Abstract
We present numerical time-domain modeling and valida- tion framework for impulse-driven near-fleld thermoacoustics imaging. It has been recently demonstrated that this new imaging approach comprises a viable alternative for high performance and low-cost imag- ing using the thermoacoustic phenomenon. Placement of the imaged object in a close vicinity (near fleld) of an antenna elements along with generation of ultrashort (nanosecond) duration high-voltage ex- citation impulses further provide high imaging resolution and ensure that su-cient level of electromagnetic energy reaches the object under investigation. In order to analyze the measured results and also provide a design and optimization framework, this work presents a full-wave computational electromagnetic framework which couples the near-fleld electromagnetic fleld to the acoustic signal generation. The numeri- cal method comprises a flnite integral time domain method (FITD) based on the industry standard CST 2010 software package. The re- sults can be further utilized for normalization and quantiflcation of the generated images.
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