Concentrated photoactivation: Focusing light through scattering

Ana Teresa Gabriel, Jorge Machado, Rui B. Gomes, João Miguel Pinto Coelho, Catarina Oliveira Silva, C. P. Reis, José Paulo Santos, Pedro Vieira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


Light has long being used in medicine; however, the high scattering of biological tissues always hindered its use. The aim of this work is the development of methodologies to focus light inside biological tissues. Geant4/GAMOS Monte Carlo platform was used to simulate the possibility of parameterize the time delay of multiple sources of external light, offset in time, as a function of the interest region position in order to create constructive interferences in a breast sample. A computational model was implemented and the platform was configured in order to perform these simulations. Preliminary results using a single light source were performed. It was concluded that scattering in adipose tissue is very high which is consistent with previous studies.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering, 2015
PublisherSpringer Verlag
Number of pages4
ISBN (Electronic)978-331919387-8
Publication statusPublished - 2015
EventWorld Congress on Medical Physics and Biomedical Engineering, 2015 - Toronto, Canada
Duration: 7 Jun 201512 Jun 2015


ConferenceWorld Congress on Medical Physics and Biomedical Engineering, 2015


  • Biological tissues phantom
  • GAMOS. Near-infrared spectroscopy
  • Geant4
  • Scattering


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