Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom

Hiroshi Kawaguchi, Eiji Okada

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

1 Citation (Scopus)

Abstract

The poor spatial resolution and reproducibility of the images are disadvantages of near infrared topography. The authors proposed the combination of the double-density probe arrangement and the image reconstruction algorithm using a spatial sensitivity profile to improve the spatial resolution and the reproducibility. However, the proposed method was evaluated only by the simplified adult head model. It is uncertain whether the proposed method is effective to the actual head that has complicated structure. In this study, the proposed method is evaluated by the virtual head phantom the 3D-structure of which is based upon an MRI scan of an adult head. The absorption change the size of which is almost equivalent to the width of the brain gyri was measured by the conventional method and the proposed method to evaluate the spatial resolution of the topographic images obtained by each method. The positions of the probe arrangements are slightly changed and the topographic images of the same brain activation measured by two probe positions are compared to evaluate the reproducibility of the NIR topography. The results indicate that the combination of the double-density probe arrangement and the image reconstruction algorithm using the spatial sensitivity profile can improve both the spatial resolution and the reproducibility of the topographic image of brain activation in the virtual head phantom. However, the uneven thickness of the superficial tissues affects the accuracy of the position of activation in the images.

Original languageEnglish
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6629
Publication statusPublished - 2007
EventDiffuse Optical Imaging of Tissue - Munich, Germany
Duration: 2007 Jun 192007 Jun 21

Other

OtherDiffuse Optical Imaging of Tissue
CountryGermany
CityMunich
Period07/6/1907/6/21

Fingerprint

Image reconstruction
Topography
Infrared radiation
Brain
Chemical activation
Tissue

Keywords

  • Diffusion equation
  • Finite element method
  • Image reconstruction technique
  • Monte Carlo method
  • Near-infrared topography
  • Virtual head phantom

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kawaguchi, H., & Okada, E. (2007). Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 6629). [662906]

Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom. / Kawaguchi, Hiroshi; Okada, Eiji.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6629 2007. 662906.

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

Kawaguchi, H & Okada, E 2007, Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 6629, 662906, Diffuse Optical Imaging of Tissue, Munich, Germany, 07/6/19.
Kawaguchi H, Okada E. Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6629. 2007. 662906
Kawaguchi, Hiroshi ; Okada, Eiji. / Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6629 2007.
@inproceedings{98d7a31c70314ce18a94823b58a20380,
title = "Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom",
abstract = "The poor spatial resolution and reproducibility of the images are disadvantages of near infrared topography. The authors proposed the combination of the double-density probe arrangement and the image reconstruction algorithm using a spatial sensitivity profile to improve the spatial resolution and the reproducibility. However, the proposed method was evaluated only by the simplified adult head model. It is uncertain whether the proposed method is effective to the actual head that has complicated structure. In this study, the proposed method is evaluated by the virtual head phantom the 3D-structure of which is based upon an MRI scan of an adult head. The absorption change the size of which is almost equivalent to the width of the brain gyri was measured by the conventional method and the proposed method to evaluate the spatial resolution of the topographic images obtained by each method. The positions of the probe arrangements are slightly changed and the topographic images of the same brain activation measured by two probe positions are compared to evaluate the reproducibility of the NIR topography. The results indicate that the combination of the double-density probe arrangement and the image reconstruction algorithm using the spatial sensitivity profile can improve both the spatial resolution and the reproducibility of the topographic image of brain activation in the virtual head phantom. However, the uneven thickness of the superficial tissues affects the accuracy of the position of activation in the images.",
keywords = "Diffusion equation, Finite element method, Image reconstruction technique, Monte Carlo method, Near-infrared topography, Virtual head phantom",
author = "Hiroshi Kawaguchi and Eiji Okada",
year = "2007",
language = "English",
isbn = "0819467731",
volume = "6629",
booktitle = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",

}

TY - GEN

T1 - Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom

AU - Kawaguchi, Hiroshi

AU - Okada, Eiji

PY - 2007

Y1 - 2007

N2 - The poor spatial resolution and reproducibility of the images are disadvantages of near infrared topography. The authors proposed the combination of the double-density probe arrangement and the image reconstruction algorithm using a spatial sensitivity profile to improve the spatial resolution and the reproducibility. However, the proposed method was evaluated only by the simplified adult head model. It is uncertain whether the proposed method is effective to the actual head that has complicated structure. In this study, the proposed method is evaluated by the virtual head phantom the 3D-structure of which is based upon an MRI scan of an adult head. The absorption change the size of which is almost equivalent to the width of the brain gyri was measured by the conventional method and the proposed method to evaluate the spatial resolution of the topographic images obtained by each method. The positions of the probe arrangements are slightly changed and the topographic images of the same brain activation measured by two probe positions are compared to evaluate the reproducibility of the NIR topography. The results indicate that the combination of the double-density probe arrangement and the image reconstruction algorithm using the spatial sensitivity profile can improve both the spatial resolution and the reproducibility of the topographic image of brain activation in the virtual head phantom. However, the uneven thickness of the superficial tissues affects the accuracy of the position of activation in the images.

AB - The poor spatial resolution and reproducibility of the images are disadvantages of near infrared topography. The authors proposed the combination of the double-density probe arrangement and the image reconstruction algorithm using a spatial sensitivity profile to improve the spatial resolution and the reproducibility. However, the proposed method was evaluated only by the simplified adult head model. It is uncertain whether the proposed method is effective to the actual head that has complicated structure. In this study, the proposed method is evaluated by the virtual head phantom the 3D-structure of which is based upon an MRI scan of an adult head. The absorption change the size of which is almost equivalent to the width of the brain gyri was measured by the conventional method and the proposed method to evaluate the spatial resolution of the topographic images obtained by each method. The positions of the probe arrangements are slightly changed and the topographic images of the same brain activation measured by two probe positions are compared to evaluate the reproducibility of the NIR topography. The results indicate that the combination of the double-density probe arrangement and the image reconstruction algorithm using the spatial sensitivity profile can improve both the spatial resolution and the reproducibility of the topographic image of brain activation in the virtual head phantom. However, the uneven thickness of the superficial tissues affects the accuracy of the position of activation in the images.

KW - Diffusion equation

KW - Finite element method

KW - Image reconstruction technique

KW - Monte Carlo method

KW - Near-infrared topography

KW - Virtual head phantom

UR - http://www.scopus.com/inward/record.url?scp=36248933713&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36248933713&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0819467731

SN - 9780819467737

VL - 6629

BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE

ER -