专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO1998015226A1 METHOD AND APPARATUS FOR FORMING AND DISPLAYING IMAGE FROM A PLURALITY OF SECTIONAL IMAGES 审中-公开
标题翻译：用于从多个部分图像形成和显示图像的方法和装置
公开(公告)号：WO1998015226A1
公开(公告)日：1998-04-16
申请号：PCT/JP1997003174
申请日：1997-09-09
申请人： HITACHI MEDICAL CORPORATION , GOTO, Yoshihiro
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： A61B06/03
CPC分类号： G06T15/08 , G06T11/001 , G06T17/00 , G06T2207/30004
摘要： The virtual three-dimensional image of an observed object is formed by arranging a plurality of sectional images and projected from a viewpoint fixed to a predetermined position onto a projection plane which is fixed to a predetermined position to form and display a perspective image. The pixel value on the sectional image which is transversed by a projection line extending from the viewpoint to the projection plane are read and, if the read value coincides with one of a plurality of predetermined values, pixel data are recorded in a pixel recording region corresponding to that value in pixel value memories. While the projection line scans the pixels one by one on the projection plane, for each coming scanned pixel the pixel data are recorded. After all the data are recorded, the pixel data recorded in the pixel value memories are read out and the data are displayed on a display as a perspective image.
摘要翻译：观察对象的虚拟三维图像通过将多个截面图像排列并从固定于预定位置的视点投影到固定到预定位置的投影平面上以形成和显示透视图像而形成。读取由从视点延伸到投影平面的投影线横切的截面图像上的像素值，并且如果读取值与多个预定值中的一个一致，则将像素数据记录在相应的像素记录区域中到像素值记忆中的值。当投影线在投影平面上逐一扫描像素时，对于每个未来的扫描像素，记录像素数据。在记录所有数据之后，读出记录在像素值存储器中的像素数据，并将数据作为透视图像显示在显示器上。

2. 发明申请

WO1997050059A1 CENTRAL PROJECTION METHOD 审中-公开
标题翻译：中央投影方法
公开(公告)号：WO1997050059A1
公开(公告)日：1997-12-31
申请号：PCT/JP1997002162
申请日：1997-06-24
申请人： HITACHI MEDICAL CORPORATION , GOTO, Yoshihiro
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： G06T15/00
CPC分类号： G06T15/20
摘要： In a central projection method wherein a plurality of projection lines are extended conically from the visual point to project an object onto a projection plane, the visual point (e) is settled between the object (23) to be projected and projection plane (4) in a memory space, and the image of the object is projected onto the projection plane in the direction opposite to the direction of the projection lines (22), which extend from the visual point toward the object matter, along each projection line. In this method, a spherical surface (3) having an arbitrary radius (R) and the center on a visual line is defined, and projection points (Q, QR) of the object are determined on this spherical surface, and the projection points are then reprojected on the projection plane, whereby the correction of distortion is made.
摘要翻译：在其中多个投影线从视点向圆锥形延伸以将物体投射到投影平面上的中心投影方法中，将视点（e）设置在要投影的物体（23）和投影平面（4）之间，在存储空间中，并且将物体的图像沿与每个投影线从视点向物体延伸的投影线（22）的方向相反的方向投影到投影平面上。在该方法中，定义具有任意半径（R）和视线中心的球面（3），并且在该球面上确定物体的投影点（Q，QR），投影点然后重新投影在投影平面上，从而进行失真校正。

