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Lasers in Medical Science

, Volume 29, Issue 2, pp 581–588 | Cite as

The sensitivity in the IR spectrum of the intact and pathological tissues by laser biophotometry

  • Cristian RavariuEmail author
  • Ala Bondarciuc
Original Article

Abstract

In this paper, we use the laser biophotometry for in vivo investigations, searching the most sensitive interactions of the near-infrared spectrum with different tissues. The experimental methods are based on the average reflection coefficient (ARC) measurements. For healthy persons, ARC is the average of five values provided by the biophotometer. The probe is applied on dry skin with minimum pilosity, in five regions: left–right shank, left–right forearm, and epigastrium. For the pathological tissues, the emitting terminal is moved over the suspected area, controlling the reflection coefficient level, till a minimum value occurs, as ARC-Pathological. Then, the probe is moved on the symmetrical healthy region of the body to read the complementary coefficient from intact tissue, ARC-Intact, from the same patient. The experimental results show an ARC range between 67 and 59 mW for intact tissues and a lower range, up to 58–42 mW, for pathological tissues. The method is efficient only in those pathological processes accompanied by variable skin depigmentation, water retention, inflammation, thrombosis, or swelling. Frequently, the ARC ranges are overlapping for some diseases. This induces uncertain diagnosis. Therefore, a statistical algorithm is adopted for a differential diagnosis. The laser biophotometry provides a quantitative biometric parameter, ARC, suitable for fast diagnosis in the internal and emergency medicine. These laser biophotometry measurements are representatives for the Romanian clinical trials.

Keywords

Diagnosis Laser Near-infrared Reflection coefficient Inflammation Statistics 

Notes

Acknowledgments

This work was partially covered by PNII 62063, 12095 and POSDRU 62557 National Programs.

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Copyright information

© Springer-Verlag London 2013

Authors and Affiliations

  1. 1.BioNEC Group, Faculty of ElectronicsPolitehnica University BucharestBucharesRomania
  2. 2.Colentina HospitalBucharesRomania
  3. 3.SC NanoBio-Medical SRLBucharestRomania

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