公开(公告)号：US06891375B2

公开(公告)日：2005-05-10

申请号：US10187827

申请日：2002-07-02

申请人： Takao Goto ,  Kazuya Hoshino ,  Yuji Inoue ,  Masaaki Sakuma

发明人： Takao Goto ,  Kazuya Hoshino ,  Yuji Inoue ,  Masaaki Sakuma

IPC分类号： G01R33/387 ,  A61B5/055 ,  G01R33/383 ,  G01R33/389 ,  G01V3/00

CPC分类号： G01R33/389 ,  G01R33/387

摘要： The temperature of permanent magnet blocks embedded in several positions in permanent magnets and base yokes will be adjusted by device of a heater to improve the static field uniformity.

摘要翻译： 嵌入在永磁体和基架中的多个位置的永久磁铁块的温度将通过加热器的装置进行调节，以提高静电场均匀性。

公开(公告)号：US6011396A

公开(公告)日：2000-01-04

申请号：US2465

申请日：1998-01-02

申请人： Phillip William Eckels ,  Wanxian Wang ,  Bruce D. Collick ,  Kazuhiko Hayakawa ,  Kazuya Hoshino ,  Yuji Inoue

发明人： Phillip William Eckels ,  Wanxian Wang ,  Bruce D. Collick ,  Kazuhiko Hayakawa ,  Kazuya Hoshino ,  Yuji Inoue

IPC分类号： A61B5/055 ,  G01R33/38 ,  G01R33/383 ,  G01R33/387 ,  G01R33/3875 ,  H01F6/00 ,  G01V3/00

CPC分类号： G01R33/3806 ,  G01R33/383

摘要： An open architecture magnetic resonance imaging permanent magnet assembly with moveable magnets and adjustable field inclination with automatic magnetic field homogeneity shimming to enhance imaging and positioning of the magnetic field about the portion of the patient to be imaged while enabling interventional physician access.

摘要翻译： 具有可移动磁体的开放式结构磁共振成像永磁体组件和具有自动磁场均匀性匀场的可调磁场倾斜，以增强围绕要成像的患者部分的磁场的成像和定位，同时使介入医师进入。

公开(公告)号：US20080109623A1

公开(公告)日：2008-05-08

申请号：US11979357

申请日：2007-11-01

申请人： Kazuya Hoshino ,  Masato Yuzawa

发明人： Kazuya Hoshino ,  Masato Yuzawa

IPC分类号： G06F12/00

CPC分类号： G11C16/10 ,  G05B2219/24007 ,  G05B2219/2637

摘要： When a power switch is turned OFF, the execution of steady process is stopped, and backup data is written into a flash memory. If the power switch is turned ON during the writing of the backup data, the backup data writing execution is allowed to last for a predetermined time T1 after an instant when the power switch is turned ON, and if the writing of the backup data is not terminated at the time when the predetermined time T1 has elapsed, the writing of the backup data is interrupted so that the steady process is started for being executed.

摘要翻译： 当电源开关关闭时，停止执行稳定过程，并将备份数据写入闪存。 在备份数据的写入期间，如果电源开关被接通，则备用数据写入执行在电源开关接通之后允许持续预定时间T 1，并且备份数据的写入是 在经过预定时间T 1的时刻没有终止，备份数据的写入被中断，从而开始执行稳定处理。

公开(公告)号：US06650117B2

公开(公告)日：2003-11-18

申请号：US09811865

申请日：2001-03-19

申请人： Kazuya Hoshino ,  Kenji Sato

发明人： Kazuya Hoshino ,  Kenji Sato

IPC分类号： G01V300

CPC分类号： G01R33/341

摘要： With a view toward implementing an RF coil easy to uniformize the strength of a magnetic field, the RF coil is provided with a first current path group of wires including a plurality of linear current passes placed in parallel with one another, a second current pass group of wires placed so as to have the relations in mirror image with respect to the first current pass group, and a third current pass group of wires in which all the linear electrical passes are series-connected so as to be identical in current direction through both groups of the first and second current pass groups while bypassing the first and second current pass groups.

摘要翻译： 为了实现易于使磁场强度均匀化的RF线圈，RF线圈设置有包括彼此平行放置的多个线性电流通路的第一电流路径组，第二电流通道组 以与第一电流通路组成镜像关系的导线，以及其中所有线性电通路串联连接的电流的第三电流通过组，以使电流方向相同， 绕过第一和第二电流通过组的第一和第二电流通过组的组。

公开(公告)号：US4916396A

公开(公告)日：1990-04-10

申请号：US254679

申请日：1988-06-01

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54

CPC分类号： G01R33/482

摘要： There is disclosed a magnetic resonance imaging method which permits a scan to be made in a short time by collecting only the data that is used to reconstruct an image. The method is initiated by defining a circular region whose center lies at the point in a two-dimensional Fourier plane at which the spatial frequency is zero. The Fourier plane corresponds to a region containing an image to be reconstructed. The spin echo signals emanating from a region inside the circular region are observed by an ordinary Fourier method, said region having a length greater than a predetermined length as measured in the direction in which data obtained by the observation is read out. The spin echo signals emanating from the remaining region inside the circular region are observed while shortening the time for which a reading gradient magnetic field is applied whenever an excitation is effected and, at the same time, effecting an additional phase shift encoding.

