Measuring with endoscopes

Endoscopy has been widely applied for visual inspection in difficult to access environments. In the medical field, endoscopy is not only the method of diagnosis but also the method of treatment. In regular endoscopy there are some fundamental limitations that can affect the proper diagnosis or treatment. When a three-dimensional object is imaged by means of an endoscope, only a two-dimensional display is possible. So, the endoscopic image does not provide any quantitative information about the size of objects. In modern diagnostics, however, it can be necessary to know the size and the shape of objects or to perform some deformation analysis. The optical methods for reconstructing the 3-D object shape from a 2-D endoscopic image are described and illustrated with some examples.

[1]  Takashi Tsumanuma,et al.  Ultrathin fiberscope for stereoscopic vision , 1993, Photonics West - Lasers and Applications in Science and Engineering.

[2]  Rimas Juskaitis,et al.  Endoscope with optical sectioning capability , 1994, Other Conferences.

[3]  Richard I. Kitney,et al.  3-D visualization of arterial structures: tissue differentiation techniques , 1990, Photonics West - Lasers and Applications in Science and Engineering.

[4]  Hsin-Chu Liu,et al.  Optical three-dimensional sensing by phase measuring profilometry , 1989 .

[5]  Hans I. Bjelkhagen.  What is possible with holographic endoscopy? (Invited Paper) , 1992, Photonics West - Lasers and Applications in Science and Engineering.

[6]  Halina Podbielska.  Endoscopic measurements by holographic and nonholographic optical methods , 1993, Photonics West - Lasers and Applications in Science and Engineering.

[7]  M Epstein,et al.  In vivo holography of vocal cords , 1982, Journal of surgical oncology.

[8]  Halina Podbielska,et al.  Endoscopic optical metrology: the possibilities of holographic interferometry , 1990, Photonics West - Lasers and Applications in Science and Engineering.

[9]  M. Takeda,et al.  Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry , 1982 .

[10]  J. Gilbert,et al.  Holographic displacement analysis with multimode-fiber optics , 1981 .

[11]  P. Smigielski,et al.  Real-time holographic endoscopy , 1992, Photonics West - Lasers and Applications in Science and Engineering.

[12]  M. Takeda,et al.  Fourier transform profilometry for the automatic measurement of 3-D object shapes. , 1983, Applied optics.

[13]  Manuel Dujovny,et al.  Three-dimensional image-guided stereotactic resection of intracranial lesions , 1990, Photonics West - Lasers and Applications in Science and Engineering.

[14]  Jumpei Tsujiuchi,et al.  Multiplex holograms of a skull made of CT images , 1987 .

[15]  S. Toyooka,et al.  Automatic profilometry of 3-D diffuse objects by spatial phase detection. , 1986, Applied optics.