A novel ultralow-illumination endoscope system

Kim, Keri; Kubota, Minoru; Ohkawa, Yuji; Shiraishi, Takashi; Kawai, Teruo; Kobayashi, Akira; Yamashita, Hiromasa; Chiba, Tadatoshi

doi:10.1007/s00464-010-1498-8

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Limitations in the quality of the endoscopic images acquired in the cloudy amniotic medium can also be address when the method is complemented with imaging enhancement technologies for fetoscopic imaging. Some examples include the use of fluorescence endoscope [40,41], ultra-high sensitive endoscopic camera [42], and a developing technique for hyperspectral imaging of the placental vasculature [43].…”

Section: Limitations and Future Improvementmentioning

confidence: 99%

Vision-based endoscope tracking for 3D ultrasound image-guided surgical navigation

Yang

Wang

Ando

et al. 2015

Computerized Medical Imaging and Graphics

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Section: Limitations and Future Improvementmentioning

confidence: 99%

Vision-based endoscope tracking for 3D ultrasound image-guided surgical navigation

Yang

Wang

Ando

et al. 2015

Computerized Medical Imaging and Graphics

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“…The heat generated may considerably raise the thermal noise of the CMOS sensor next to it. Additionally, the spatial coherence of the LED's emission would prevent its effective coupling through a single fiber [10,12]. As a viable alternative, we have demonstrated the miniaturized combination of supercontinuum with various CMOS image sensors (with die as small as 0.7mm x 0.7mm in size) [4, 15,29].…”

Section: Resultsmentioning

confidence: 99%

“…Fiber bundle coupling or packaged LED chips in the distal end, usually of a few millimeters square in size, would be too large for such a purpose. Additionally, direct packaging may present the issue of thermal management [10,11]. Thus, engineering a very compact light source with high brightness while free of thermal loading is imperative for miniaturized endoscopy.…”

Section: Introductionmentioning

confidence: 99%

Supercontinuum as a light source for miniaturized endoscopes

Lu¹,

Lin²,

Hsieh³

et al. 2016

Biomed. Opt. Express

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Abstract:In this work, we have successfully implemented supercontinuum based illumination through single fiber coupling. The integration of a single fiber illumination with a miniature CMOS sensor forms a very slim and powerful camera module for endoscopic imaging. A set of tests and in vivo animal experiments are conducted accordingly to characterize the corresponding illuminance, spectral profile, intensity distribution, and image quality. The key illumination parameters of the supercontinuum, including color rendering index (CRI: 72%~97%) and correlated color temperature (CCT: 3,100K~5,200K), are modified with external filters and compared with those from a LED light source (CRI~76% & CCT~6,500K). The very high spatial coherence of the supercontinuum allows high luminosity conduction through a single multimode fiber (core size~400μm), whose distal end tip is attached with a diffussion tip to broaden the solid angle of illumination (from less than 10° to more than 80°).

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“…This observation technique is a novel method in terms of looking into the eye from the corneal surface. In the future, with improved illumination systems, stereoscopic-vision rigid endoscopes, and image processing methods, the possibilities will greatly expand [12–14]. …”

Section: Resultsmentioning

confidence: 99%

Observation of Peripheral Retina by Topical Endoscopic Imaging Method—A Preliminary Study

2013

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IntroductionThis study evaluated the usefulness of rigid endoscopy placed on the corneal surface to observe the peripheral retina.MethodsThe authors studied 15 eyes in 15 patients (12 men, 3 women; mean age 55.9 years; range 22–74 years) that underwent vitreous surgery at the Department of Ophthalmology at Saga University Hospital. With patients in a supine position, after topical anesthesia, an eye cup was placed between the eyelids and filled with hydroxyethyl cellulose solution and physiologic saline. With a rigid endoscope placed near the corneal surface, the target areas were then observed and recorded. The usefulness of rigid endoscopy to observe the peripheral retina was evaluated based on differences due to lens status and pupil size.ResultsIn seven aphakic eyes, irrespective of pupil size, the peripheral retina could be observed up to the entire ora serrata (all quadrants). In eight eyes implanted with an intraocular lens, the observable area changed with pupil size and anterior capsulorrhexis size.ConclusionThis technique using rigid endoscopy was simple to manipulate and useful for observing and recording the peripheral retina. In particular, in aphakic eyes, irrespective of pupil size, the retina could be observed to the ora serrata.

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A novel ultralow-illumination endoscope system

Cited by 8 publications

References 6 publications

Vision-based endoscope tracking for 3D ultrasound image-guided surgical navigation

Vision-based endoscope tracking for 3D ultrasound image-guided surgical navigation

Supercontinuum as a light source for miniaturized endoscopes

Observation of Peripheral Retina by Topical Endoscopic Imaging Method—A Preliminary Study

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