公开(公告)号：US06889070B2

公开(公告)日：2005-05-03

申请号：US09987337

申请日：2001-11-14

Applicant: Munetaka Tsuda

Inventor： Munetaka Tsuda

IPC: A61B5/055 ,  G01R33/28 ,  G01R33/38 ,  G01R33/381 ,  G01R33/421 ,  H01F5/00 ,  H01F6/00

CPC classification number: G01R33/421 ,  G01R33/3806 ,  Y10T29/4902 ,  Y10T29/49075

Abstract: Magnetic resonance imaging apparatus having a pair of a first magnet device and a second magnet device for generating a magnetostatic field, the pair of magnet devices being installed opposite each other across an examination space for accommodating an examinee; a gradient-field generating device; a high-frequency field generating device; and a yoke for combining the first and second magnetic devices to guide magnetic fluxes generated by the first and second magnetic devices to thereby form a closed magnetic circuit, wherein the yoke includes a first plate member fixed to a first magnet device, a second plate member fixed to a second magnet device and one or more support-post members interconnecting the first plate member and the second plate member, each of the first and second plate members and support-post members includes a plurality of segments formed in a predetermined shape.

Abstract translation: 一种具有一对第一磁体装置和用于产生静磁场的第二磁体装置的磁共振成像装置，所述一对磁体装置横跨用于容纳受检者的检查空间彼此相对地安装; 梯度场产生装置; 高频场产生装置; 以及用于组合第一和第二磁性装置以引导由第一和第二磁性装置产生的磁通量从而形成闭合磁路的磁轭，其中磁轭包括固定到第一磁体装置的第一板构件，第二板构件 固定到第二磁体装置和互连第一板构件和第二板构件的一个或多个支撑柱构件，第一和第二板构件和支撑柱构件中的每一个包括以预定形状形成的多个区段。

公开(公告)号：US06748749B2

公开(公告)日：2004-06-15

申请号：US10096453

申请日：2002-03-13

Applicant: Munetaka Tsuda

Inventor： Munetaka Tsuda

IPC: F17G1302

CPC classification number: G01R33/3815 ,  G01R33/3806

Abstract: Within upper and lower cryostats for a super conducting magnet level sensors which measure respective amounts of liquid helium therein are assembled and are connected to a measuring circuit. When a control signal of a computer is provided to the measurement circuit via a sequencer, the measurement circuit performs automatic measurement of a remaining amount of liquid helium and the measured data is transferred to the computer. The computer records the measured data as well as performs computation processing thereof and causes a display unit to display the processing result as an effective management parameter of the liquid helium. Thereby, an open type MRI apparatus using a super conducting magnet with liquid helium monitoring system which is suitable for maintenance and management of liquid helium for the super conducting magnet can be provided.

Abstract translation: 在用于测量其中的相应量的液氦的超导电磁体水平传感器的上下低温恒温器中，组装并连接到测量电路。 当通过定序器将计算机的控制信号提供给测量电路时，测量电路执行液体氦剩余量的自动测量，并将测量数据传送到计算机。 计算机记录测量数据并执行其计算处理，并使显示单元将处理结果显示为液氦的有效管理参数。 因此，可以提供一种使用具有液氦监测系统的超导磁体的开放式MRI装置，其适用于超导磁体的液氦的维护和管理。

公开(公告)号：US5109198A

公开(公告)日：1992-04-28

申请号：US469916

申请日：1990-01-24

Applicant: Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno ,  Munetaka Tsuda ,  Toshihiro Ishizuka

Inventor： Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno ,  Munetaka Tsuda ,  Toshihiro Ishizuka

IPC: G01R33/34

CPC classification number: G01R33/34046

Abstract: In a nuclear magnetic resonance imaging apparatus including a first probe circuit for detecting magnetic flux in a first direction and a second probe circuit for detecting magnetic flux in a direction perpendicular to the first direction, the arm angle of conductor arms to form the first probe circuit and the arm angle of conductor arms to form the second probe circuit are different from each other.

Abstract translation: 在包括用于检测第一方向的磁通的第一探针电路和用于检测与第一方向垂直的方向上的磁通的第二探针电路的核磁共振成像装置中，形成第一探针电路的导体臂的臂角 并且形成第二探针电路的导体臂的臂角彼此不同。

公开(公告)号：US4757260A

公开(公告)日：1988-07-12

申请号：US809909

申请日：1985-12-17

Applicant: Munetaka Tsuda ,  Kazutoshi Higuchi

Inventor： Munetaka Tsuda ,  Kazutoshi Higuchi

IPC: A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/50 ,  G01R33/54 ,  G01R33/20

CPC classification number: G01R33/4835 ,  G01R33/50

Abstract: A plurality of selective radio frequency .pi. pulses are applied to an object placed in a static magnetic field which has a magnetic field gradient, to select a plurality of slices of the object corresponding to these pulses. Nuclear magnetic resonance signals are generated from the slices in a manner that a time interval between the selection of slice and the generation of nuclear magnetic resonance signal remains substantially constant for all of the slices.

Abstract translation: 多个选择性射频pi脉冲被施加到放置在具有磁场梯度的静态磁场中的物体上，以选择对应于这些脉冲的物体的多个片段。 以切片的选择和核磁共振信号的产生之间的时间间隔对于所有切片保持基本上恒定的方式从切片产生核磁共振信号。