A new, safer, controllable field-of-view endoscope avoiding movement inside body cavities

Kim, Keri; Kamiuchi, Hiroki; Masamune, Ken; Dohi, Takeyoshi

doi:10.1016/j.medengphy.2010.09.015

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…Scanning fibers have been shown to have high-resolution in catheterscopes [8,9]. Polarization-based methods multiplex light based on its vector nature [10,11]. Many commercial devices exist [12][13][14].…”

Section: Related Workmentioning

confidence: 99%

Spectral encoding enhances visual flexibility of surgical endoscopes

et al. 2014

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Endoscope cameras play an important and growing role as a diagnostic and surgical tool. The endoscope camera is usually used to provide a view of the scene straight ahead of the instrument to the operator. As is common in many remotely operated systems, the limited field of view and the inability to pan the camera make it challenging to gain a situational awareness comparable to an operator with direct access to the scene. We present a spectral multiplexing technique for endoscopes that allows for overlay of the existing forward view with additional views at different angles to increase the effective field of view of the device. Our goal is to provide peripheral vision while minimally affecting the design and forward image quality of existing systems.

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Section: Related Workmentioning

confidence: 99%

Spectral encoding enhances visual flexibility of surgical endoscopes

et al. 2014

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A beam-splitter-type 3-D endoscope for front view and front-diagonal view images

et al. 2012

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A three-dimensional deformable liquid lens array for directional and wide angle laparoscopic imaging

Kang

Zhao

2013

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS)

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Figure 1: Working principle of the 3D deformable liquid lens array: (a) comparison of human camera eye and insect compound eye, (b) perspective view showing the bi-layered microfluidics and the liquid lenses, and (c) cross-sectional view showing small membranes that seal the liquid lenses, a large membrane that underlies the top microfluidic network, and optical medium (indicated by green) beneath small membranes and the large membrane. ABSTRACTMost of currently employed laparoscopes use a single and non-tunable solid lens to visualize the surgical environment during minimal invasive interventions. These devices are limited due to the loss of depth perception, fixed view direction and narrow field-of-view (FOV). In this study, a three-dimensional deformable liquid lens array with adaptive focusing and directional view capability is developed. Miniature liquid lenses sealed by deformable membranes are arranged on a flexible substrate. During the operation, the flexible substrate where the liquid lenses reside is driven by hydraulic pressure and bulges into different curvatures, which results in the maximal angular difference of the optical axes of individual lenses in the array from 0 o to 45 o . The focal length of each lens can be simultaneously tuned from 64.3mm to 2.1mm. At the directional view of 45 o and focal length of 2.1mm, the overall FOV exceeds 150 o . This work promises the potential of directional and wide angle laparoscopic imaging where space constraint is a concern.

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A new, safer, controllable field-of-view endoscope avoiding movement inside body cavities

Cited by 4 publications

References 9 publications

Spectral encoding enhances visual flexibility of surgical endoscopes

Spectral encoding enhances visual flexibility of surgical endoscopes

A beam-splitter-type 3-D endoscope for front view and front-diagonal view images

A three-dimensional deformable liquid lens array for directional and wide angle laparoscopic imaging

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