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    • 5. 发明申请
    • HIGH SPATIAL RESOLUTION OPTICAL COHERENCE TOMOGRAPHY ROTATION CATHETER
    • 高空间分辨率光学相干旋转导管
    • WO2013012841A1
    • 2013-01-24
    • PCT/US2012/047017
    • 2012-07-17
    • ST. JUDE MEDICAL, INC.LIU, YuLIU, Jiayin
    • LIU, YuLIU, Jiayin
    • A61B6/00
    • A61B5/0084A61B1/00167A61B5/0066A61B5/6852Y10T29/49826
    • An optical coherence tomography rotation catheter comprises a catheter body (40) and a tubular member (10) that rotates around a longitudinal axis in the catheter body. An optical fiber (20) extends along an interior of the tubular member and has an optical fiber distal end. A light reflecting member (22) is distal of the optical fiber distal end and rotates around the longitudinal axis with the tubular member. The light reflecting member includes a light reflecting surface which is spaced from and faces the optical fiber distal end and which is inclined to reflect the light from the optical fiber in a radial direction at an angle with respect to the longitudinal axis. The light reflecting member has a diameter of at most about 0.25 mm. The light reflecting surface is polished and coated with a light reflecting film.
    • 光学相干断层摄影旋转导管包括导管主体(40)和围绕导管主体中的纵向轴线旋转的管状构件(10)。 光纤(20)沿着管状部件的内部延伸并且具有光纤远端。 光反射构件(22)在光纤远端的远侧并且与管状构件围绕纵向轴线旋转。 光反射构件包括光反射表面,该光反射表面与光纤远端隔开并面对光纤远端,并且倾斜以相对于纵向轴线以一定角度沿径向反射来自光纤的光。 光反射部件的直径至多为大约0.25mm。 光反射表面被抛光并涂覆有光反射膜。
    • 7. 发明申请
    • MULTI-CHANNEL OPTICAL COHERENCE TOMOGRAPHY FOR IMAGING AND TEMPERATURE AND FORCE SENSING
    • 用于成像和温度和力感测的多通道光学相干坐标
    • WO2012122000A1
    • 2012-09-13
    • PCT/US2012/027393
    • 2012-03-02
    • ST. JUDE MEDICAL, INC.LIU, Yu
    • LIU, Yu
    • A61B5/00
    • A61B5/0066G01L3/101
    • Embodiments of the invention provide multi-channel OCT (Optical Coherence Tomography) for imaging biological tissue or the like, and for temperature and/or force sensing, preferably in real time. In one embodiment, an optical signal processing system (200) comprises: a processor (202); a memory (204); a receiving module (210) to receive in real time input from multiple channels of OCT producing interfering optical signals representing multiple measured distances for a target imaging object; a Fast Fourier Transform (FFT) module (212) to apply FFT on the interfering optical signals in real time to produce Fourier frequencies corresponding to the multiple measured distances; and a calculation module (214) to calculate in real time multiple force components of a force applied on the target imaging object to cause at least some of the multiple measured distances for the target imaging object based on the Fourier frequencies from the FFT module.
    • 本发明的实施例提供用于成像生物组织等的多通道OCT(光学相干断层扫描),以及优选实时的温度和/或力感测。 在一个实施例中,光信号处理系统(200)包括:处理器(202); 存储器(204); 接收模块(210),用于从OCT的多个通道实时输入,产生表示用于目标成像对象的多个测量距离的干涉光信号; 快速傅立叶变换(FFT)模块(212),用于实时地对干扰光信号应用FFT,以产生对应于多个测量距离的傅立叶频率; 以及计算模块(214),用于实时地计算施加在所述目标成像对象上的力的多个力分量,以基于来自所述FFT模块的傅里叶频率来引起所述目标成像对象的所述多个测量距离中的至少一些距离。
    • 8. 发明申请
    • LOW COST HIGH EFFICIENCY SIGNAL INTERROGATION FOR MULTI-CHANNEL OPTICAL COHERENCE TOMOGRAPHY
    • 低通道高效信号多通道光学相干测量
    • WO2012121999A2
    • 2012-09-13
    • PCT/US2012/027392
    • 2012-03-02
    • ST. JUDE MEDICAL, INC.LIU, Yu
    • LIU, Yu
    • A61B5/00
    • A61B5/0066G01B9/02004G01B9/02027G01B9/0205G01B9/02057G01B9/02069G01B9/02091G01B2290/45
    • A signal interrogation system comprises an optical coupler (22) to split input laser beam into a first laser beam as a power reference and a second laser beam, the optical coupler being coupled to a first path (24) for the first laser beam and a second path (25) for the second laser beam; an optical circulator (28) disposed in the second path; a bi-directional optical switch (30) disposed in the second path and having on one side a single channel end oriented toward the optical circulator and on another side multiple channel ends with multiple switchable channels; a plurality of optical fibers (34) coupled to the multiple channel ends of the bi-directional optical switch; an interference optical signals path (44) coupled to the optical circulator to receive the interference optical signals from the bi-directional switch; and a balanced photo detector (50) to measure a power difference between the interference optical signals and the power reference.
    • 信号询问系统包括将输入激光束分成第一激光束作为功率基准的光耦合器(22)和第二激光束,所述光耦合器耦合到第一激光束的第一路径(24)和 用于第二激光束的第二路径(25) 设置在所述第二路径中的光循环器(28) 设置在第二路径中的双向光开关(30),并且在一侧具有朝向光循环器定向的单通道端,并且在另一侧上多个通道以多个可切换通道结束; 耦合到双向光开关的多通道端的多个光纤(34); 耦合到所述光环行器的干涉光信号路径(44),以接收来自所述双向开关的干涉光信号; 以及平衡光电检测器(50),用于测量干涉光信号和功率基准之间的功率差。