Appropriate radiometric quantities and units in laser dosimetry

David H. Sliney

Research output: Chapter in Book/Report/Conference proceedingChapter


Unlike radiofrequency and ionizing radiation which can penetrate deeply into biological tissues, optical radiation is generally absorbed very superficially. Except for the relatively narrow band of visible and near-infrared (IR-A) radiation from approximately 400-1400 nm, skin and other biological tissues are nearly opaque to optical radiation. For this reason, the volumetric or mass-based concepts of absorbed dose (i.e., J/cm3 or J/gm) used in other areas of radiation biology are of little value. Additionally, the absorbed radiant energy is conducted out of the absorbing site and for this reason thermal effects depend largely upon the size and location of the absorbing site as well as exposure and exposure rate. Concepts of surface exposure dose are therefore most useful and practical. The concepts of fluence and fluence rate are shown to be useful for volume scattering in the visible spectral region where photochemical reactions are to be described.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages8
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical - San Jose, CA, USA
Duration: Jan 24 1999Jan 27 1999


OtherProceedings of the 1999 Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical
CitySan Jose, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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