TY - GEN
T1 - Investigation of the Direct and Indirect Signal Contributions of Brain Haematoma in Near Infrared Spectroscopy
AU - Okada, Eiji
AU - Tanigawa, Yukari
AU - Yamada, Yukio
AU - Firbank, Michael
AU - Delpy, David T.
N1 - Funding Information:
This work was supported by TEPCO Research Foundation, the Ministry of Education, Science and Culture of Japan under a Grant-inAid for Developmental Scientific Research No. 012-10091047, and the Engineering and Physical Sciences Research Council (UK).
Publisher Copyright:
© 1998 Optical Society of America.
PY - 1998
Y1 - 1998
N2 - 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.
AB - 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.
KW - (170.3660) light propagation in tissue
KW - (170.7050) turbid media
KW - Monte Carlo prediction
KW - near-infrared spectroscopy
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M3 - Conference contribution
AN - SCOPUS:85135914568
T3 - Optics InfoBase Conference Papers
SP - 7
EP - 10
BT - Advances in Optical Imaging and Photon Migration, AOIPM 1998
PB - Optica Publishing Group (formerly OSA)
T2 - Advances in Optical Imaging and Photon Migration, AOIPM 1998
Y2 - 8 March 1998
ER -