A wide field-of-view scanning endoscope for whole anal canal imaging

Han, Chunyang; Huangfu, Jiangtao; Lai, Lily; Yang, Changhuei

doi:10.1364/boe.6.000607

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The processed image was cropped, linearized, and digitally zoomed in and was compared to HRA images taken at the same time. Reproducible serial images, taken after successive removals and reinsertions of the device in the porcine model, were also demonstrated, as have been previously reported 10 .…”

Section: Methodssupporting

confidence: 80%

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Feasibility and safety study of a high resolution wide field-of-view scanning endoscope for circumferential intraluminal intestinal imaging

Lai

Invernizzi

White

et al. 2021

Sci Rep

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Global anal cancer incidence is increasing. High resolution anoscopy (HRA) currently screens for anal cancer, although the definitive test remains unknown. To improve on intraluminal imaging of the anal canal, we conducted a first-in-human study to determine feasibility and safety of a high-resolution, wide field-of-view scanning endoscope. Fourteen patients, under an IRB-approved clinical study, underwent exam under anesthesia, HRA, and imaging with the experimental device. HRA findings were photographed using an in-line camera attached to the colposcope and compared with the scanning endoscope images. Patients were followed up within 2 weeks of the procedure. The imaging device is inserted into the anal canal and the intraluminal surface is digitally photographed in 10 s and uploaded to a computer monitor for review. Ten patients completed imaging with the device. Three patients were not imaged due to severe anal stenosis. One patient was not imaged due to technical device malfunction. The device images were compared to the HRA images. No adverse event attributable to the device was reported. The intraluminal scanning endoscope can be used for circumferential anal canal imaging and is safe for clinical use. Future clinical studies are needed to evaluate the performance of this device.

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Section: Methodssupporting

confidence: 80%

“…Device development. The design, development, build, and initial testing of the device in an animal model have been reported 10 . In brief, the imaging device was designed and built to circumferentially image the lumen of the anal canal using the imaging principles adopted from those of commercial flatbed and business card scanners.…”

Section: Methodsmentioning

confidence: 99%

Feasibility and safety study of a high resolution wide field-of-view scanning endoscope for circumferential intraluminal intestinal imaging

Lai

Invernizzi

White

et al. 2021

Sci Rep

Self Cite

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“…Wang et al developed a catadioptric endoscope objective with forward and side views [5]. Han et al developed a novel wide FOV scanning endoscope based on contact image sensor technology to scan the anal canal for 360° and obtain a cylindrical surface image of the canal [6]. Commercial endoscopes exist that can achieve 330° FOV by overlapping the FOV of several lenses located in the front and on the side of the endoscope distal tip (Fuse, EndoChoice, Inc., Alpharetta, Georgia), or even 360° FOV by incorporating a miniature omni-directional camera (Aer-O-Scope, GI-View, Israel).…”

Section: Introductionmentioning

confidence: 99%

Endoscope field of view measurement

Wang

Khanicheh

Leiner³

et al. 2017

Biomed. Opt. Express

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The current International Organization for Standardization (ISO) standard (ISO 8600-3: 1997 including Amendment 1: 2003) for determining endoscope field of view (FOV) does not accurately characterize some novel endoscopic technologies such as endoscopes with a close focus distance and capsule endoscopes. We evaluated the endoscope FOV measurement method (the FOV method) in the current ISO 8600-3 standard and proposed a new method (the FOV method). We compared the two methods by measuring the FOV of 18 models of endoscopes (one device for each model) from seven key international manufacturers. We also estimated the device to device variation of two models of colonoscopes by measuring several hundreds of devices. Our results showed that the FOV method was more accurate than the FOV method, and could be used for all endoscopes. We also found that the labelled FOV values of many commercial endoscopes are significantly overstated. Our study can help endoscope users understand endoscope FOV and identify a proper method for FOV measurement. This paper can be used as a reference to revise the current endoscope FOV measurement standard.

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A high-resolution and large field-of-view scanner for in-line characterization of powder bed defects during additive manufacturing

Seita

2019

Materials & Design

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A wide field-of-view scanning endoscope for whole anal canal imaging

Cited by 4 publications

References 10 publications

Feasibility and safety study of a high resolution wide field-of-view scanning endoscope for circumferential intraluminal intestinal imaging

Feasibility and safety study of a high resolution wide field-of-view scanning endoscope for circumferential intraluminal intestinal imaging

Endoscope field of view measurement

A high-resolution and large field-of-view scanner for in-line characterization of powder bed defects during additive manufacturing

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