知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.029 秒)

    RADIOTHERAPEUTIC SYSTEM AND RADIOTHERAPEUTIC DOSE DISTRIBUTION MEASURING METHOD
    1.
    发明申请
    RADIOTHERAPEUTIC SYSTEM AND RADIOTHERAPEUTIC DOSE DISTRIBUTION MEASURING METHOD 有权
    放射治疗系统和放射治疗剂量分布测量方法

    公开(公告)号：US20090161818A1

    公开(公告)日：2009-06-25

    申请号：US12336919

    申请日：2008-12-17

    申请人： Yasuo Sakurai ,  Shigeharu Ohyu ,  Kyojiro Nambu ,  Motoji Haragashira ,  Masahiro Kumakura ,  Mariko Shibata ,  Katsuhiko Fujimoto ,  Yoichi Takada

    发明人： Yasuo Sakurai ,  Shigeharu Ohyu ,  Kyojiro Nambu ,  Motoji Haragashira ,  Masahiro Kumakura ,  Mariko Shibata ,  Katsuhiko Fujimoto ,  Yoichi Takada

    IPC分类号： A61B6/00 ,  A61N5/10

    CPC分类号： A61N5/1048 ,  A61B6/027 ,  A61B6/4291

    摘要： A detector having a collimator in a position at a specific angle with respect to a therapeutic X-ray beam is mounted to selectively detect only scattering radiation in the direction. To three-dimensionally obtain a distribution of places where scattering occurs in a patient body, a detector is rotated during irradiation and scattering radiation is measured from all of directions. After that, a reconstructing process is performed, and a distribution of occurrence of scattering radiation in the subject is three-dimensionally imaged. Since angles and amounts of X-rays scattered by Compton scattering are known theoretically, if scattering radiation at a certain angle can be detected, the number of scattering radiation at other angles can be also estimated. On the basis of the theory, images of distribution of scattering radiation sources are converted to images of distribution of absorption of radiation.

    摘要翻译： 具有相对于治疗性X射线束在特定角度的准直器的检测器被安装成选择性地仅检测该方向上的散射辐射。 为了三维地获得在患者体内发生散射的位置的分布，在照射期间旋转检测器并且从所有方向测量散射辐射。 之后，进行重建处理，并且对被摄体的散射辐射的发生分布进行三维成像。 由于通过康普顿散射散射的X射线的角度和数量在理论上是已知的，因此如果能够检测到某一角度的散射辐射，则可以估计其他角度的散射辐射的数量。 在理论的基础上，将散射辐射源分布的图像转换为辐射吸收分布的图像。

    Radiotherapeutic system and radiotherapeutic dose distribution measuring method
    2.
    发明授权
    Radiotherapeutic system and radiotherapeutic dose distribution measuring method 有权
    放射治疗系统和放射治疗剂量分布测量方法

    公开(公告)号：US08107589B2

    公开(公告)日：2012-01-31

    申请号：US12336919

    申请日：2008-12-17

    申请人： Yasuo Sakurai ,  Shigeharu Ohyu ,  Kyojiro Nambu ,  Motoji Haragashira ,  Masahiro Kumakura ,  Mariko Shibata ,  Katsuhiko Fujimoto ,  Yoichi Takada

    发明人： Yasuo Sakurai ,  Shigeharu Ohyu ,  Kyojiro Nambu ,  Motoji Haragashira ,  Masahiro Kumakura ,  Mariko Shibata ,  Katsuhiko Fujimoto ,  Yoichi Takada

    IPC分类号： A61N5/10

    CPC分类号： A61N5/1048 ,  A61B6/027 ,  A61B6/4291

    摘要： A detector having a collimator in a position at a specific angle with respect to a therapeutic X-ray beam is mounted to selectively detect only scattering radiation in the direction. To three-dimensionally obtain a distribution of places where scattering occurs in a patient body, a detector is rotated during irradiation and scattering radiation is measured from all of directions. After that, a reconstructing process is performed, and a distribution of occurrence of scattering radiation in the subject is three-dimensionally imaged. Since angles and amounts of X-rays scattered by Compton scattering are known theoretically, if scattering radiation at a certain angle can be detected, the number of scattering radiation at other angles can be also estimated. On the basis of the theory, images of distribution of scattering radiation sources are converted to images of distribution of absorption of radiation.

