（212）用于产生将产生期望条纹的输入射频脉冲序列。 然后使用具有改变磁化面的网格的心壁或一些其他软组织结构的标记来提供有限元分析以量化区域心脏壁运动等。 标记条纹的交点用作心壁内的一组基准标记，并且通过心脏周期的这些交叉点的​​运动用于跟踪下面组织的运动。

公开(公告)号：WO1990007301A1

公开(公告)日：1990-07-12

申请号：PCT/DE1989000783

申请日：1989-12-21

Applicant: BRUKER MEDIZINTECHNIK GMBH ,  KNÜTTEL, Bertold

Inventor： BRUKER MEDIZINTECHNIK GMBH

IPC: A61B05/055

CPC classification number: A61B5/055 ,  G01R33/283

Abstract: During magnetic resonance whole-body tomography, the patient must remain for long periods inside the central tube (5) of a magnetic system (1). Because of the considerable length and narrow diameter of the tube (5), this experience is often unpleasant for the patient. According to the invention, an optical device installed in the tube (5) of the magnetic system (1) comprises an ocular (7) arranged in front of the patient's eyes (4) and a device (8, 9) which produces an image on the focal plane of the ocular (7). Depending on the type of imaging device (8, 9) used, the patient can observe the surroundings or watch entertainment programs. The patient no longer feels isolated and/or the examination time seems shorter.

公开(公告)号：WO1999033398A1

公开(公告)日：1999-07-08

申请号：PCT/JP1997004868

申请日：1997-12-26

Applicant: SUMITOMO SPECIAL METALS CO., LTD. ,  SAKURAI, Hideya ,  AOKI, Masaaki

Inventor： SUMITOMO SPECIAL METALS CO., LTD.

IPC: A61B05/055

CPC classification number: G01R33/381 ,  G01R33/3806

Abstract: An MRI magnetic field generator which does not give a subject an offensive feeling, generates a uniform static magnetic field in an imaged space stably, and produces a clear image with a high sensitivity while its size is small and its cost is low. A magnetic field reinforcing coil (14) is attached to the peripheral parts of a pair of pole pieces which face each other with a gap therebetween. Hence the adjustment of the magnetic field intensity is possible with a simple construction without changing the form of a magnetic circuit and increasing the weight and area of a magnet. Further, the direction of a current applied to the coil is adjusted to enable the adjustment of the magnetic field distribution and the improvement of the magnetic field uniformity.

Abstract translation: MRI磁场发生器不会使被摄体具有令人反感的感觉，在成像空间中稳定地产生均匀的静磁场，并且在其尺寸小且成本低的情况下产生具有高灵敏度的清晰图像。 一个磁场加强线圈（14）安装在一对磁极片的周向部分上，它们彼此面对地间有间隙。 因此，通过简单的结构可以进行磁场强度的调整，而不改变磁路的形状并增加磁体的重量和面积。 此外，调整施加到线圈的电流的方向，使得能够调整磁场分布和提高磁场均匀性。

公开(公告)号：WO1999033397A1

公开(公告)日：1999-07-08

申请号：PCT/JP1997004867

申请日：1997-12-26

Applicant: SUMITOMO SPECIAL METALS CO., LTD. ,  AOKI, Masaaki ,  HASHIMOTO, Shigeo

Inventor： SUMITOMO SPECIAL METALS CO., LTD.

IPC: A61B05/055

CPC classification number: G01R33/383 ,  G01R33/3873

Abstract: An MRI magnetic field generator comprising a pair of pole pieces and an inclined magnetic field coil which is attached to the pair of the pole pieces. The adjustment of the magnetic field uniformity within the imaged field of view of a gap can be made safely and easily without removing the inclined magnetic field coil. After a holder disc (13) is put on a base disc (11) and fixed, magnetic material small pieces or permanent magnet small pieces for the adjustment of the magnetic field uniformity are inserted into the necessary positions of pits which are arranged in a predetermined pattern. Then spacers are inserted into the space between the holder disc (13) and a cover disc in the pits as necessary, positioned and fixed with screws to form a unified shim holder (10) which is aligned with the inclined magnetic field coil (6) or its support and fixed.

Abstract translation: 一种MRI磁场发生器，包括一对极片和一个安装在一对极片上的倾斜磁场线圈。 在没有去除倾斜磁场线圈的情况下，可以安全且容易地进行在成像视场内的磁场均匀性的调整。 在保持盘（13）被放置在基盘（11）上并固定之后，将用于调整磁场均匀性的磁性材料小件或永久磁铁小件插入到以预定的方式布置的凹坑的必要位置 模式。 然后根据需要将间隔件插入保持盘（13）和凹坑中的盖盘之间的空间中，用螺钉定位和固定，以形成与倾斜磁场线圈（6）对准的统一的垫片支架（10） 或其支持和固定。

公开(公告)号：WO1998002092A1

公开(公告)日：1998-01-22

申请号：PCT/IB1997000681

申请日：1997-06-12

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  OOSTERWAAL, Lambertus, Johannes, Maria, Petrus

IPC: A61B05/055

CPC classification number: G01R33/28 ,  A61B5/0555 ,  G01R33/281 ,  G01R33/565

Abstract: The apparatus comprises an examination zone (29) for receiving an object (37) to be examined, a component (41) of an electrically non-conductive plastics material being located in the examination zone at least when the apparatus is in an operating condition. In order to reduce the visibility of this component (41) in MR experiments, the plastics material comprises an additive of a paramagnetic material.

Abstract translation: 该装置包括用于接收被检查物体（37）的检查区（29），至少在设备处于操作状态时位于检查区中的不导电塑料的部件（41）。 为了在MR实验中降低该组分（41）的可视性，塑料材料包括顺磁材料的添加剂。

公开(公告)号：WO1996016597A1

公开(公告)日：1996-06-06

申请号：PCT/JP1995002380

申请日：1995-11-22

Applicant: HITACHI MEDICAL CORPORATION

Inventor： HITACHI MEDICAL CORPORATION ,  TAKEKOSHI, Isamu ,  SAEGUSA, Masahito ,  OONUMA, Mitsuru ,  NINOMIYA, Atsushi ,  KATAYAMA, Atsushi ,  SATO, Shigeru ,  MAEDA, Tsuneo

IPC: A61B05/055

CPC classification number: G01R33/3806 ,  A61B5/0555 ,  A61B5/7475

Abstract: A magnetic resonance imaging apparatus comprises an examination bed having one magnetic pole therein and an upper flat surface, a top portion having the other magnetic pole therein and a lower surface which faces the upper surface of the examination bed, a bed disposed adjacent to the examination bed, and a pair of struts provided on both sides of the examination bed for connecting the examination bed and the top portion to each other by themselves. A space between the lower surface of the top portion and the upper surface of the examination bed is opened at least between the right and left struts on a side of the bed.

Abstract translation: 磁共振成像装置包括：检查床，其中具有一个磁极，上部平坦表面，具有另一个磁极的顶部和面向检查台的上表面的下表面;与检查相邻设置的床 床和设在检查台两侧的一对支柱，用于将检查床和顶部部分彼此自身连接起来。 顶部的下表面和检查台的上表面之间的空间至少在床的一侧的左右支柱之间打开。