New laser ruler instrument for making measurements through an endoscope.
New laser ruler instrument for making measurements through an endoscope.
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用于通过内窥镜进行测量的新型激光尺仪器。
DOI：
10.1016/s0194-59989770251-1
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Zealear,DL
中科院分区：
文献类型：
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作者：
Herzon,GD;Zealear,DL
引入内窥镜检查体腔，提高了临床诊断的准确性。内窥镜提供了内部表面形貌的放大图像。然而，放大率随着瞄准镜与物体之间距离的变化而变化。放大倍率的变化使得不可能测量表面距离，以确定病变的分期或结构的位移。在某些情况下，可以在焦平面上放置标尺，以提供通过内窥镜测量的参考比例尺。在其他情况下，由于放大系数由焦距决定，因此测量了范围到物体的距离。1,2距离可以通过在瞄准镜的末端向物体投射尺子来测量，然后为内窥镜目镜上的分割线提供校准的指标。然后，该标尺可用于测量视场中的轮廓。Nasri等人描述的另一种方法涉及声带的视频图像分析。利用这种技术，摄像机平行于声带移动一段已知的距离，视频图像的平移程度以像素为单位进行记录，以提供表面尺寸的索引。不幸的是，这些缩放内窥镜图像的方法在大多数临床应用中并不实用。我们设计并制造了一种新设备
The introduction of the endoscope for inspection of body cavities has improved the accuracy of clinical diagnosis. The endoscope provides a magnified image of internal surface topography. However, the magnification changes as the distance between the scope and object is varied. Changes in magnification make it impossible to measure surface distances for staging of lesions or determination of the displacement of structures. In some instances, it has been possible to position a ruler in the focal plane to provide a reference scale for measurement through an endoscope. In other instances, the scope-to-object distance has been measured because the magnification factor is determined by focal length. 1, 2 The distance can be measured by projection of a ruler beyond the end of the scope to the object, which then provides an index for calibration of a reticule on the endoscope eyepiece. The reticule can then be used to measure profiles in the field of view. Another method described by Nasri et al. 3 involves videoimage analysis of the vocal fold. With this technique, a videocamera is moved a known distance parallel to the vocal fold, and the extent of translation of a videoimage is noted in pixels to provide an index of surface dimension. Unfortunately, these methods of scaling an endoscope image are not practical in most clinical applications. We have designed and constructed a new device