HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING DEVICE EMPLOYING SAME
    81.
    发明申请
    HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING DEVICE EMPLOYING SAME 有权
    使用其的高频线圈和磁共振成像装置

    公开(公告)号:US20130119991A1

    公开(公告)日:2013-05-16

    申请号:US13811979

    申请日:2011-07-25

    IPC分类号: G01R33/34

    摘要: A technique is provided to reserve large examination space in the tunnel type MRI apparatus, without increasing production cost nor reducing significantly irradiation efficiency and homogeneity in an irradiation distribution within an imaging region. The present invention provides an RF coil unit in which four partial cylindrical coils are placed with a gap therebetween in the circumferential direction inside a cylindrical RF shield, in such a manner that two pairs of the partial cylindrical coils are opposed to each other, and magnetic fields produced by the individual partial cylindrical coils are combined, thereby producing a circularly polarized wave field or an elliptically polarized wave field. The partial cylindrical coil is provided with a partial cylindrical conductor, multiple first conductors substantially parallel with the central axis of the RF shield, multiple capacitors connecting both ends of the first conductors with the partial cylindrical conductor, and a second conductor adjacent to at least one of the ends of the first conductor. The partial cylindrical coils are respectively provided with high frequency signals having a desired amplitude ratio and phase difference, while a reference frequency thereof being identical.

    摘要翻译: 提供了一种在隧道式MRI装置中预留大的检查空间的技术,而不增加成本区域内的照射分布的生产成本,降低照射效率和均匀性。 本发明提供了一种RF线圈单元,其中四个部分圆柱形线圈在圆柱形RF屏蔽内沿圆周方向放置有间隙,使得两对部分圆柱形线圈彼此相对,并且磁性 由各个部分圆柱形线圈产生的磁场组合,从而产生圆偏振波场或椭圆偏振波场。 部分圆柱形线圈设置有部分圆柱形导体,多个第一导体基本上平行于RF屏蔽的中心轴线,多个电容器连接第一导体的两端与部分圆柱形导体,第二导​​体与至少一个 的第一导体的端部。 部分圆柱形线圈分别设置有具有期望的振幅比和相位差的高频信号,而其参考频率相同。

    HIGH-FREQUENCY COIL UNIT AND MAGNETIC RESONANCE IMAGING DEVICE
    82.
    发明申请
    HIGH-FREQUENCY COIL UNIT AND MAGNETIC RESONANCE IMAGING DEVICE 有权
    高频线圈单元和磁共振成像装置

    公开(公告)号:US20120262173A1

    公开(公告)日:2012-10-18

    申请号:US13512090

    申请日:2010-11-29

    IPC分类号: G01R33/34 G01R33/48

    摘要: There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.

    摘要翻译: 提供了一种用于在隧道式MRI装置中确保大的检查空间的技术,而不会增加制造成本,并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。 在部分圆柱形RF线圈的两个梯级之间,该线圈对应于部分被去除的圆柱形RF线圈,设置有产生磁场的半环,该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。 此外,具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。

    Magnetic resonance imaging method and apparatus
    83.
    发明授权
    Magnetic resonance imaging method and apparatus 有权
    磁共振成像方法和装置

    公开(公告)号:US07821267B2

    公开(公告)日:2010-10-26

    申请号:US11916130

    申请日:2006-05-30

    IPC分类号: G01V3/00

    摘要: In an imaging according to the step moving method, a slice imaging condition with respect to each station is optimized, thereby enabling an efficient imaging. A controller of an MRI apparatus displays positioning frames 601 to 606, and operation handles 607 and 608 thereof, in order to set a slice imaging condition at every various positions (stations) of a table on which a test object is mounted. By manipulating the positioning frames and the operation handles via I/O unit, the slice imaging condition is set. According to this slice imaging condition, imaging at each station position of the table is executed.

    摘要翻译: 在根据步进移动方法的成像中,优化相对于每个站的切片成像条件,从而能够进行有效的成像。 MRI装置的控制器显示定位帧601至606及其操作手柄607和608,以便在安装有测试对象的表的每个各个位置(站)处设置切片成像条件。 通过I / O单元操作定位框和操作手柄,设置切片成像条件。 根据该切片成像条件,执行表的各台位置的成像。

    Magnetic resonance imaging method and device
    84.
    发明授权
    Magnetic resonance imaging method and device 失效
    磁共振成像方法及装置

    公开(公告)号:US06728568B1

    公开(公告)日:2004-04-27

    申请号:US09980433

    申请日:2002-05-10

    IPC分类号: A61B5055

    摘要: In order to improve image quality in MRI using an EPI method without extending imaging time excessively, reference data is acquired in the absence of substantial phase encoding gradients by using an EPI sequence in combination with an echo shift (ETS) method, at times related to the timing of echo signals for image data. The reference data is used for phase correcting the image data acquired with application of phase encoding. The reference data can be measured for a single shot, or a few shots, and used to estimate reference data for the rest of the shots in which imaging data is acquired.

