Höller KE, Schneider A, Jahn J, Gutierrez J, Wittenberg T, Meining A, Von Delius S, Hornegger J, Feussner H (2010)
Publication Type: Journal article, Original article
Publication year: 2010
Original Authors: Höller K., Schneider A., Jahn J., Gutierrez J., Wittenberg T., Meining A., Von Delius S., Hornegger J., Feußner H.
Publisher: Walter de Gruyter
Book Volume: 55
Pages Range: 211-217
Journal Issue: 4
DOI: 10.1515/BMT.2010.032
A known problem in endoscopic surgery (especially with flexible video endoscopes) is the absence of a stable horizon in endoscopic images displayed on a monitor. With our "ENDOrientation" approach, image rectification, even in non-rigid endoscopic surgery (particularly NOTES), can be realized with a tiny MEMS tri-axial inertial sensor placed on the tip of an endoscope. This sensor measures the impact of gravity on each of the three orthogonal accelerometer axes in real time. After an initial calibration and temporal filtering of these three data steams, the rotation angle of an endoscope can be estimated directly. The achievable sampling rate of the inertial sensor is above the usual endoscopic video frame rate of 25 Hz; the rotation accuracy is approximately one degree. The image rectification can be performed in real time by digitally rotating the endoscopic video signal. Improvements and benefits have been evaluated in animal studies: coordination and movement of different instruments was rated to be much more intuitive with a stable horizon on endoscopic images. The recorded time stamps and position tracks clearly support this observation. © 2010 by Walter de Gruyter.
APA:
Höller, K.E., Schneider, A., Jahn, J., Gutierrez, J., Wittenberg, T., Meining, A.,... Feussner, H. (2010). Orientation of endoscopic images: Rectification by gravity. Biomedizinische Technik, 55(4), 211-217. https://doi.org/10.1515/BMT.2010.032
MLA:
Höller, Kurt Emmerich, et al. "Orientation of endoscopic images: Rectification by gravity." Biomedizinische Technik 55.4 (2010): 211-217.
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