3. 发明申请

WO1997025726A1 SUPERCONDUCTING MAGNET DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE USING THE SAME 审中-公开
标题翻译：超导磁体装置和磁共振成像装置
公开(公告)号：WO1997025726A1
公开(公告)日：1997-07-17
申请号：PCT/JP1997000039
申请日：1997-01-10
申请人： HITACHI MEDICAL CORPORATION , TAKESHIMA, Hirotaka , KAWANO, Hajime , KAKUGAWA, Shigeru
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： H01F07/22
CPC分类号： G01R33/421 , G01R33/3806 , G01R33/3815 , G01R33/3873 , H01F6/00
摘要： A superconducting magnet device for magnetic resonance imaging, which has an opening wide enough to prevent the examinee from feeling confined and to enable the operator to have easy access to the examinee, wherein magnetic leakage is reduced. The superconducting magnet device is provided with two sets of superconducting coils opposed across a uniform magnetic field are. The return circuit of external magnetic fluxes generated by the superconducting coils is constituted by arranging discoid ferromagnetic bodies and cylindrical ferromagnetic bodies around the superconducting coils and a plurality of columnar ferromagnetic bodies between the facing cylindrical ferromagnetic bodies. Therefore, the magnet device can have an opening wide enough to prevent the examinee from feeling confined and to enable the operator to have easy access to the examinee. This device causes less magnetic leakage while the manufacturing cost is low.
摘要翻译：一种用于磁共振成像的超导磁体装置，其具有足够大的开口，以防止受试者受到限制，并且使得操作者能够容易地接近受检者，其中磁泄漏减少。超导磁体装置设有两组跨越均匀磁场的超导线圈。由超导线圈产生的外部磁通的返回电路通过将盘状铁磁体和圆柱形铁磁体布置在超导线圈周围以及在相对的圆柱形铁磁体之间的多个柱状铁磁体构成。因此，磁体装置可以具有足够的开口，以防止受试者受到限制，并且使得操作者能够容易地进入受检者。该装置在制造成本低的情况下导致较少的磁泄漏。

4. 发明申请

WO1997020326A1 SUPERCONDUCTING MAGNET DEVICE 审中-公开
标题翻译：超级磁铁设备
公开(公告)号：WO1997020326A1
公开(公告)日：1997-06-05
申请号：PCT/JP1996003512
申请日：1996-11-29
申请人： HITACHI MEDICAL CORPORATION , TAKESHIMA, Hirotaka , KAWANO, Hajime , KAKUGAWA, Shigeru , HINO, Noriaki
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： H01F07/22
CPC分类号： G01R33/3875 , G01R33/3806 , G01R33/3815 , G01R33/421
摘要： A superconducting magnet device for an MRI apparatus which has a wide opening where the subject lies so as to eliminate the feeling of being in an enclosed space. The magnetic field leakage, the weight of the device is light and a uniform strong magnetic field is created over a wide area. The static magnetic field generating source of the superconducting magnet device is constituted of two opposed sets of superconducting coil groups positioned on both sides of a uniform magnetic field generating area. Each coil group is composed of a main coil which makes an electric current to flow in a fixed direction, a compensation coil which makes another electic current to flow in the direction opposite to that of the electric current generated by the main coil, and a correction coil which corrects the uniformity of the magnetic field. The diameters of the main and compensation coils are nearly equal to each other and the diameters of the correction coil is smaller than that of the main coil. The quantity of the electric current generated by the correction coil is smaller than that of the electric current generated by the main coil. The distance between the two main coils is shorter than that between the two compensation coils.
摘要翻译：一种用于MRI装置的超导磁体装置，其具有被检者所在的宽开口，以消除处于封闭空间的感觉。磁场泄漏，器件的重量轻，在广泛的区域产生均匀的强磁场。超导磁体装置的静磁场发生源由位于均匀磁场产生区域两侧的两组相对的超导线圈组构成。每个线圈组由使得电流沿固定方向流动的主线圈组成，使得另一个电流沿与主线圈产生的电流相反的方向流动的补偿线圈和校正线圈，其校正磁场的均匀性。主和补偿线圈的直径几乎相等，校正线圈的直径小于主线圈的直径。由校正线圈产生的电流量小于由主线圈产生的电流的量。两个主线圈之间的距离比两个补偿线圈之间的距离短。

