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New head models extracted from thermal infrared (IR) images for dosimetry computations

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  • Akram Gasmelseed

Abstract

In electromagnetic dosimetry, anatomical human models are commonly obtained by segmentation of magnetic resonance imaging or computed tomography scans. In this paper, a human head model extracted from thermal infrared images is examined in terms of its applicability to specific absorption rate (SAR) calculations. Since thermal scans are two-dimensional (2D) representation of surface temperature, this allows researchers to overcome the extensive computational demand associated with 3D simulation. The numerical calculations are performed using the finite-difference time-domain method with mesh sizes of 2 mm at 900 MHz plane wave irradiation. The power density of the incident plane wave is assumed to be 10 W/m2. Computations were compared with a realistic anatomical head model. The results show that although there were marked differences in the local SAR distribution in the various tissues in the two models, the 1 g peak SAR values are approximately similar in the two models.

Suggested Citation

  • Akram Gasmelseed, 2011. "New head models extracted from thermal infrared (IR) images for dosimetry computations," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 14(07), pages 665-671.
    • Handle: RePEc:taf:gcmbxx:v:14:y:2011:i:07:p:665-671
    DOI: 10.1080/10255842.2011.563738
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