Article
Experimental setting for measurement and correction of optical distortion of rigid endoscopic systems
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Published: | March 30, 2016 |
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Outline
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Aim: The endoscope armamentarium is a huge part of modern medicine. However, despite their wide applications, endoscopes are not without setbacks, the major one being image distortion caused by the nature of the lenses comprising the system. The aim of the current study is to present a methodology for recording and measuring the optical distortion of several clinically used endoscopes.
Materials and methods: A scaffold consisting of a vertical calibration grid two supports and fixating mechanisms was constructed for the aim of the study. Different rigid systems, used in a wide range of medical fields, were aimed at the calibration grid at the respected working angle and images were obtained with an endoscope compatible digital camera. The distortion of the images was later measured and corrected with an established post-procedural correction algorithm to visualize the difference.
Results: Comparison between the distortion of the different systems showed the rate at which endoscopists have to be accustomed to their systems, while also demonstrating the ease of image correction. The data also provided the basis for further detailed research on how the distortion rate affects the learning process and practice of the endoscopist not only in otorhinolaryngology, but in other medical fields such as abdominal surgery and orthopedics.
Conclusion: The natural optical distortion of any endoscope can be easily recorded and measured with our device, provided the constant conditions. The post-process corrections could at some point be programed into the imaging systems and provide an undistorted live feed endoscopy image.
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