    摘要翻译： 具有相对于治疗性X射线束在特定角度的准直器的检测器被安装成选择性地仅检测该方向上的散射辐射。 为了三维地获得在患者体内发生散射的位置的分布，在照射期间旋转检测器并且从所有方向测量散射辐射。 之后，进行重建处理，并且对被摄体的散射辐射的发生分布进行三维成像。 由于通过康普顿散射散射的X射线的角度和数量在理论上是已知的，因此如果能够检测到某一角度的散射辐射，则可以估计其他角度的散射辐射的数量。 在理论的基础上，将散射辐射源分布的图像转换为辐射吸收分布的图像。

    Magnetic particle imaging apparatus, method of disposing detection coil for magnetic particle imaging apparatus, and magnetic flux detecting apparatus
    5.
    发明授权
    Magnetic particle imaging apparatus, method of disposing detection coil for magnetic particle imaging apparatus, and magnetic flux detecting apparatus 有权
    磁粉成像装置，磁性粒子成像装置的检测线圈的配置方法以及磁通检测装置

    公开(公告)号：US08350566B2

    公开(公告)日：2013-01-08

    申请号：US12138132

    申请日：2008-06-12

    申请人： Shigeharu Ohyu ,  Motoji Haragashira ,  Yasuo Sakurai

    发明人： Shigeharu Ohyu ,  Motoji Haragashira ,  Yasuo Sakurai

    IPC分类号： G01V3/00

    CPC分类号： A61B5/05 ,  A61B5/0515

    摘要： In a magnetic particle imaging apparatus that forms an image of a distribution of magnetic particles based on changes in a magnetic flux generated by magnetization of the magnetic particles, modulation coils that magnetize magnetic particles present in a field free area by applying a modulation magnetic field to the field free area, and detection coils are disposed such as to suppress an influence caused by a magnetic flux of the modulation magnetic field applied by the modulation coils and included in a detected magnetic flux.

    摘要翻译： 在基于由磁性粒子的磁化产生的磁通量的变化形成磁性粒子分布的图像的磁性粒子成像装置中，通过向磁场分布施加调制磁场来磁化存在于无场区域的磁性粒子的调制线圈 无场区域和检测线圈被设置为抑制由调制线圈施加的调制磁场的磁通量引起的并且包含在检测的磁通量中的影响。

    Nuclear magnetic resonance transmitter and receiver system
    8.
    发明授权
    Nuclear magnetic resonance transmitter and receiver system 失效
    核磁共振发射和接收系统

    公开(公告)号：US4691164A

    公开(公告)日：1987-09-01

    申请号：US901737

    申请日：1986-08-29

    申请人： Motoji Haragashira

    发明人： Motoji Haragashira

    IPC分类号： H03H5/02 ,  G01R33/20 ,  G01R33/36

    CPC分类号： G01R33/3621 ,  G01R33/3628

    摘要： A tuning circuit for an NMR transmitter and receiver system includes a variable and fixed capacitor connected to a pick-up coil. Matching of the pick-up coil to a preamplifier is associated with matching to available cable impedance. As a consequence of the impedance matching, the resonance tuning is carried out by adjustment of the variable capacitor. In utilizing the tuning circuit, a high Q of pick-up coil is obtained and the detected NMR signal is optimally transferred to the preamplifier while the length of the cable connecting the coil with the preamplifier is not limited.

