Solid-state semiconductors are better alternatives to arc-lamps for efficient and uniform illumination in minimal access surgery

Lee, Alex C. H.; Elson, Daniel S.; Neil, Mark A. A.; Kumar, Sunil; Ling, Bo; Bello, Fernando; Hanna, George B.

doi:10.1007/s00464-008-9854-7

Cited by 19 publications

(13 citation statements)

References 12 publications

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“…Furthermore, lighting using LEDs is characterized by flat illumination uniformity and better illumination, allowing superior discrimination of fine details in the peripheral endoscopic field. 12 The results of task B confirm that the additional shadow information with the SOIS can improve task performance even under a magnified laparoscopic view resulting from the short LTD. In general, laparoscopic images appear more 2D and few spatial aspects appear in the middle or far range LTDs.…”

Section: Discussionsupporting

confidence: 73%

Soft-light Overhead Illumination Systems Improve Laparoscopic Task Performance

Takai

Takada

Motomura

et al. 2014

Surgical Laparoscopy, Endoscopy &Amp; Percutaneous Techniques

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Section: Discussionsupporting

confidence: 73%

Soft-light Overhead Illumination Systems Improve Laparoscopic Task Performance

Takai

Takada

Motomura

et al. 2014

Surgical Laparoscopy, Endoscopy &Amp; Percutaneous Techniques

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“…The removal of the light fi bers that are usually needed in standard endoscopes using xenon light sources creates more space that can be dedicated to the additional imagers in the FUSE system [14]. This sort of illumination results in a slightly illumination for visual perception [16].…”

Section: Discussionmentioning

confidence: 99%

Accuracy of the Full Spectrum Endoscopy (FUSE) system for assessment of disease activity in Inflammatory Bowel Diseases (IBD) compared to high-definition endoscopy

Albrecht¹,

Tontini²,

Neumann³

2019

Arch Clin Gastroenterol

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Introduction:Recently, Full Spectrum Endoscopy (FUSE) was introduced as a novel colonoscopy platform. In contrast to other endoscopy systems illumination with the FUSE system is achieved by Light-Emitting Diodes (LEDs) and not by a xenon light source. Currently, the FUSE-system does not provide high-defi nition imaging yet. In patients with IBD, precise assessment of disease activity (i.e. mucosal healing) is of paramount importance to predict disease outcome and to guide therapy. Aims:To determine in a comparison study whether FUSE has the potential to assess disease activity in patients with IBD in comparison to a matched cohort of patients undergoing High-Defi nition White-Light Endoscopy (HD-WLE). Materials & methods:Consecutive patients with IBD (n=34) undergoing FUSE colonoscopy were matched to patients with IBD undergoing HD-WLE at the same endoscopy unit. The mucosal vascular pattern and any mucosal abnormalities were recorded. Infl ammation in ulcerative colitis was recorded according to Mayo Ulcerative Endoscopic Score (MUES) and in Crohn´s disease according to Crohn´s Disease Endoscopic Index of Severity (CDEIS). Subsequent to endoscopic characterization targeted biopsies were obtained for histopathological analysis of disease activity.Results: 90 cases were included. Mean age of patients was 37 years (Range 18 to 72 years). 59% of patients had diagnosis of Crohn's disease and 41% diagnosis of ulcerative colitis. Accuracy of FUSE and HD-WL endoscopy for diagnosis of disease activity in IBD was not statistically signifi cant different (83.8% versus 71.7%). The PPV and NPV for FUSE and HD-WLE did not differ signifi cantly. In the subgroup analysis FUSE and HD-WLE endoscopy yielded in underdiagnosis and overdiagnosis of disease activity in 57% versus 46% and 43% versus 54% of not correctly predicted cases, respectively. Overall, FUSE was more accurate for diagnosis of disease activity in Crohn's disease patients, while HD-WL endoscopy was more accurate for diagnosis of disease activity in ulcerative colitis. Conclusion:Despite the use of LEDs resulting in a darker image and high-resolution imaging, the FUSE seems to be equally effective to high-defi nition white-light imaging for diagnosis of disease activity in patients with IBD.

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“…Ankur Gogoi is also sources. In this context, an LED [9], [3], [10], [11], [12], [13], which has recently become a standard light source for endoscopic diagnosis and surgery, despite the inherent advantages of longer lifetime, higher efficiency and lower power consumption, is unfortunately incoherent and therefore needs a fiber bundle [14], [15] for efficient light coupling because of the large LED dispersion angle. Such fiber bundle based light delivery structures typically possess an outer diameter of several millimeters [16], which ultimately overshadows the advantages of miniature CMOS cameras.…”

Section: Introductionmentioning

confidence: 99%

Coherent Narrow-Band Light Source for Miniature Endoscopes

Chen¹,

Gogoi

Lee³

et al. 2019

IEEE J. Select. Topics Quantum Electron.

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In this work, we report the successful implementation of a coherent narrow-band light source for miniature endoscopy applications. A RGB laser module that provides much higher luminosity than traditional incoherent white light sources is used for illumination, taking advantages of the laser light's high spatial coherence for efficient light coupling. Notably, the narrow spectral band of the laser light sources also enables spectrally resolved imaging, to distinguish certain biological tissues or components. A monochrome CMOS camera is employed to synchronize with the time lapsed RGB laser module illumination for color image acquisition and reconstruction, which provides better spatial resolution than a color CMOS camera of comparable pixel number, in addition to spectral resolving.

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Solid-state semiconductors are better alternatives to arc-lamps for efficient and uniform illumination in minimal access surgery

Abstract: The LED endo-illuminator provides more uniform illumination with sharper shadows, less flickering and better illumination for visual perception than the arc-lamp-based system currently used.

Cited by 19 publications

References 12 publications

Soft-light Overhead Illumination Systems Improve Laparoscopic Task Performance

Soft-light Overhead Illumination Systems Improve Laparoscopic Task Performance

Accuracy of the Full Spectrum Endoscopy (FUSE) system for assessment of disease activity in Inflammatory Bowel Diseases (IBD) compared to high-definition endoscopy

Coherent Narrow-Band Light Source for Miniature Endoscopes

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