Surgical lighting with contrast enhancement based on spectral reflectance comparison and entropy analysis

Shen, Junfei; Wu, Yisi; Liu, An; Chen, Chi; Zheng, Zhou

doi:10.1117/1.jbo.20.10.105012

Cited by 18 publications

(8 citation statements)

References 24 publications

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“…The only surgical specialties where one spectrum was clearly rated as more effective included only a single surgeon, indicating that this result is not generalisable utilising only this data set. Considered together with surgeons' comments during the experiment, and existing research on task-specific spectra, 1,3,20 the relationship between light spectrum and surgical specialty may warrant further study. In any case, the small and unbalanced sample of this study makes demographic-based conclusions tenuous and premature.…”

Section: Discussionmentioning

confidence: 99%

Adjustable correlated colour temperature for surgical lighting

Mundinger

Houser

2017

Lighting Research & Technology

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A surgical luminaire containing two types of phosphor-converted LEDs was employed to illuminate a large midline incision in a 90 kg pig. The PC-LEDs were proportionally blended to create four spectra defined by their approximate correlated colour temperatures: 3000, 4000, 4500 and 5100 K. Sixteen surgeons evaluated the colour appearance of internal anatomy under each spectrum. All four spectra were rated as highly effective. There was no significant difference between the 4000, 4500 and 5100 K spectra. The 3000 K spectrum was rated as less effective, though this does not mean it was ineffective. The spectrum by participant interaction was significant where it could be estimated, suggesting that surgeons may develop individual opinions about which spectra are most effective. While the surgeons moderately agreed that the colour of internal anatomy was altered by the different spectra, they were undecided whether the differences would increase the risk of surgical error or influence surgical decisions. They were also largely undecided whether they would select different spectra during a single procedure, for different procedures, or for different anatomy. Overall, the linear mixing for variable CCT employed in this experiment did not provide obvious utility for surgeons making visual evaluations.

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Section: Discussionmentioning

confidence: 99%

Adjustable correlated colour temperature for surgical lighting

Mundinger

Houser

2017

Lighting Research & Technology

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“…Next, prototyping the designed illuminant and its evaluation is essential for practical use. In [9], [10], the authors optimized the spectra of light-emitting diodes (LEDs) and implemented an LED ceiling system. The authors optimized surgical illuminants by contrast enhancement based on entropy analysis.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Surgical Illuminant Spectra for Organ Microstructure Visualization

et al. 2019

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In a delicate operation, the appearance of organs and tissues is an essential factor for surgeons to figure out the hemodynamic state of the tissue or identify vascular regions. In open surgery, surgeons have a direct view of the surgical area with the naked eye or through a microscope. Under these circumstances, the spectral characteristics of a surgical illuminant are the most effective factor to ensure successful operations. In this study, we designed an optimal surgical illuminant to enhance microvascular structures. Two factors were used in the design: illuminant whiteness and the contrast between tissues and blood vessels. We subsequently prototyped a tunable light source using 14 types of light-emitting diodes (LEDs) with different spectral radiances to reproduce the illuminant spectra of the designed and conventional surgical illuminant. Using this light source, we conducted subjective evaluation experiments with three rat ceca whose detected vessel regions were measured with a conventional and optimal illuminant. We confirmed that the optimal illuminant was significantly superior to the conventional illuminant to view fine vascular structures. INDEX TERMS Light emitting diodes, lighting, surgical instruments, microstructure, color appearance.

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“…Some previous studies used computer simulations to optimize the illuminant [4][5][6]. In [7] and [8] the authors optimized the light-emitting diode (LED) light spectrum for surgical lighting and implemented a LED ceiling system. They optimized the spectrum so as to maximize the gray-level contrast.…”

Section: Introductionmentioning

confidence: 99%

“…We have also been developing an LED-based lighting system designed for surgery [9]. While the authors in [7] and [8] maximized the gray-level contrast, we aimed at maximizing the specific color difference between healthy and ischemic statuses (our first constraint). Another novelty we have considered is the introduction of an additional constraint related to the whiteness of illuminant.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of illuminant for improving intraoperative color appearance of organs

Kurabuchi

Murai

Nakano

et al. 2018

Artif Life Robotics

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When surgeons evaluate the condition of organs and make diagnoses, color difference is important information despite its subtleness. Yielding clearer views of blood circulation holds the key to successful surgeries such as transplants and anastomosis. Optimization of surgical illuminant is one approach to clearer views. Our previous study focused on computer simulation to enhance color difference. In the present study, we improved the simulation method by applying a color appearance model CIECAM02 and we realized an optimized illuminant based on the simulation. In an evaluation experiment comparing the optimal illuminant with the conventional illuminant, fourteen LEDs fixed to the light unit were spectrally adjusted to demonstrate the two illuminants. Using a rat cecum, we observed the color differences under two conditions: normal blood flow and restricted blood flow. The color difference under the optimal illuminant was greater than under the conventional illuminant and the effectiveness of the optimal illuminant was confirmed.

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Surgical lighting with contrast enhancement based on spectral reflectance comparison and entropy analysis

Cited by 18 publications

References 24 publications

Adjustable correlated colour temperature for surgical lighting

Adjustable correlated colour temperature for surgical lighting

Optimization of Surgical Illuminant Spectra for Organ Microstructure Visualization

Optimal design of illuminant for improving intraoperative color appearance of organs

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