5. 发明申请

WO1996016597A1 MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
标题翻译：磁共振成像装置
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
申请人： HITACHI MEDICAL CORPORATION
发明人： HITACHI MEDICAL CORPORATION , TAKEKOSHI, Isamu , SAEGUSA, Masahito , OONUMA, Mitsuru , NINOMIYA, Atsushi , KATAYAMA, Atsushi , SATO, Shigeru , MAEDA, Tsuneo
IPC分类号： A61B05/055
CPC分类号： G01R33/3806 , A61B5/0555 , A61B5/7475
摘要： 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.
摘要翻译：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。

6. 发明申请

WO1991001684A1 IMAGE RECONSTRUCTION METHOD AND DEVICE FOR MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
标题翻译：用于磁共振成像装置的图像重建方法和装置
公开(公告)号：WO1991001684A1
公开(公告)日：1991-02-21
申请号：PCT/JP1990000984
申请日：1990-08-02
申请人： HITACHI MEDICAL CORPORATION , HITACHI, Ltd. , TAKEUCHI, Hiroyuki , NOZOKIDO, Tatsuo , SEKIHARA, Kensuke , KURODA, Masao , TAKESHIMA, Hirotaka , NAKAMURA, Chikako
发明人： HITACHI MEDICAL CORPORATION , HITACHI, Ltd.
IPC分类号： A61B05/055
CPC分类号： G01R33/56518 , A61B2017/00287
摘要： Measurement positions of measured magnetic resonance signals on a Fourier plane form a distorted square matrix due to influence of an inclined magnetic field which changes non-linearly due to eddy currents. According to present invention, the distortion is corrected by interpolation in order to obtain virtual data on a square matrix, the data corresponding to the measurement positions of magnetic resonance signals obtained when an idel inclined magnetic field is applied; and image data free from blur is obtained by Fourier transformation of the virtual data.
摘要翻译：由傅里叶平面测量的磁共振信号的测量位置由于涡流引起的非线性变化的倾斜磁场的影响而形成失真的方阵。根据本发明，通过内插来校正失真，以获得正方形矩阵上的虚拟数据，该数据对应于当施加空载倾斜磁场时获得的磁共振信号的测量位置; 并且通过虚拟数据的傅里叶变换获得没有模糊的图像数据。

7. 发明申请

WO1997035328A1 SUPERCONDUCTING MAGNET DEVICE AND METHOD FOR ADJUSTING MAGNETIZATION OF THE SAME 审中-公开
标题翻译：超导磁体装置及其调整方法
公开(公告)号：WO1997035328A1
公开(公告)日：1997-09-25
申请号：PCT/JP1997000951
申请日：1997-03-21
申请人： HITACHI MEDICAL CORPORATION , HONMEI, Takao , TAKESHIMA, Hirotaka , KAWANO, Hajime , TAKUMA, Yutaka , KOTABE, Munenori , MAKI, Naoki , HARA, Nobuhiro , KAKUGAWA, Shigeru , HINO, Noriaki
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： H01F07/22
CPC分类号： H01F6/00 , G01R33/3815
摘要： A small-sized highly precise superconducting magnet device such that the magnetic flux changes little with the time and quenching hardly occurs. A magnetization adjusting method for uniformly magnetizing such a magnet device is also disclosed. The superconducting magnet device has a coolant container, a permanent current retaining medium which is provided in the container and generates a magnetic flux in a uniform magnetic field region (FOV), a static magnetic field generating means composed of a plurality of cylindrical bodies made up of superconducting composite plates, a cylindrical body supporting base which supports the cylindrical bodies, and temperature adjusting elements (not shown in Fig. 67) buried in the cylindrical bodies. The static magnetic field generating means is magnetized by induction magnetization and the magnetization value is adjusted by controlling the temperatures of the cylindrical bodies by means of the temperature adjusting elements.
摘要翻译：一种小型高精度超导磁体装置，使得磁通量随时间变化很小，几乎不发生淬火。还公开了一种用于均匀磁化这种磁体装置的磁化调整方法。超导磁体装置具有冷却剂容器，设置在容器中的永久性电流保持介质，并产生均匀磁场区域（FOV）的磁通量，由多个圆柱体构成的静磁场产生装置的超导复合板，支撑圆柱体的圆柱体支撑基座和埋在圆柱体中的温度调节元件（图67中未示出）。静磁场产生装置通过感应磁化磁化，并且通过温度调节元件控制圆柱体的温度来调节磁化值。

