Work

• I am research associate at UCL Dept. of Computer Science, working with image reconstruction in diffuse optical tomography. My research interests include use of prior information in analysis of optical imaging data, combining optical imaging data with information from other imaging modalities, and brain hemodynamics.
• I am working in the European nEUROPt project.

Publications

Publications in refereed journals

[1] J. Heiskala, M. Pollari, M. Metsaranta, P. E. Grant, and I. Nissila, Probabilistic atlas can improve reconstruction from optical imaging of the neonatal brain, Optics Express 17, 14977-14992 (2009)
[2] J. Heiskala, P. Hiltunen, I. Nissila: Significance of background optical properties, time-resolved information and optode arrangement in diffuse optical imaging of term neonates, Physics in Medicine and Biology, 54, 3, 535-54 (2009)
[3] J. Heiskala, T. Neuvonen, P. E. Grant, I. Nissila:, Significance of tissue anisotropy in optical tomography of the infant brain, Applied Optics Applied Optics, 46, 10, 1633-1640 (2007)
[4] J. Heiskala, I. Nissila, T. Neuvonen, S. Jarvenpaa, and E. Somersalo:, Modeling anisotropic light propagation in a realistic model of the human head, Applied Optics, 44, 11, 2049-2057 (2005)
[5] S. Komssi, P. Savolainen, J. Heiskala, and S. Kahkonen: Excitation threshold of the motor cortex estimated with transcranial magnetic stimulation electroencephalography, NeuroReport, 18, 1, pp. 13-16 (2007)

Publications conference proceedings

[6] J. Heiskala, M. Pollari, M. Metsaranta, P. E. Grant, and I. Nissila, Two approaches for using anatomical atlas information for image reconstruction in optical tomography of neonates, Proc. OSA Topical meeting on Biomedical Optics, 11.-14.4.2010, Miami Beach, USA
[7] J. Heiskala and I. Nissila, Accurate Anatomical Background Model Improves Reconstruction of Absorptive Perturbations in Optical Tomography, in Diffuse Optical Imaging II, R. Cubeddu and A. Hielscher, eds., Vol. 7369 of Proceedings of SPIE-OSA Biomedical Optics, paper 7369_1M, 2009
[8] J. Heiskala, K. Kotilahti, L. Lipiainen, P. Hiltunen, P. E. Grant, I. Nissila: Optical tomographic imaging of activation of the infant auditory cortex using perturbation Monte Carlo with anatomical a priori information, Proc. SPIE Diffuse Optical Imaging in Tissue, 18.-22.6.2007, Munich, Germany
[9] . Hiltunen, J.Heiskala: Localizing Hemodynamic Activations in the Human Brain, . OSA Topical meeting on Biomedical Optics, 19.-22.3.2006, Ft. Lauderdale, USA
[10] T. Tarvainen, M. Vauhkonen, V. Kolehmainen, J. Heiskala, S. R. Arridge, J. P. Kaipio: Modeling Photon Migration in Tissues with the Coupled Radiative Transfer Equation and Diffusion Approximation, Proc. OSA Topical meeting on Biomedical Optics, 19.-22.3.2006, Ft. Lauderdale, USA
[11] J. Heiskala, K. Kotilahti, I. Nissila, An application of perturbation Monte Carlo in optical tomography, Proc. IEEE-EMBC 27th Ann Int Conf of the IEEE Engineering in Medicine and Biology Society, 1.-4.9.2005, Shanghai, China
[12] J. Heiskala, I. Nissila, E. Somersalo, Monte Carlo simulation of light propagation in the human visual cortex, Proc. OSA Topical meeting on Biomedical Optics, 14-17.4. 2004
[13] J. Heiskala, I. Nissila, R. J. Ilmoniemi, A Monte Carlo method in optical tomography, Fysiikan paivat, Helsinki, 20.-22.3.2003