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Fast Microwave-Induced Thermoacoustic Tomography Based on Multi-Element Phase-Controlled Focus Technique |
| ZENG Lü-Ming;XING Da;GU Huai-Min;YANG Di-Wu;YANG Si-Hua;XIANG Liang-Zhong |
| MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, South China Normal University, Guangzhou 510631 |
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| Cite this article: |
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ZENG Lü-Ming, XING Da, GU Huai-Min et al 2006 Chin. Phys. Lett. 23 1215-1218 |
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Abstract We develop a fast microwave-induced thermoacoustic tomography system based on a 320-element phase-controlled focus linear transducer array. A 1.2-GHz microwave generator transmits microwave with a pulse width of 0.5μs and an incident energy density of 0.45mJ/cm2, and the microwave energy is delivered by a rectangular waveguide with a cross section of (80.01±0.02)×10-4m2. Compared to single transducer collection, the system with the multi-element linear transducer array can eliminate the mechanical rotation of the transducer, hence can effectively reduce the image blurring and improve the image resolution. Using a phase-controlled focus technique to collect thermoacoustic signals, the data need not be averaged because of a high signal-to-noise ratio, resulting in a total data acquisition time of less than 5s. The system thus provides a rapid and reliable approach to thermoacoustic imaging, which can potentially be developed as a powerful diagnostic tool for early-stage breast caners.
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43.35.+d
87.57.Ce
43.60.+d
43.80.+p
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Published: 01 May 2006
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