Double-channel fluorimeter with pulsed excitation of advanced glycation end products in skin

Vladimir N. Grishanov (Login required)
Samara National Research University, Russia

Victor S. Kulikov
Samara National Research University, Russia

Konstantin V. Cherepanov
Samara National Research University, Russia


Paper #3274 received 15 Jan 2018; revised manuscript received 7 Mar 2018; accepted for publication 12 Mar 2018; published online 31 Mar 2018. [Special Section. Workshop “Biophotonics” of the XV all-Russian Youth Samara conference-contest on optics and laser physics].

DOI: 10.18287/JBPE18.04.010506

Abstract

A double-channel diagnostic fluorimeter operating in pulsed mode for in vivo assessment of the content of advanced glycation end products (AGEs) in skin by the autofluorescence integral intensity in the visible spectral region is developed. To excite the fluorescence we use a light-emitting diode with the peak wavelength 365 nm. A green light-emitting diode and an additional photodetection channel are intended to allow for the skin phototype of the patient. The fluorimeter analogue electronics comprises two photodetection channels based on silicon photodiodes. The accepted noise-suppressing circuitry solutions reduce the effect of sun and illumination lamp background light on the digital signal at the output of the 10-bit ADC to the one-bit level in both channels. The digital part of the fluorimeter is based on the Arduino platform. The software controls the operation modes of the fluorimeter, provides the quantitative processing of results, the diagnostic data storage and visualization. The experimental studies demonstrated the capabilities of revealing age-related changes in the skin.

Keywords

skin autofluorescence; fluorimeter; advanced glycation end products; medical diagnostics

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References


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