Y. Phaneendra Kumar and R. M. Vasu, "Reconstruction of optical properties of low-scattering tissue using derivative estimated through perturbation Monte-Carlo method, J. Biomed. Opt. 9, 1002-1012 (2004).

[CrossRef]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

L. Dagdug, G. H. Weill, and A. H. Gandjbakhche, "Effects of anisotropic optical properties on photon migration in structured tissues," Phys. Med. Biol. 48, 1361-1370 (2003).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

D. A. Boas, J. P. Culver, J. J. Stott, and A. K. Dunn, "Three dimensional Monte Carlo code for photon migration through complex heterogenous media including the adult human head," Opt. Express 10, 159-170 (2002).

[PubMed]

C. K. Hayakawa, J. Spanier, F. Bevilacqua, A. K. Dunn, J. S. You, B. J. Tromberg, and V. Venugopalan, "Perturbation Monte Carlo methods to solve inverse photon migration problems in heterogeneous tissues," Opt. Lett. 26, 1335-1337 (2001).

[CrossRef]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

M. Jenkinson and S. Smith, "A global optimisation method for robust affine registration of brain images," Med. Image Anal. 5, 143-156 (2001).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

E. Okada, M. Firbank, M. Schweiger, S. R. Arridge, M. Cope, and D. T. Delpy, "Theoretical and experimental investigation of near-infrared light propagation in a model of the adult head," Appl. Opt. 36, 21-31 (1997).

[CrossRef]
[PubMed]

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

P. J. Basser and C. Pierpaoli, "Microstructural and physiological features of tissues elucidated by quantitative-diffusion-tensor MRI," J. Magn. Reson. Ser B 111, 209-219 (1996).

[CrossRef]

L. H. Wang, S. L. Jacques, and L.-Q. Zheng, "Monte Carlo modeling of photon transport in multilayered tissues," Comput. Methods Programs Biomed. 47, 131-146 (1995).

[CrossRef]
[PubMed]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

E. Okada, M. Firbank, M. Schweiger, S. R. Arridge, M. Cope, and D. T. Delpy, "Theoretical and experimental investigation of near-infrared light propagation in a model of the adult head," Appl. Opt. 36, 21-31 (1997).

[CrossRef]
[PubMed]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

P. J. Basser and C. Pierpaoli, "Microstructural and physiological features of tissues elucidated by quantitative-diffusion-tensor MRI," J. Magn. Reson. Ser B 111, 209-219 (1996).

[CrossRef]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

L. Dagdug, G. H. Weill, and A. H. Gandjbakhche, "Effects of anisotropic optical properties on photon migration in structured tissues," Phys. Med. Biol. 48, 1361-1370 (2003).

[CrossRef]
[PubMed]

E. Okada, M. Firbank, M. Schweiger, S. R. Arridge, M. Cope, and D. T. Delpy, "Theoretical and experimental investigation of near-infrared light propagation in a model of the adult head," Appl. Opt. 36, 21-31 (1997).

[CrossRef]
[PubMed]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

D. A. Boas, J. P. Culver, J. J. Stott, and A. K. Dunn, "Three dimensional Monte Carlo code for photon migration through complex heterogenous media including the adult human head," Opt. Express 10, 159-170 (2002).

[PubMed]

C. K. Hayakawa, J. Spanier, F. Bevilacqua, A. K. Dunn, J. S. You, B. J. Tromberg, and V. Venugopalan, "Perturbation Monte Carlo methods to solve inverse photon migration problems in heterogeneous tissues," Opt. Lett. 26, 1335-1337 (2001).

[CrossRef]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

L. Dagdug, G. H. Weill, and A. H. Gandjbakhche, "Effects of anisotropic optical properties on photon migration in structured tissues," Phys. Med. Biol. 48, 1361-1370 (2003).

[CrossRef]
[PubMed]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

J. Spanier and E. M. Gelbardm, Monte Carlo Principles and Neutron Transport Problems (Addison-Wesley, 1969).

K. Van Leemput and J. Hämäläinen, "A cross-platform software framework for medical image processing," in *Proceedings of the Seventh International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI)*, Part II (Springer, 2004), pp. 1091-1092.

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

L. H. Wang, S. L. Jacques, and L.-Q. Zheng, "Monte Carlo modeling of photon transport in multilayered tissues," Comput. Methods Programs Biomed. 47, 131-146 (1995).

