Takeshi KOISHI, Mai SASAKI, Toshiya NAKAGUCHI, Norimichi TSUMURA and Yoichi MIYAKE
Chiba University
Optical Review Vol.17, No.2, pp.54-60, Mar. 2010
Abstract
We propose a practical and simple measurement function of three dimensional
(3D) length for endoscopy based on triangulation using manually pointed
correspondences. This system is a novel combination of conventional methods.
3D length information is useful for many medical purposes and the burden
of manual procedures can be reduced by focusing on length. We employed
a novel combination for length measurement, that is, a monocular endoscope
with an electromagnetic tracking sensor. The proposed method can measure
the length without any equipment for light projection and changing the
current procedure of endoscopy. Our method is made more robust and reliable
than the automatic correspondence techniques through the best use of the
expertise of endoscopists. We developed a prototype system and evaluated
its accuracy. From experimental results, we showed that the proposed method
can measure the 3D length of static objects accurately as long as the measurement
geometry is suitable.
Full paper ( to appear )
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