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Light Based Techniques for Improving Health Care: Studies at RRCAT

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Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Aims and scope Submit manuscript

Abstract

The invention of Lasers in 1960, the phenomenal advances in photonics as well as the information processing capability of the computers has given a major boost to the R&D activity on the use of light for high resolution biomedical imaging, sensitive, non-invasive diagnosis and precision therapy. The effort has resulted in remarkable progress and it is widely believed that light based techniques hold great potential to offer simpler, portable systems which can help provide diagnostics and therapy in a low resource setting. At Raja Ramanna Centre for Advanced Technology (RRCAT) extensive studies have been carried out on fluorescence spectroscopy of native tissue. This work led to two important outcomes. First, a better understanding of tissue fluorescence and insights on the possible use of fluorescence spectroscopy for screening of cancer and second development of diagnostic systems that can serve as standalone tool for non-invasive screening of the cancer of oral cavity. The optical coherence tomography setups and their functional extensions (polarization sensitive, Doppler) have also been developed and used for high resolution (~10 µm) biomedical imaging applications, in particular for non-invasive monitoring of the healing of wounds. Chlorophyll based photo-sensitisers and their derivatives have been synthesized in house and used for photodynamic therapy of tumors in animal models and for antimicrobial applications. Various variants of optical tweezers (holographic, Raman etc.) have also been developed and utilised for different applications notably Raman spectroscopy of optically trapped red blood cells. An overview of these activities carried out at RRCAT is presented in this article.

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Acknowledgments

The authors would like to thank all the members of Laser Biomedical Applications and Instrumentation Division, RRCAT, for their contributions to the work described in this article. Authors would also like to thank Dr. Jogy George and Dr. T. K. Sharma for a critical reading of the manuscript.

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Authors and Affiliations

  1. Laser Biomedical Applications and Instrumentation Division, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India

    P. K. Gupta, H. S. Patel & S. Ahlawat

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  1. P. K. Gupta
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  2. H. S. Patel
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  3. S. Ahlawat
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Correspondence to P. K. Gupta.

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Gupta, P.K., Patel, H.S. & Ahlawat, S. Light Based Techniques for Improving Health Care: Studies at RRCAT. Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci. 85, 489–499 (2015). https://doi.org/10.1007/s40010-015-0251-z

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  • DOI: https://doi.org/10.1007/s40010-015-0251-z

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