| Fast Microwave-Induced Thermoacoustic Tomography Based on Multi-Element Phase-Controlled Focus Technique |
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| 作者姓名： | 曾吕明 邢达 谷怀民 杨迪武 杨思华 向良忠 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60378043 and 30470494, and the Natural Science Foundation of Guangdong Province （015012; 04010394; 2004B10401011）. |
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| 摘 要： | 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 0.5 μs and an incident energy density of 0. 45 mJ/cm^2, and the microwave energy is delivered by a rectangular waveguide with a cross section of （80.01 ± 0.02） × 10^-4 m^2. 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 5 s. 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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| 关 键 词： | 多元相控制焦点技术 线性传感器数组 波导 传感器技术 |
| 收稿时间： | 2005-12-28 |
| 修稿时间： | 2005-12-28 |
Fast Microwave-Induced Thermoacoustic Tomography Based on Multi-Element Phase-Controlled Focus Technique |
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