title: Reflection modeling in ultraviolet phototherapy.
abstract: OBJECTIVE
  Ultraviolet phototherapy is a widely used treatment which has exceptional success with a variety of skin conditions. Over-exposure to ultraviolet radiation (UVR) can however be detrimental and cause side effects such as erythema, photokeratisis, and even skin cancer. Quantifying patient dose is therefore imperative to ensure biologically effective treatment while minimizing negative repercussions. A dose model for treatment would be valuable in achieving these ends.
  
  
  METHODS
  Prior work by the authors concentrated on modeling the output of the lamps used in treatment and it was found a line source model described the output from the sources to a high degree. In practice, these lamps are surrounded by reflective anodized aluminum in patient treatment cabins and this work extends the model to quantify specular reflections from these planes on patient dose.
  
  
  RESULTS
  The extension of the model to allow for reflected images in addition to tube output shows a remarkably good fit to the actual data measured.
  
  
  CONCLUSIONS
  The reflection model yields impressive accuracy and is a good basis for full UVR cabin modeling.
authors.affiliation: School of Physical Sciences, Dublin City University. grimesd2@gmail.com
authors.forename: David Robert
authors.initials: DR
authors.lastname: Grimes
authors.forename: Chris
authors.initials: C
authors.lastname: Robbins
authors.forename: Colin J
authors.initials: CJ
authors.lastname: Martin
authors.forename: Graeme
authors.initials: G
authors.lastname: Phanco
authors.forename: Neil John
authors.initials: NJ
authors.lastname: O'Hare
mesh_terms: D003198:Computer Simulation; D006801:Humans; D008027:Light; D008954:Models, Biological; D010783:Photometry / Q000379:methods*; D011829:Radiation Dosage; D012542:Scattering, Radiation; D012879:Skin Physiological Phenomena / Q000528:radiation effects*; D014467:Ultraviolet Therapy / Q000379:methods*