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The effect of finite-difference time-domain resolution and power-loss computation method on SAR values in plane-wave exposure of Zubal phantom

T M Uusitupa, S A Ilvonen, I M Laakso and K I Nikoskinen

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In this paper, the anatomically realistic body model Zubal is exposed to a plane wave. A finite-difference time-domain (FDTD) method is used to obtain field data for specific-absorption-rate (SAR) computation. It is investigated how the FDTD resolution, power-loss computation method and positioning of the material voxels in the FDTD grid affect the SAR results. The results enable one to estimate the effects due to certain fundamental choices made in the SAR simulation.


PACS

87.55.N- Radiation monitoring, control, and safety

02.70.Bf Finite-difference methods

87.56.Da Ancillary equipment

Subjects

Computational physics

Medical physics

Dates

Issue 2 (21 January 2008)

Received 26 September 2007, in final form 14 November 2007

Published 28 December 2007



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