TY - GEN
T1 - Evaluation of spatial resolution of near infrared topography using spatial sensitivity profile
AU - Kawaguchi, Hiroshi
AU - Hayashi, Toshiyuki
AU - Kato, Toshinori
AU - Okada, Eiji
N1 - Funding Information:
This work was partly supported by the Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research No.13558116, and Grant-in-Aid for the 21st Century Center of Excellence for Optical and Electronic Device Technology for Access Network from the Ministry of Education, Culture, Sports, Science and Technology in Japan and Tateisi Science and Technology Foundation. The authors thank NTT DoCoMo for the allowance of a travel grant.
Publisher Copyright:
© 2003 SPIE-OSA.
PY - 2003
Y1 - 2003
N2 - A near infrared topographic system is an effective instrument for obtaining an image of brain activation. In the conventional mapping method, the signals detected with the source-detector pairs are simply mapped and interpolated to obtain the topographic image. It is likely that an image reconstruction algorithm using a spatial sensitivity profile will improve the spatial resolution of the topographic image. In this study, a onedimensional distribution of the absorption change in the head model is calculated from the signals detected with various intervals of source-detector pairs by the conventional mapping method and an image reconstruction algorithm using the spatial sensitivity profile to evaluate the limit of spatial resolution of topographic imaging. Small intervals of the source-detector pairs improve the position of the absorption change in the topographic image calculated by both the conventional mapping method and the reconstruction algorithm. The size of the absorption change calculated from the intensity detected with a small interval of the source-detector pairs is sufficiently improved by the image reconstruction algorithm using the spatial sensitivity profile.
AB - A near infrared topographic system is an effective instrument for obtaining an image of brain activation. In the conventional mapping method, the signals detected with the source-detector pairs are simply mapped and interpolated to obtain the topographic image. It is likely that an image reconstruction algorithm using a spatial sensitivity profile will improve the spatial resolution of the topographic image. In this study, a onedimensional distribution of the absorption change in the head model is calculated from the signals detected with various intervals of source-detector pairs by the conventional mapping method and an image reconstruction algorithm using the spatial sensitivity profile to evaluate the limit of spatial resolution of topographic imaging. Small intervals of the source-detector pairs improve the position of the absorption change in the topographic image calculated by both the conventional mapping method and the reconstruction algorithm. The size of the absorption change calculated from the intensity detected with a small interval of the source-detector pairs is sufficiently improved by the image reconstruction algorithm using the spatial sensitivity profile.
KW - Image reconstruction technique
KW - Inverse problem
KW - Topography
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M3 - Conference contribution
AN - SCOPUS:85136153673
T3 - Optics InfoBase Conference Papers
SP - 249
EP - 257
BT - European Conference on Biomedical Optics, ECBO 2003
PB - Optica Publishing Group (formerly OSA)
T2 - European Conference on Biomedical Optics, ECBO 2003
Y2 - 22 June 2003
ER -