Coherent Narrow-Band Light Source for Miniature Endoscopes

Chen, Zhanyu; Gogoi, Ankur; Lee, Shao-Yu; Tsai-Lin, Yuan; Yi, Po-Wei; Lu, Ming-Kuan; Hsieh, Chih‐Cheng; Ren, Jinchang; Marshall, Stephen; Kao, Fu Jen

doi:10.1109/jstqe.2018.2836959

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…This, in turn, increases the spatial resolution of our sensor for each of the colour bands. These colour bands can then be delivered sequentially using the aforementioned illumination system, or if desired laser illumination [ 36 ], again limited by motion of the probe or tissue in relation to acquisition time.…”

Section: Discussionmentioning

confidence: 99%

Microcamera Visualisation System to Overcome Specular Reflections for Tissue Imaging

et al. 2023

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In vivo tissue imaging is an essential tool for medical diagnosis, surgical guidance, and treatment. However, specular reflections caused by glossy tissue surfaces can significantly degrade image quality and hinder the accuracy of imaging systems. In this work, we further the miniaturisation of specular reflection reduction techniques using micro cameras, which have the potential to act as intra-operative supportive tools for clinicians. In order to remove these specular reflections, two small form factor camera probes, handheld at 10 mm footprint and miniaturisable to 2.3 mm, are developed using different modalities, with line-of-sight to further miniaturisation. (1) The sample is illuminated via multi-flash technique from four different positions, causing a shift in reflections which are then filtered out in a post-processing image reconstruction step. (2) The cross-polarisation technique integrates orthogonal polarisers onto the tip of the illumination fibres and camera, respectively, to filter out the polarisation maintaining reflections. These form part of a portable imaging system that is capable of rapid image acquisition using different illumination wavelengths, and employs techniques that lend themselves well to further footprint reduction. We demonstrate the efficacy of the proposed system with validating experiments on tissue-mimicking phantoms with high surface reflection, as well as on excised human breast tissue. We show that both methods can provide clear and detailed images of tissue structures along with the effective removal of distortion or artefacts caused by specular reflections. Our results suggest that the proposed system can improve the image quality of miniature in vivo tissue imaging systems and reveal underlying feature information at depth, for both human and machine observers, leading to better diagnosis and treatment outcomes.

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Section: Discussionmentioning

confidence: 99%

Microcamera Visualisation System to Overcome Specular Reflections for Tissue Imaging

et al. 2023

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“…The majority of modern surgical lighting illuminates from an external source, a dissecting microscope, into a cavity or is mounted on a surgical instrument, such as retractors, endoscopes, orthoscopic tools, and suction tubes [1][2][3][4][5][6]. However, such conventional implements and instruments are unable to provide sufficient lighting during various surgical procedures.…”

Section: Introductionmentioning

confidence: 99%

A Soft, Biocompatible Magnetic Field Enabled Wireless Surgical Lighting Patty for Neurosurgery

et al. 2020

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General surgical procedures are subject to low-light conditions or a narrow angle of view, and such limitations in light limit visibility and complicate the given surgical procedure. Conventional lighted surgical tools rely on an external light source, which may be oriented into a cavity or mounted on a surgical instrument such as retractor, endoscopes, or suction tubes. However, such conventional lighted instruments do not provide adequate lighting during various surgical procedures. Here, we present a soft, miniaturized magnetic-enabled wireless surgical lighting patty. Specifically, the proposed surgical lighting patty that can be temporarily implanted into a cavity or surgical corridor provides lighting to the surgical subject and manages fluids in a surgical field. The surgical lighting patty is a multilayer patty, two outer layers of the lighted surgical patty and the center lighted layer. A reed switch in the central layer can activate the power supply in response to a magnet to emit the light from the light source. The result allows a dramatically simplified wireless operation. Moreover, it can provide various wavelengths of light to a surgical field for purposes such as illuminating the surgeon’s field of vision, exciting dyes, and sterilizing surgical fields.

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