Laser distance measurement using a newly developed composite-type optical fiberscope for fetoscopic laser surgery

Seki, Takahiro; Oka, Kiyoshi; Naganawa, Akihiro; Yamashita, Hiromasa; Kim, Keri; Chiba, Tadatoshi

doi:10.1016/j.optlaseng.2010.05.010

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…The same orientation of the endoscope and the laser fiber allows surgeons to intuitively aim at the target, even from a two-dimensional endoscopic view [8][9][10][11], and laser cauterization performance is only 5% lower than that of standard laser devices.…”

Section: Resultsmentioning

confidence: 99%

A novel ultrasmall composite optical fiberscope

et al. 2011

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Section: Resultsmentioning

confidence: 99%

A novel ultrasmall composite optical fiberscope

et al. 2011

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“…To measure the distance between the target and the tool, we could integrate our FC system with a laser-based distance sensor such as the one proposed in [23], which was developed for fetoscopic laser surgery. This however would increase the size of the tool, since it would be necessary to use a beam splitter for separating the measurement laser from the ablation laser.…”

Section: B Integration With Endoscopic Toolmentioning

confidence: 99%

A Focus Control System Based on Varifocal Mirror for CO₂ Fiber-Coupled Laser Surgery

Geraldes

Fiorini

Mattos

2021

IEEE Trans. Med. Robot. Bionics

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“…Several publications refer to the 3D reconstruction of hollow parts using rigid endoscopes, primarily in the medical field [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. However, works reporting the use of rigid or flexible endoscopes in industry is limited to a few publications [1,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

3D reconstruction of hollow parts analyzing images acquired by a fiberscope

Icasio-Hernández

González-Barbosa

Hurtado-Ramos

et al. 2014

Meas. Sci. Technol.

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A modified fiberscope used to reconstruct difficult-to-reach inner structures is presented. By substituting the fiberscope’s original illumination system, we can project a profile-revealing light line inside the object of study. The light line is obtained using a sandwiched power light-emitting diode (LED) attached to an extension arm on the tip of the fiberscope. Profile images from the interior of the object are then captured by a camera attached to the fiberscope’s eyepiece. Using a series of those images at different positions, the system is capable of generating a 3D reconstruction of the object with submillimeter accuracy. Also proposed is the use of a combination of known filters to remove the honeycomb structures produced by the fiberscope and the use of ring gages to obtain the extrinsic parameters of the camera attached to the fiberscope and the metrological traceability of the system. Several standard ring diameter measurements were compared against their certified values to improve the accuracy of the system. To exemplify an application, a 3D reconstruction of the interior of a refrigerator duct was conducted. This reconstruction includes accuracy assessment by comparing the measurements of the system to a coordinate measuring machine. The system, as described, is capable of 3D reconstruction of the interior of objects with uniform and non-uniform profiles from 10 to 60 mm in transversal dimensions and a depth of 1000 mm if the material of the walls of the object is translucent and allows the detection of the power LED light from the exterior through the wall. If this is not possible, we propose the use of a magnetic scale which reduces the working depth to 170 mm. The assessed accuracy is around ±0.15 mm in 2D cross-section reconstructions and ±1.3 mm in 1D position using a magnetic scale, and ±0.5 mm using a CCD camera.

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Laser distance measurement using a newly developed composite-type optical fiberscope for fetoscopic laser surgery

Cited by 9 publications

References 11 publications

A novel ultrasmall composite optical fiberscope

A novel ultrasmall composite optical fiberscope

A Focus Control System Based on Varifocal Mirror for CO₂ Fiber-Coupled Laser Surgery

3D reconstruction of hollow parts analyzing images acquired by a fiberscope

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Laser distance measurement using a newly developed composite-type optical fiberscope for fetoscopic laser surgery

Cited by 9 publications

References 11 publications

A novel ultrasmall composite optical fiberscope

A novel ultrasmall composite optical fiberscope

A Focus Control System Based on Varifocal Mirror for CO2 Fiber-Coupled Laser Surgery

3D reconstruction of hollow parts analyzing images acquired by a fiberscope

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A Focus Control System Based on Varifocal Mirror for CO₂ Fiber-Coupled Laser Surgery