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    • 9. 发明申请
    • SYSTEMS AND METHODS FOR MINIMALLY-INVASIVE OPTICAL-ACOUSTIC IMAGING
    • 用于最小入射光学声像成像的系统和方法
    • US20070133925A1
    • 2007-06-14
    • US11674568
    • 2007-02-13
    • Kenneth BatesGil Vardi
    • Kenneth BatesGil Vardi
    • G02B6/38
    • A61B5/0095A61B1/00117A61B1/00165A61B5/0097A61B5/02007A61B5/6851A61B5/6876A61B5/742A61B8/0833A61B8/12G01H9/004G01N29/24G02B6/10
    • This document discusses, among other things, an imaging guidewire that includes one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imaging energy. Returned ultrasound is sensed by an FBG sensor. A responsive signal is optically communicated to the proximal end of the guidewire, and processed to develop a 2D or 3D image. In one example, the guidewire outer diameter is small enough such that an intravascular catheter can be passed over the guidewire. Techniques for improving ultrasound reception include using a high compliance material, resonating the ultrasound sensing transducer, using an attenuation-reducing coating and/or thickness, and/or using optical wavelength discrimination. Techniques for improving the ultrasound generating transducer include using a blazed FBG, designing the photoacoustic material thickness to enhance optical absorption. Techniques for distinguishing plaque or vulnerable plaque may be used to enhance the displayed image.
    • 本文件尤其涉及一种成像导丝,其包括沿导丝传送光的一个或多个光纤。 在其远端处或附近,一个或多个闪耀或其它光纤布拉格光栅(FBG)将光引导到提供超声成像能量的光声换能器材料。 返回的超声波由FBG传感器感测。 响应信号被光学地传递到导丝的近端,并被处理以形成2D或3D图像。 在一个示例中,导丝外径足够小,使得血管内导管可以穿过导​​丝。 用于改善超声波接收的技术包括使用高柔顺性材料,使用衰减减小涂层和/或厚度谐振超声波感测传感器和/或使用光波长鉴别。 用于改进超声波产生换能器的技术包括使用闪耀的FBG,设计光声材料厚度以增强光学吸收。 用于区分斑块或易损斑块的技术可用于增强显示图像。