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    • 73. 发明申请
    • IMPLANTABLE MEDICAL DEVICE HAVING OPTICAL FIBER FOR SENSING ELECTRICAL ACTIVITY
    • 具有用于传感电活动的光纤的可植入医疗装置
    • US20080200769A1
    • 2008-08-21
    • US11676128
    • 2007-02-16
    • VINOD SHARMAXiaohong Zhou
    • VINOD SHARMAXiaohong Zhou
    • A61N5/06
    • A61B5/0071A61B5/0084A61B5/0452
    • An implantable medical device for optically sensing action potential signals in excitable body tissue. The device includes an elongated tubular lead body carrying an optical fiber extending from a proximal lead end to a distal lead end to position the optical fiber at a target site. The lead body additionally carries a conduit for dispensing a voltage-sensitive fluorescent dye into tissue surrounding the target site. The optical fiber transmits excitation light to the fluorescent dye to cause the dye to fluoresce with varying intensity as the transmembrane potentials of local tissue cells vary due to passing depolarization wavefronts. The optical fiber transmits the fluorescence signal to the device to generate an action potential signal or fiducial points of an action potential signal for use in accurately measuring and characterizing electrical activity of excitable tissue.
    • 一种用于在可兴奋的身体组织中光学感测动作电位信号的可植入医疗装置。 该装置包括细长的管状引线体,其承载从近侧引线端延伸到远端引线端的光纤,以将光纤定位在目标部位。 引线体还带有用于将电压敏感的荧光染料分配到靶区域周围的组织中的导管。 光纤将激发光透射到荧光染料,以使得染料以不同的强度发荧光,因为局部组织细胞的跨膜电位由于通过去极化波前而变化。 光纤将荧光信号传输到设备以产生动作电位信号或动作电位信号的基准点,用于精确测量和表征可兴奋组织的电活动。
    • 79. 发明授权
    • Method for acquiring spatially and spectrally selective MR images
    • 用于获取空间和频谱选择性MR图像的方法
    • US06175236B1
    • 2001-01-16
    • US09047822
    • 1998-03-25
    • Xiaohong ZhouMatthew A. Bernstein
    • Xiaohong ZhouMatthew A. Bernstein
    • G01V300
    • G01R33/446G01R33/5613
    • A method for acquiring spatially and spectrally selective MR images by means of an MR imaging system includes the step of selecting an SPSP pulse sequence, comprising a succession of RF sub-pulses and an oscillatory gradient magnetic field, which is disposed to select a slice through a subject. The method further includes measuring specified parameters of a perturbation magnetic field associated with the imaging system, and deriving an expression for the perturbation field from respective measured parameters and from the oscillatory gradient magnetic field. A specified ideal frequency modulation function, associated with the SPSP sequence, is disposed to offset the slice to a particular spatially localized region of the subject. The SPSP pulse sequence is modified by adjusting the frequency modulation function in specified corresponding relationship with the expression. The modified SPSP pulse sequence is then applied to the subject to excite a selected spectral species in the spatially localized region, while substantially reducing signal intensity loss resulting from the perturbation magnetic field.
    • 用于通过MR成像系统获取空间和频谱选择性MR图像的方法包括选择包括一系列RF子脉冲和振荡梯度磁场的SPSP脉冲序列的步骤,其被设置为选择切片通过 课程。 该方法还包括测量与成像系统相关联的扰动磁场的指定参数,以及从相应的测量参数和振荡梯度磁场导出扰动场的表达式。 设置与SPSP序列相关联的指定的理想频率调制功能,以将切片偏移到对象的特定空间局部区域。 通过调整与规定的对应关系的频率调制函数来修改SPSP脉冲序列。 然后将经修改的SPSP脉冲序列应用于受试者以激发空间局部区域中的选定光谱物种,同时显着降低由扰动磁场引起的信号强度损失。