Dynamic model of the thorax for ECG and ICG studies

J. Hyttinen, Jyrki Lötjönen, P. Kauppinen, M. Saarilampi, R.-K. Mäenpää, M. Jerosch-Herold, J. Zhang, R. Patterson, Jaakko Malmivuo

Research output: Contribution to journalArticleScientificpeer-review


A 3D model of the thorax as a volume conductor representing 18 time instances of the cardiac cycle was constructed. The model is based on 18 sets of MR images representing 56 slices with 0.5 cm slice distance. The image sets were segmented on a two-stage process. The first time set of images was segmented based on 2D semiautomatic region growing method. The volumes occupied by 28 tissue types were determined. In the second phase mapping of the voxels between the other time instances were calculated based on deformable geometry models extending the first segmentation to all 18 time instances. The segmentation is directly useable for finite difference model. The model providing the dynamic properties of the thorax will be applied for forward and inverse problem of electrocardiography and simulation of the impedance cardiography and tomography.
Original languageEnglish
Pages (from-to)81-82
JournalInternational Journal of Bioelectromagnetism
Issue number2
Publication statusPublished - 2002
MoE publication typeNot Eligible


  • segmentation
  • non-rigid registration
  • thorax
  • ECG
  • ICG


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