[CrossRef]
[PubMed]

S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, "A Monte Carlo model of light propagation in tissue," in *Dosimetry of Laser Radiation in Medicine and Biology*, G. J. Müller and D. H. Sliney, eds. (SPIE IS, 1989), Vol. 5, pp. 102-111.

M. Jenkinson and S. Smith, "A global optimisation method for robust affine registration of brain images," Med. Image Anal. 5, 143-156 (2001).

[CrossRef]
[PubMed]

S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, "A Monte Carlo model of light propagation in tissue," in *Dosimetry of Laser Radiation in Medicine and Biology*, G. J. Müller and D. H. Sliney, eds. (SPIE IS, 1989), Vol. 5, pp. 102-111.

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

Y. Phaneendra Kumar and R. M. Vasu, "Reconstruction of optical properties of low-scattering tissue using derivative estimated through perturbation Monte-Carlo method, J. Biomed. Opt. 9, 1002-1012 (2004).

[CrossRef]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

P. J. Basser and C. Pierpaoli, "Microstructural and physiological features of tissues elucidated by quantitative-diffusion-tensor MRI," J. Magn. Reson. Ser B 111, 209-219 (1996).

[CrossRef]

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, "A Monte Carlo model of light propagation in tissue," in *Dosimetry of Laser Radiation in Medicine and Biology*, G. J. Müller and D. H. Sliney, eds. (SPIE IS, 1989), Vol. 5, pp. 102-111.

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

F. Schmidt, "Development of a time-resolved optical tomography system for neonatal brain imaging," Ph.D. dissertation (University of London, 1999).

E. Okada, M. Firbank, M. Schweiger, S. R. Arridge, M. Cope, and D. T. Delpy, "Theoretical and experimental investigation of near-infrared light propagation in a model of the adult head," Appl. Opt. 36, 21-31 (1997).

[CrossRef]
[PubMed]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

M. Jenkinson and S. Smith, "A global optimisation method for robust affine registration of brain images," Med. Image Anal. 5, 143-156 (2001).

[CrossRef]
[PubMed]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

J. Heiskala, I. Nissilä, T. Neuvonen, S. Järvenpää, and E. Somersalo, "Modeling anisotropic light propagation in a realistic model of the human head," Appl. Opt. 44, 2049-2057 (2005).

[CrossRef]
[PubMed]

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

C. K. Hayakawa, J. Spanier, F. Bevilacqua, A. K. Dunn, J. S. You, B. J. Tromberg, and V. Venugopalan, "Perturbation Monte Carlo methods to solve inverse photon migration problems in heterogeneous tissues," Opt. Lett. 26, 1335-1337 (2001).

[CrossRef]

J. Spanier and E. M. Gelbardm, Monte Carlo Principles and Neutron Transport Problems (Addison-Wesley, 1969).

K. Van Leemput and J. Hämäläinen, "A cross-platform software framework for medical image processing," in *Proceedings of the Seventh International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI)*, Part II (Springer, 2004), pp. 1091-1092.

Y. Phaneendra Kumar and R. M. Vasu, "Reconstruction of optical properties of low-scattering tissue using derivative estimated through perturbation Monte-Carlo method, J. Biomed. Opt. 9, 1002-1012 (2004).

[CrossRef]

L. H. Wang, S. L. Jacques, and L.-Q. Zheng, "Monte Carlo modeling of photon transport in multilayered tissues," Comput. Methods Programs Biomed. 47, 131-146 (1995).

[CrossRef]
[PubMed]

L. Dagdug, G. H. Weill, and A. H. Gandjbakhche, "Effects of anisotropic optical properties on photon migration in structured tissues," Phys. Med. Biol. 48, 1361-1370 (2003).

[CrossRef]
[PubMed]

S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, "A Monte Carlo model of light propagation in tissue," in *Dosimetry of Laser Radiation in Medicine and Biology*, G. J. Müller and D. H. Sliney, eds. (SPIE IS, 1989), Vol. 5, pp. 102-111.

L. H. Wang, S. L. Jacques, and L.-Q. Zheng, "Monte Carlo modeling of photon transport in multilayered tissues," Comput. Methods Programs Biomed. 47, 131-146 (1995).

[CrossRef]
[PubMed]

E. Okada, M. Firbank, M. Schweiger, S. R. Arridge, M. Cope, and D. T. Delpy, "Theoretical and experimental investigation of near-infrared light propagation in a model of the adult head," Appl. Opt. 36, 21-31 (1997).

[CrossRef]
[PubMed]

G. Marquez, L.-H. Wang, S.-P. Lin, J. A. Schwartz, and S. L. Thomsen, "Anisotropy in the absorption and scattering spectra of chicken breast tissue," Appl. Opt. 37, 798-804 (1998).