    摘要翻译: 为了使用EPI方法在不延长成像时间的情况下提高MRI中的图像质量,通过使用EPI序列与回波移位(ETS)方法组合,在没有实质相位编码梯度的情况下获取参考数据,有时与 图像数据的回波信号的定时。 参考数据用于相位校正通过应用相位编码获取的图像数据。 可以对单次拍摄或几次拍摄来测量参考数据,并且用于估计拍摄成像数据的其余拍摄的参考数据。

    Magnetic resonance imaging device
    85.
    发明授权
    Magnetic resonance imaging device 失效
    磁共振成像装置

    公开(公告)号:US06615069B1

    公开(公告)日:2003-09-02

    申请号:US09719805

    申请日:2000-12-18

    IPC分类号: A61B505

    CPC分类号: G01R33/4804

    摘要: An MRI apparatus and method in which image data is produced using NMR signals obtained in plural measurements performed at different times respectively. Data is calculated indicating temperature distribution within the object for image data of each measurement time and spatial discontinuity of the calculated temperature distribution data is corrected. Temperature change distribution within the object between different measurement times is calculated by subtracting the corrected temperature distribution data of each measurement time, and the calculated temperature change distribution is transformed to indicative data for supply to a display for display.

    摘要翻译: 一种MRI装置和方法,其中使用在不同时间执行的多次测量中获得的NMR信号来产生图像数据。 计算表示每个测量时间的图像数据的对象内的温度分布的数据,并且校正计算出的温度分布数据的空间不连续性。 通过减去每个测量时间的校正温度分布数据来计算对象内不同测量时间之间的温度变化分布,并将计算出的温度变化分布变换为用于显示的供应的指示数据。

    Nuclear magnetic resonance apparatus
    88.
    发明授权
    Nuclear magnetic resonance apparatus 失效
    核磁共振装置

    公开(公告)号:US5280246A

    公开(公告)日:1994-01-18

    申请号:US793456

    申请日:1991-11-18

    IPC分类号: G01R33/3415 G01V3/00

    CPC分类号: G01R33/3415

    摘要: A nuclear magnetic resonance apparatus receives nuclear magnetic resonance signals from an object under test with an RF probe which is an array of coils, implements down-frequency conversion with frequency converters for the received signals in multiple channels such that the frequency bands of the converted signals do not virtually overlap, filters the converted signals with band pass filters each operating to cut off frequency bands of other channels, hybridizes the filtered signals of multiple channels to form a hybridized signal, and produces an image from the hybridized signal.

    摘要翻译: 核磁共振装置使用作为线圈阵列的RF探头从被测物体接收核磁共振信号,利用频率转换器对多个通道中的接收信号进行低频转换,使得转换信号的频带 不要虚地重叠,用带通滤波器对转换的信号进行滤波,每个带通滤波器各自操作以切断其他信道的频带,将多个信道的滤波信号杂交以形成杂交信号,并从杂交信号产生图像。

    Projection detecting apparatus for computer tomography
    89.
    发明授权
    Projection detecting apparatus for computer tomography 失效
    用于计算机断层扫描的投影检测装置

    公开(公告)号:US5164973A

    公开(公告)日:1992-11-17

    申请号:US637638

    申请日:1991-01-04

    摘要: A projection detecting apparatus for use in a third generation X-ray computer tomography includes an X-ray source and a detector array both mounted on a rotatable gantry for detecting X-ray projections of an object under inspection sequentially at a plurality of angles of the gantry, respectively. The detector array is formed by disposing consecutively a plurality of detector element blocks each constituted by a photodiode array and a scintillator array laminated together. The element blocks are so disposed as to be asymmetric to the center line of a fan-like radiation beam which line extends through the position of the X-ray source and the center of rotation of the gantry.

    摘要翻译: 用于第三代X射​​线计算机断层摄影的投影检测装置包括X射线源和检测器阵列,两者均安装在可旋转机架上,用于以多个角度依次检测被检查物体的X射线投影 龙门架。 检测器阵列通过连续设置多个由光电二极管阵列和闪烁体阵列层叠在一起构成的检测器元件块而形成。 元件块被布置成与扇形辐射束的中心线不对称,该线的线延伸穿过X射线源的位置和台架的旋转中心。

    Radiation imaging sensor
    90.
    发明授权
    Radiation imaging sensor 失效
    辐射成像传感器

    公开(公告)号:US5059794A

    公开(公告)日:1991-10-22

    申请号:US517382

    申请日:1990-05-01

    摘要: A radiation imaging sensor including laminate structure of a phosphorescent layer, a light-transmissive electrode, a photoconductor layer, an insulating layer and an electrode, an applied voltage to the photoconductor layer through the light-transmissive electrode and the electrode is increased sufficiently so that light emitted from the phosphorescent member causes avalanche multiplicaton of the electrons and/or positive holes generated in the photoconductor layer by field sweep inside the photoconductor layer.

    摘要翻译: 包括磷光层,透光电极,感光体层,绝缘层和电极的层叠结构的放射线摄像传感器,通过透光电极和电极向感光体层施加的电压充分增加,使得 从磷光部件发出的光通过在感光体层内的场扫描引起在感光体层中产生的电子和/或空穴的雪崩乘法。