    摘要翻译： 用于NMR发射器和接收器系统的调谐电路包括连接到拾取线圈的可变和固定电容器。 拾取线圈与前置放大器的匹配与匹配可用的电缆阻抗相关联。 作为阻抗匹配的结果，通过调节可变电容器来进行谐振调谐。 在利用调谐电路的同时，获得高Q的拾波线圈，并且将检测到的NMR信号最佳地传送到前置放大器，而将线圈与前置放大器连接的电缆的长度不受限制。

    Magnetic resonance imaging system
    9.
    发明授权
    Magnetic resonance imaging system 失效
    磁共振成像系统

    公开(公告)号：US5235281A

    公开(公告)日：1993-08-10

    申请号：US720919

    申请日：1991-06-25

    申请人： Motoji Haragashira ,  Yoshiyuki Usui

    发明人： Motoji Haragashira ,  Yoshiyuki Usui

    IPC分类号： G01R33/20 ,  A61B5/055 ,  G01R33/385

    CPC分类号： G01R33/3852

    摘要： In an magnetic resonance imaging system of the echo planar imaging method, a gradient field Gx is generated by a linear type transconductance amplifier and gradient fields Gy and Gz are generated by an amplifier which is formed of a resonant type amplifier or a current type inverter for outputting a first current of a given waveform, a linear type transconductance amplifier for outputting a second current of an arbitrary waveform at a lower level than that of the first current, a gradient field coil having first and second windings for respectively running the first and second currents, the first and second windings being wound in a bifilar form, and a cancel coil for canceling a voltage induced by the gradient field coil, the cancel coil having third and fourth windings for respectively connected between the first winding and the resonant type amplifier or a current type inverter and between the second winding and the linear type transconductance amplifier, the third and fourth windings being wound in a bifilar form.

    摘要翻译： 在回波平面成像方法的磁共振成像系统中，通过线性跨导放大器生成梯度场Gx，并且由谐振型放大器或电流型逆变器形成的放大器产生梯度场Gy和Gz， 输出给定波形的第一电流;线性型跨导放大器，用于以比所述第一电流低的电平输出任意波形的第二电流;梯度磁场线圈，具有用于分别运行所述第一和第二绕组的第一和第二绕组 电流，第一绕组和第二绕组以双向形式缠绕;以及消除线圈，用于消除由梯度磁场线圈感应的电压，该消除线圈具有用于分别连接在第一绕组和谐振型放大器之间的第三和第四绕组， 第二绕组和线性跨导放大器之间的电流型反相器，第三和第四绕组 gs以双面形式伤口。

    RF magnetic shield for MRI
    10.
    发明授权
    RF magnetic shield for MRI 失效
    射频磁屏蔽MRI

    公开(公告)号：US5396173A

    公开(公告)日：1995-03-07

    申请号：US45979

    申请日：1993-04-09

    申请人： Yoshitomo Sakakura ,  Motoji Haragashira ,  Toru Segawa

    发明人： Yoshitomo Sakakura ,  Motoji Haragashira ,  Toru Segawa

    IPC分类号： A61B5/055 ,  G01R33/421 ,  G01R33/422 ,  G01R33/28

    CPC分类号： G01R33/422 ,  H01G2/22

    摘要： Disclosed is an RF magnetic shield for magnetic resonance imaging apparatus having a gradient coil and an RF coil allocated in a generally cylindrical magnet of the apparatus. The RF magnetic shield comprises conductive shielding plate members, disposed between the gradient coil and the RF coil, through which long slits are formed, and capacitors connected to both the longitudinal ends of the slits, respectively. Each of the capacitors consists of a multilayer capacitor, which is a larger capacitance and is continuously and electrically connected to both the longitudinal ends of the respective slits.

    摘要翻译： 公开了一种用于磁共振成像设备的RF磁屏蔽，其具有分配在该设备的大致圆柱形磁体中的梯度线圈和RF线圈。 RF磁屏蔽包括设置在梯形线圈和RF线圈之间的导电屏蔽板构件，通过该RF线圈形成长缝隙，以及电容器分别连接到狭缝的纵向两端。 每个电容器由多层电容器组成，其是较大的电容，并且连续地和电连接到相应狭缝的纵向两端。