[CrossRef]

J. Heiskala, I. Nissilä, T. Neuvonen, S. Järvenpää, and E. Somersalo, "Modeling anisotropic light propagation in a realistic model of the human head," Appl. Opt. 44, 2049-2057 (2005).

[CrossRef]
[PubMed]

Y. Phaneendra Kumar and R. M. Vasu, "Reconstruction of optical properties of low-scattering tissue using derivative estimated through perturbation Monte-Carlo method, J. Biomed. Opt. 9, 1002-1012 (2004).

[CrossRef]

R. C. McKinstry, A. Marthur, J. H. Miller, A. Ozcan, A. Z. Snyder, G. L. Schefft, C. R. Almli, S. I. Shiran, T. E. Conturo, and J. J. Neil, "Radial organization of developing preterm human cerebral cortex revealed by non-invasive water diffusion anisotropy MRI," Cereb. Cortex 12, 1237-1243 (2002).

[CrossRef]
[PubMed]

L. H. Wang, S. L. Jacques, and L.-Q. Zheng, "Monte Carlo modeling of photon transport in multilayered tissues," Comput. Methods Programs Biomed. 47, 131-146 (1995).

[CrossRef]
[PubMed]

D. C. Alexander, C. Pierpaoli, P. J. Basser, and J. C. Gee, "Spatial transformations of diffusion tensor magnetic resonance images," IEEE Trans. Med. Imaging 20, 1131-1139 (2001).

[CrossRef]
[PubMed]

P. J. Basser and C. Pierpaoli, "Microstructural and physiological features of tissues elucidated by quantitative-diffusion-tensor MRI," J. Magn. Reson. Ser B 111, 209-219 (1996).

[CrossRef]

M. Jenkinson and S. Smith, "A global optimisation method for robust affine registration of brain images," Med. Image Anal. 5, 143-156 (2001).

[CrossRef]
[PubMed]

S. J. Kiebel, J. Ashburner, J. B. Poline, and K. J. Friston, "MRI and PET coregistration--a cross validation of statistical parametric mapping and automated image registration," Neuroimage 5, 271-279 (1997).

[CrossRef]
[PubMed]

L. Dagdug, G. H. Weill, and A. H. Gandjbakhche, "Effects of anisotropic optical properties on photon migration in structured tissues," Phys. Med. Biol. 48, 1361-1370 (2003).

[CrossRef]
[PubMed]

S. Nickell, M. Hermann, M. Essenpreis, T. J. Farrell, U. Krämer, and M. S. Patterson, "Anisotropy of light propagation in human skin," Phys. Med. Biol. 45, 2873-2886 (2000).

[CrossRef]
[PubMed]

A. Kienle, F. K. Forster, R. Diebolder, and H. Hibst, "Light propagation in dentin: influence of microstructure on anisotropy," Phys. Med. Biol. 48, N7-N14 (2003).

[CrossRef]
[PubMed]

J. Heino, S. Arridge, J. Sikora, and E. Somersalo, "Anisotropic effects in highly scattering media," Phys. Rev. E 68, 031908 (2003).

[CrossRef]

M. Schweiger, S. R. Arridge, M. Hiraoka, and D. T. Delpy, "Application of the finite element method for the forward model in infrared absorption imaging," in *Mathematical Methods in Medical Imaging*, D. C. Wilson and J. N. Wilson, eds., Proc. SPIE 1768, 97-108 (1992).

[CrossRef]

Biomediucm Bioinformatics Unit, Haartmaninkatu 8, FIN-00290 Helsinki, Finland, http://home.bioinfo.helsinki.fi.

K. Van Leemput and J. Hämäläinen, "A cross-platform software framework for medical image processing," in *Proceedings of the Seventh International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI)*, Part II (Springer, 2004), pp. 1091-1092.

F. Schmidt, "Development of a time-resolved optical tomography system for neonatal brain imaging," Ph.D. dissertation (University of London, 1999).

S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, "A Monte Carlo model of light propagation in tissue," in *Dosimetry of Laser Radiation in Medicine and Biology*, G. J. Müller and D. H. Sliney, eds. (SPIE IS, 1989), Vol. 5, pp. 102-111.

J. Spanier and E. M. Gelbardm, Monte Carlo Principles and Neutron Transport Problems (Addison-Wesley, 1969).

General Electric Company, 3135 Easton Turnpike, Fairfield, Conn. 06828-0001.