Fiber confocal reflectance microscope (FCRM) for in-vivo imaging

Area of Science:

• Biomedical optics
• Medical imaging
• Optical microscopy

Background:

• In-vivo imaging is crucial for early disease detection.
• Confocal reflectance microscopy offers high resolution for cellular characterization.
• Cervical pre-cancerous lesions require sensitive detection methods.

Purpose of the Study:

• To design and evaluate a coherent-fiber-bundle based confocal reflectance microscope for in-vivo imaging.
• To assess the microscope's capability in detecting pre-cancerous cervical lesions by analyzing nuclear-to-cytoplasmic ratio.
• To detail the optical sub-systems and their performance.

Main Methods:

• Development of a fiber confocal reflectance microscope incorporating custom telescope, scan lens, and coupling lens systems.
• Utilized a commercially available microscope objective.
• Performance evaluation using a resolution bar target and human cervical biopsy tissues.

Main Results:

• Achieved a lateral resolution of 2 micrometers.
• Demonstrated an axial resolution of 6 micrometers.
• System sensitivity reached approximately Delta n 0.05 for refractive-index mismatch detection.

Conclusions:

• The developed fiber confocal reflectance microscope is suitable for in-vivo imaging.
• The system shows potential for detecting pre-cancerous cervical lesions through cellular analysis.
• The demonstrated resolutions and sensitivity indicate a promising diagnostic tool.