Microwave interaction with biological tissues

(:title DGTD modeling of microwave interaction with biological tissues:)

(:title Realistic numerical modeling of microwave interaction with biological tissues:)

(:title Realistic numerical modeling of microwave interaction
with biological tissues :)

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The study of the  interaction between electromagnetic waves and living
tissues is  of interest to several applications  of societal relevance
such as the assessment of potential adverse effects of electromagnetic
fields or the utilization  of electromagnetic waves for therapeutic or
diagnostic purposes.  Numerical  modeling  of  electromagnetic  wave
propagation in  interaction  with  biological  tissues  at  microwave
frequencies requires to solve  the system of Maxwell equations coupled
to appropriate models of physical  dispersion in the tissues, such the
Debye and Cole-Cole models.  Since the creation of the team, our works
on this topic  have mainly been focussed on the  study of the exposure
of humans  to radiations from wireless communication  systems.  In the
recent years, we  have studied various DGTD methods  for the numerical
dosimetry analysis  of  the  exposure of  humans  to  electromagnetic
waves.

Numerical simulation of the exposure of a pregnant women to electromagnetic waves emitted by multiple localized sources, using DGTD-P1 and DGTD-P2 methods. This calculation involved an heterogeneous geometrical model of 3 tissues (body of the women, body of the foetus and brain of the foetus) consisting of an unstructured tetrahedral mesh with 5,536,852 tetrahedra (the total number of degrees of freedom for this problem is 132,884,448 for the DGTD-P'_1_' method and 332,211,120 for the DGTD-P'_2_' method). he underlying DGTD method has been ported to a multiple GPU (Graphical Processing Unit) BULL Novascale R422 computing system.  The single precision floating point performance of the DGTD-P1 and DGTD-P2 calculation is  4.7 Tflops and 8.9 Tflops on 128 GPUs.\\
This work  was granted access to  the HPC resources of  CCRT under the allocation 2010-t2010065004 made by GENCI  (Grand Equipement National de Calcul Intensif).

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!!! Related publications

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Numerical simulation of the exposure of head tissues to an electromagnetic wave emitted by a mobile phone, using a DGTD-P1 method. This calculation involved an heterogeneous geometrical model of 4 head tissues (skin, skull, cerebro spinal fluid and brain) consisting of an unstructured tetrahedral mesh with 7,894,172 tetrahedra (the total number of degrees of freedom for this problem is 189,460,128).  The simulation was run on 512 cores of a Bull  Novascale 3045 parallel  system  consisting  of  Intel  Itanium  2/1.6 GHz  nodes interconnected by  a high  performance Infiniband network. This work  was granted access to  the HPC resources of  CCRT under the allocation 2009-t2009065004  made by GENCI  (Grand Equipement National de Calcul Intensif).

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Numerical simulation of the exposure of head tissues to an electromagnetic wave emitted by a mobile phone, using a DGTD-P1 method. This calculation involved an heterogeneous geometrical model of 4 head tissues (skin, skull, cerebro spinal fluid and brain) consisting of an unstructured tetrahedral mesh with 7,894,172 tetrahedra (the total number of degrees of freedom for this problem is 189,460,128).  The simulation was run on 512 cores of a Bull  Novascale 3045 parallel  system  consisting  of  Intel  Itanium  2/1.6 GHz  nodes interconnected by  a high  performance Infiniband network.

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[-This work  was granted access to  the HPC resources of  CCRT under the allocation 2009-t2009065004  made by GENCI  (Grand Equipement National de Calcul Intensif).-]\\\

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