公开(公告)号：US4894616A

公开(公告)日：1990-01-16

申请号：US251213

申请日：1988-09-27

申请人： Eiji Yoshitome ,  Kazuya Hoshino ,  Susumu Kosugi

发明人： Eiji Yoshitome ,  Kazuya Hoshino ,  Susumu Kosugi

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/483

CPC分类号： G01R33/4838

摘要： An improved selective excitation method applicable to NMR imaging, regardless of the NMR signal generation method used, wherein a non-scanned subject area is excited using an RF signal, then the excited area is spoiled with a gradient magnetic field to create an area that receives no other excitation RF signal for a set period, and then NMR signals are collected from the unspoiled area using a conventional method.

公开(公告)号：US4786871A

公开(公告)日：1988-11-22

申请号：US65358

申请日：1987-06-23

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/561 ,  G01R33/20

CPC分类号： G01R33/482 ,  G01R33/561

摘要： An NMR imaging method and apparatus according to the present invention which enables collection of data to be effected within a minimum scanning time which can be desired for each object of inspection is arranged such that projection data concerning the object is collected from a plurality of directions, a direction in which the number of samples in the warp direction is minimized is obtained on the basis of the collected projection data, and then the scanning coordinate system is rotated in accordance with the obtained direction to collect data on the basis of the Fourier transformation method.

公开(公告)号：US06297636B1

公开(公告)日：2001-10-02

申请号：US09481073

申请日：2000-01-11

申请人： Yukitoshi Shimo ,  Kazuya Hoshino

发明人： Yukitoshi Shimo ,  Kazuya Hoshino

IPC分类号： G01V300

CPC分类号： G01R33/34076 ,  G01R33/288 ,  G01R33/341 ,  G01R33/3678

摘要： In order to generate an RF magnetic field efficiently, an RF coil is used comprising electric paths 612 carrying electric current for generating the RF magnetic field within a space containing a subject, and an annular electric path 614 located farther from the subject than the electric paths 612 from the subject, for linking respective ends of the electric paths 612.

摘要翻译： 为了有效地产生RF磁场，使用RF线圈，其包括承载用于在包含被摄体的空间内产生RF磁场的电流的电路612，以及位于比物体的电路更远离的环形电路614 612，用于连接电路径612的相应末端。

公开(公告)号：US4982159A

公开(公告)日：1991-01-01

申请号：US320266

申请日：1989-01-10

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/565

CPC分类号： G01R33/56563

摘要： A method for correcting distortion of a reconstructed image caused by non-uniformity of a static magnetic field in an NMR imaging apparatus, wherein the non-uniformity of a three-dimensional static magnetic field is measured, and the measurement data is stored in the form of a matrix having a size smaller than the size of a matrix used in image reconstruction; then, data on a two-dimensional plane, corresponding to a slice plane of the reconstruction image, is taken out from the matrix, and based on that data, a distortion correcting table is produced and is enlarged to agree with the size of the matrix used in image reconstruction, so that distortion of the reconstructed image is corrected using the enlarged distortion correcting table.

公开(公告)号：US4713614A

公开(公告)日：1987-12-15

申请号：US831342

申请日：1986-02-20

申请人： Kazuya Hoshino ,  Hiroyuki Matsuura

发明人： Kazuya Hoshino ,  Hiroyuki Matsuura

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/565 ,  G01R33/58 ,  H04N5/16 ,  G01R33/20

CPC分类号： G01R33/565 ,  G01R33/58

摘要： A method of simultaneously correcting distortion in density due to uneven sensitivity of receiving coils, and location dependent phase distortion inherent in the system, wherein a phantom is scanned to determine echo signals, which echo signals are subjected to 2-dimensional inverse Fourier transformation, to obtain an image (Cij) and stored as it is in the form of a complex number, then the object to be examined is measured by similar operation to obtain an image (Oij) and wherein the image (Oij) is divided by computation with image (Cij) as follows .vertline.Sij.vertline.=.vertline.Oij.vertline./.vertline.Cij.vertline., by which equation computation is made to correct for density distortion, and wherein the angle of deviation is set as follows arg [Sij]=arg[Oij]-arg[Cij].ident.0, by which equation computation is made to correct for phase distortion. An image of the object is thus obtained which is corrected for density distortion and for phase distortion, by taking the real number part of the image Sij which is the determined image of the object.

摘要翻译： 一种同时校正由于接收线圈的灵敏度不均匀引起的密度变形的方法以及系统中固有的位置相关相位失真的方法，其中扫描体模以确定回波信号经受二维傅里叶逆变换的回波信号， 获取图像（Cij）并以复数形式存储，然后通过类似的操作测量待检查对象以获得图像（Oij），并且其中图像（Oij）被图像计算分割 （Cij）如下| Sij| = | Oij| / | Cij|，通过该方程计算来校正密度失真，并且其中偏差角度被设置如下：arg [Sij] = arg [Oij] -arg [Cij] = 0，通过该方程计算来校正相位失真。 由此获得对象的图像，其通过获取作为对象的确定图像的图像Sij的实数部分来校正密度失真和相位失真。