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首页> 外文会议>Diagnostic and Therapeutic Cardiovascular Interventions IV >Laser autodyne angioscopy
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Laser autodyne angioscopy

机译：激光自我修复星座

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Abstract: A novel approach to imagination of inner surface of arteria during performing laser and balloon angioplasty is suggested. To this end the laser light was transmitted via fiber to the zone of interest and radiation diffused by the walls of the vessel was adopted by receiver. Known technique to determine of contours of an object by measuring the time of the laser pulse propagation is unusable due to the small geometrical scales. Using the CW laser and feeding a portion of the backscattered signal power into the laser cavity (this kind of device was referred to as laser autodyne coherent receiver), the authors have been able to measure the object contour with spatial resolution of up to 2 microns. Such resolution and high sensitivity inherent to this technique should allows one to detect early in the development of the atherosclerosis. To obtain the 3D image of the vessel inside surface we offer two methods. In the first case the vessel side is scanned by moving the end of light quid. In the second one multimode laser is used and the image is drawing by scanning the transverse modes of this laser. The vessel side and atherosclerotic plaques have the different reflectivity spectrum and this fact can be used to increase the image contrast. The correct selection of the laser wavelength makes possible to work into the vessel with circulation of the blood. The calculation of laser autodyne intrascope performance and tentative experimental results are presented in this report. The advantages of this method for the angiography are in speed and adequately of control during performing angioplasty. !5
机译：摘要：提出了一种在进行激光和球囊血管成形术时想象动脉内表面的新颖方法。为此，激光通过光纤传输到感兴趣的区域，并且接收器采用了通过容器壁扩散的辐射。由于几何尺寸小，因此无法通过测量激光脉冲传播的时间来确定物体轮廓的已知技术。使用连续波激光器并将部分反向散射的信号功率馈入激光腔（这种设备称为激光自达因相干接收器），作者能够以高达2微米的空间分辨率测量物体轮廓。这种技术固有的分辨率和高灵敏度应使人们能够在动脉粥样硬化的发展早期发现。为了获得血管内表面的3D图像，我们提供了两种方法。在第一种情况下，通过移动光管末端来扫描血管侧。在第二个中，使用多模激光器，并且通过扫描该激光器的横向模来绘制图像。血管侧和动脉粥样硬化斑块具有不同的反射光谱，这一事实可用于增加图像对比度。正确选择激光波长可以使血液循环进入血管。本报告介绍了激光自达因内窥镜性能的计算和初步实验结果。这种用于血管造影的方法的优点是在进行血管成形术时速度快且可适当控制。 ！5

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