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Laser Technology for Interstitial Hyperthermia

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Interstitial and Intracavitary Thermoradiotherapy

Part of the book series: Medical Radiology ((Med Radiol Radiat Oncol))

Abstract

Laser is an acronym for light amplification by the stimulated emission of radiation. The concept and the basic mathematics were derived by A. Einstein in 1917. Spontaneous emission of radiation occurs when an atom moves down from one energy level to another in the course of which a photon is released. The frequency of this photon depends on the energy gap between the two levels. For this change to happen the atom has to attain a higher than resting energy state and does so by the absorption of radiation of the appropriate amount. This higher energy level is also referred to as excited as the atom is both at a higher level and less stable than at its normal resting level. Einstein proposed that if an atom in its excited state were hit by a photon with the same energy as that emitted on the change from the excited to ground state, then two photons, the original and a second one at the same wavelength, would result. Hence the stimulated emission.

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Authors and Affiliations

  1. Department of Surgery, King’s College School of Medicine and Dentistry, The Rayne Institute, 123 Coldharbour Lane, London, SE5 9NU, UK

    A. C. Steger M.S., F.R.C.S.

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  1. A. C. Steger M.S., F.R.C.S.
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Editors and Affiliations

  1. Strahlentherapeutische Klinik, Universität Erlangen-Nürnberg, Universitätsstraße 27, W-8520, Erlangen, Germany

    M. Heinrich Seegenschmiedt  & Rolf Sauer  & 

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© 1993 Springer-Verlag Berlin Heidelberg

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Steger, A.C. (1993). Laser Technology for Interstitial Hyperthermia. In: Seegenschmiedt, M.H., Sauer, R. (eds) Interstitial and Intracavitary Thermoradiotherapy. Medical Radiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84801-8_9

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  • DOI: https://doi.org/10.1007/978-3-642-84801-8_9

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-84803-2

  • Online ISBN: 978-3-642-84801-8

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