Investigation of the Direct and Indirect Signal Contributions of Brain Haematoma in Near Infrared Spectroscopy

Eiji Okada, Yukari Tanigawa, Yukio Yamada, Michael Firbank, David T. Delpy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The direct and indirect contribution of brain haematoma to the near infrared spectroscopy instrument signal has been investigated by both experiment and Monte Carlo prediction. Absorption change by the haematoma (the direct effect) strongly contributes to change in both intensity and mean time of flight of the detected signal when the haematoma is located at or near the surface of the brain. In cases where the haematoma is located more than 10 mm below the brain surface the direct signal effect is negligible. However the haematoma is still indirectly detectable if it causes brain swelling because the detected light intensity is very sensitive to changes in the CSF thickness.

Original languageEnglish
Title of host publicationAdvances in Optical Imaging and Photon Migration, AOIPM 1998
PublisherOptica Publishing Group (formerly OSA)
Pages7-10
Number of pages4
ISBN (Electronic)1557525463
Publication statusPublished - 1998
EventAdvances in Optical Imaging and Photon Migration, AOIPM 1998 - Orlando, United States
Duration: 1998 Mar 8 → …

Publication series

NameOptics InfoBase Conference Papers

Conference

ConferenceAdvances in Optical Imaging and Photon Migration, AOIPM 1998
Country/TerritoryUnited States
CityOrlando
Period98/3/8 → …

Keywords

  • (170.3660) light propagation in tissue
  • (170.7050) turbid media
  • Monte Carlo prediction
  • near-infrared spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials

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