8. 发明申请

WO1993018707A1 MAGNETIC FIELD GENERATOR FOR MRI 审中-公开
标题翻译：用于MRI的磁场发生器
公开(公告)号：WO1993018707A1
公开(公告)日：1993-09-30
申请号：PCT/JP1993000320
申请日：1993-03-17
申请人： SUMITOMO SPECIAL METALS COMPANY LIMITED , HITACHI MEDICAL CORPORATION , OTA, Kimiharu , AOKI, Masaaki , TAKEUCHI, Hiroyuki , MARUKAWA, Yasuhiro , TAKESHIMA, Hirotaka , NAKAMURA, Chikako
发明人： SUMITOMO SPECIAL METALS COMPANY LIMITED , HITACHI MEDICAL CORPORATION
IPC分类号： A61B05/055
CPC分类号： H01F7/0278 , A61B5/055 , G01R33/383
摘要： A magnetic field generator for MRI, wherein a plurality of permanent magnet elements are arranged into a ring on the inner surface of a yoke having a polygonal hollow. The present invention contemplates to reduce a leaking magnetic flux, to improve homogeneity of a magnetic field at a required portion, to reduce the occurrence of eddy currents without lowering homogeneity of the magnetic field inside a space, and to raise the intensity of a gradient magnetic field to a predeterminded intensity within a short time. Further, the present invention contemplates to provide a magnetic field generator for MRI which reduces the weight of a magnet, facilitates machining and production, and has a high working property. In the present invention, a plurality of permanent elements disposed on the inner surface of the yoke having a polygonal hollow are constituted by permanent magnet blocks having a direction of magnetization thereof perpendicular to the yoke contact suface, a principal magnetic field is generated by a pair of permanent magnet constituent members so disposed as to face each other and to have the direction of magnetization thereof in the same direction as the direction of the magnetic field of the homogeneous magnetic field formed at the center of the space, and provided with magnetic pole plates. Protrusion of permanent magnet plates having the direction of magnetization thereof in the same direction as the direction of the permanent magnet elements are disposed on gap opposing end surfaces at both end portions of an opening of the permanent magnet elements not provided with the magnetic pole plates. Each magnetic pole plate has a construction wherein protrusions are disposed on both ends of a base material, the protrusions and a surface layer portion near the protrusions are composed of a silicon steel sheet or a soft ferrite, and a central protrusion portion, the major proportion of which comprises a flat protrusion and which is composed of soft ferrite or silicon steel sheet is disposed at the center. A silicon steel laminate is disposed on the entire inner surface of the yoke other than the fitting surface of the pair of permanent magnet elements.
摘要翻译：一种用于MRI的磁场发生器，其中多个永磁体元件被布置在具有多边形中空部的轭的内表面上的环中。本发明考虑减少泄漏的磁通量以改善所需部分的磁场的均匀性，以减少涡流的发生而不降低空间内的磁场的均匀性，并提高梯度磁场的强度在短时间内到达预定的强度。此外，本发明考虑提供一种用于MRI的磁场发生器，其减小了磁体的重量，促进了加工和制造，并且具有高的加工性能。在本发明中，设置在具有多边形中空的轭的内表面上的多个永久性元件由具有与磁轭接触面垂直的磁化方向的永磁体块构成，主磁场由一对永磁体构成构件被设置为彼此面对并且具有与形成在空间中心的均匀磁场的磁场的方向相同的方向的磁化方向，并且设置有磁极板。具有与永磁体元件的方向相同方向的磁化方向的永磁体板的突出部设置在未设置有磁极板的永磁体元件的开口的两端部的间隙相对的端面上。每个磁极板具有这样的结构，其中突起设置在基材的两端，突起和突起附近的表面层部分由硅钢板或软铁氧体组成，中心突出部分主要部分其包括平坦的突起，并且由中心处设置有软铁氧体或硅钢板。除了一对永久磁铁元件的嵌合面以外，在轭铁的整个内表面上配置有硅钢层叠体。

