Adjustable correlated colour temperature for surgical lighting

Mundinger, JJ; Houser, Kevin W.

doi:10.1177/1477153517742682

Cited by 12 publications

(9 citation statements)

References 17 publications

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“…Considering the importance of color to dermatology and skin investigations, it is somewhat surprising that there is limited research into optimal exam lights. Surgical lighting has more studies related to optimization for viewing and imaging of specific tissues and applications; 24 , 47 – 50 albeit no universally agreed upon type of light has been identified. Similar to dermatology, surgical lighting that used to rely on halogen bulbs is being replaced with “white” LEDs.…”

Section: Discussionmentioning

confidence: 99%

Dermoscopy and skin imaging light sources: a comparison and review of spectral power distribution and color consistency

et al. 2022

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. Significance: Dermoscopes incorporate light, polarizers, and optical magnification into a handheld tool that is commonly used by dermatologists to evaluate skin findings. Diagnostic accuracy is improved when dermoscopes are used, and some major artificial intelligence (AI) projects have been accomplished using dermocopic images. Color rendering consistency and fidelity are crucial for clinical diagnostics, AI, and image processing applications. Aim: With many devices available on the market, our objective was to measure the emission spectra of various dermoscopes, compare them with other light sources, and illustrate variations in reflected colors from images of a reference sample. Approach: A spectrometer measured the spectral power distribution (SPD) produced by four dermoscope models and three alternate light sources, illustrating differences in the emission spectra. Most dermoscopes use light-emitting diodes (LEDs), which are inconsistent when compared with one another. An LED was compared with halogen, xenon-arc, and daylight sources. Images of a micro ColorChecker were acquired from several sources, and three specific colors were selected to compare in CIELAB color space. Color consistency and color fidelity measured by color rendering index (CRI) and TM-30-18 graphical vectors show variation in saturation and chroma fidelity. Results: A marked degree of variation was observed in both the emission and reflected light coming from different dermoscopes and compared with other sources. The same chromophores appeared differently depending on the light source used. Conclusions: A lack of uniform illumination resulted in inconsistent image color and likely impacted metamerism and visibility of skin chromophores in real-world settings. Artificial light in skin examinations, especially LEDs, may present challenges for the visual separation of specific colors. Attention to LEDs SPD may be important, especially as the field increases dependency on machine/computer vision.

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Section: Discussionmentioning

confidence: 99%

Dermoscopy and skin imaging light sources: a comparison and review of spectral power distribution and color consistency

et al. 2022

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“…Mundinger et al (2019) conducted a study in which surgeons evaluated the color appearance of internal anatomy under lightning with different CCTs. The smallest CCT of 3000 K was rated as less effective compared to 4000 K, 4500 K, and 5000 K [16]. For further With higher CCT, the emission spectrum of a lamp tends to have a higher blue component.…”

Section: Introductionmentioning

confidence: 91%

“…Images taken with light with a high red content (small CCT) result in supersaturated and potentially less informative retinal images, whereas images taken with light with a broader gamut are more balanced and feature a greater color discrimination, which is important, for example, in diabetic retinopathy [15]. Mundinger et al (2019) conducted a study in which surgeons evaluated the color appearance of internal anatomy under lightning with different CCTs. The smallest CCT of 3000 K was rated as less effective compared to 4000 K, 4500 K, and 5000 K [16].…”

Section: Introductionmentioning

confidence: 99%

Determination of Correlated Color Temperature in Ex Vivo Porcine Eyes during Intraocular Illumination

Fehler

Heßling

2023

JCM

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(1) Background: In ophthalmic surgery, white light is mostly applied to illuminate the intraocular space, and ophthalmologists are comfortable working with it. Diaphanoscopic illumination changes the spectral composition of light, resulting in a change in the correlated color temperature (CCT) of the intraocular illumination. This color change makes it difficult for surgeons to recognize the structures in the eye. CCT during intraocular illumination has not yet been measured before, and it is the aim of this study to perform such measurement. (2) Methods: CCT was measured inside ex vivo porcine eyes during diaphanoscopic illumination and endoillumination using a current ophthalmic illumination system with a detection fiber inside the eye. By applying pressure on the eye with a diaphanoscopic fiber, the dependency of CCT on pressure was examined. (3) Results: The intraocular CCT values during endoillumination were 3923 K and 5407 K for the halogen and xenon lamps, respectively. During diaphanoscopic illumination, a strong unwanted red shift was observed, resulting in 2199 K and 2675 K for the xenon and the halogen lamps, respectively. Regarding different applied pressures, the CCT did not differ considerably. (4) Conclusions: This red shift should be compensated for in the development of new illumination systems since surgeons are used to white light illumination, which also simplifies the identification of retinal structures.

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“…These five categories are not exhaustive and may not receive equal prioritization in a design solution. For example, the primary goal in retail lighting may be to encourage sales ( 46 ) and in open surgery visual performance will dominate the design criteria ( 47 ).…”

Section: Foundational Considerationsmentioning

confidence: 99%

Human-Centric Lighting: Foundational Considerations and a Five-Step Design Process

Houser

Esposito

2021

Front. Neurol.

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At its best, human-centric lighting considers the visual and non-visual effects of light in support of positive human outcomes. At its worst, it is a marketing phrase used to healthwash lighting products or lighting design solutions. There is no doubt that environmental lighting contributes to human health, but how might one practice human-centric lighting given both the credible potential and the implausible hype? Marketing literature is filled with promises. Technical lighting societies have summarized the science but have not yet offered design guidance. Meanwhile, designers are in the middle, attempting to distinguish credible knowledge from that which is dubious to make design decisions that affect people directly. This article is intended to: (1) empower the reader with fundamental understandings of ways in which light affects health; (2) provide a process for human-centric lighting design that can dovetail with the decision-making process that is already a part of a designer's workflow.

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Adjustable correlated colour temperature for surgical lighting

Cited by 12 publications

References 17 publications

Dermoscopy and skin imaging light sources: a comparison and review of spectral power distribution and color consistency

Dermoscopy and skin imaging light sources: a comparison and review of spectral power distribution and color consistency

Determination of Correlated Color Temperature in Ex Vivo Porcine Eyes during Intraocular Illumination

Human-Centric Lighting: Foundational Considerations and a Five-Step Design Process

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