[Study on illuminant spectrum qualifications for collecting tongue condition]

Area of Science:

• Medical Diagnostics
• Optical Engineering
• Color Science

Context:

• Traditional light sources like daylight and candles are unreliable for tongue diagnosis due to environmental variability.
• Accurate tongue imaging is crucial for medical diagnosis, but inconsistent lighting hinders reliable data collection.
• Electric light sources offer potential for stable and reproducible tongue imaging, but their spectral properties must be carefully considered.

Purpose:

• To evaluate different electric light sources for tongue diagnosis.
• To identify an optimal artificial light source that replicates daylight properties for consistent tongue imaging.
• To provide a theoretical and experimental foundation for selecting appropriate electric illuminants in medical diagnostics.

Summary:

• This study analyzed the spectral properties of four fluorescent lamps to assess their suitability for tongue diagnosis.
• Using spectrum analysis and image identification techniques, researchers compared illuminants based on color rendition and chromatic coordinates.
• The PHILIPS YPZ220/18-3U. RR. D lamp (6500 K correlative color temperature) demonstrated the most similar spectral characteristics to daylight and is recommended as a standard lamp.

Impact:

• Establishes a basis for selecting electric light sources to replace unreliable natural daylight in medical tongue diagnosis.
• Enables more accurate and consistent tongue condition assessment through standardized artificial lighting.
• Improves the reliability of diagnostic imaging by minimizing environmental influences on tongue color and appearance.