9. 发明申请

WO1988007260A1 TARGET FOR X-RAY TUBE, A PROCESS FOR PRODUCING THE SAME, AND AN X-RAY TUBE 审中-公开
标题翻译： X射线管的目标，其生产方法和X射线管
公开(公告)号：WO1988007260A1
公开(公告)日：1988-09-22
申请号：PCT/JP1988000289
申请日：1988-03-18
申请人： HITACHI, LTD. , HITACHI MEDICAL CORPORATION , BABA, Noboru , NAKAGAWA, Yusaku , FUKUSHIMA, Masatake , SUWA, Masateru , INAMURA, Ichiro
发明人： HITACHI, LTD. , HITACHI MEDICAL CORPORATION
IPC分类号： H01J35/10
CPC分类号： H01J35/108 , H01J2235/084
摘要： An X-ray target comprising a graphite substrate (1) and an X-ray generating metal-coated layer (2), wherein a metallic intermediate layer (3) is provided at the interface between the graphite substrate (1) and the X-ray generating metal-coated layer (2), said metallic intermediate layer (3) being nonreactive with the graphite and having a coefficient of thermal expansion substantially equal to those of the graphite and the X-ray generating metal-coated layer (2) and being further allowed to infiltrate into the graphite substrate (1). The intermediate layer (3) has portions thereof that infiltrate into the graphite substrate (1) as deep as 10 microns or more. With the metallic intermediate layer (3) being infiltrated into the graphite substrate (1), the contact area increases greatly between the two so that the heat generated in the X-ray generating metal-coated layer (2) is quickly transmitted into the graphite substrate (1). Those portions of the metallic intermediate layer (3) infiltrated into the graphite substrate (1) work as wedges to prevent the X-ray generating metal-coated layer (2) from peeling off from the graphite substrate (1).

10. 发明申请

WO1997050058A1 METHOD AND APPARATUS FOR DETERMINING VISUAL POINT AND DIRECTION OF LINE OF SIGHT IN THREE-DIMENSIONAL IMAGE CONSTRUCTION METHOD 审中-公开
标题翻译：用于确定三维图像构造方法中的视点和方向线的方法和装置
公开(公告)号：WO1997050058A1
公开(公告)日：1997-12-31
申请号：PCT/JP1997002105
申请日：1997-06-19
申请人： HITACHI MEDICAL CORPORATION , GOTO, Yoshihiro , NAKAMURA, Hisako , SAITO, Makie , NAGAO, Tomohiro
发明人： HITACHI MEDICAL CORPORATION
IPC分类号： G06T15/00
CPC分类号： G06T15/20
摘要： A visual point is determined on an intersection of two arbitrary section conversion display (MPR) images, the direction of line of sight is displayed on the plane of either of the two arbitrary section conversion display images, and the geometric positional relation of the two arbitrary section conversion display images, their intersection, the visual point and the direction of line of sight are designated by a position input device such as a mouse so that re-arrangement of the geometric positional relation can be made.
摘要翻译：在两个任意部分转换显示（MPR）图像的交叉点上确定视点，视线方向显示在两个任意部分转换显示图像中的任一部分的平面上，并且两个任意部分转换显示截面转换显示图像，其交点，视点和视线方向由诸如鼠标的位置输入装置指定，使得可以重新排列几何位置关系。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式