Scanning thermoacoustic tomography in biological tissue
Scanning thermoacoustic tomography in biological tissue
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DOI：
10.1118/1.598984
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发表时间：
2000-05-01
期刊：
影响因子：
3.8
通讯作者：
Wang, LHV
中科院分区：
文献类型：
--
作者：
Ku, G;Wang, LHV
探讨了微波热声成像技术对生物组织的成像。微波短脉冲辐照生物组织，通过热弹性膨胀产生声波。微波引起的热声波与聚焦超声换能器检测。来自超声换能器的每个时域信号表示类似于超声A扫描的沿着超声换能器的声轴的一维图像沿着。垂直于超声换能器的声轴扫描系统将生成多维图像。生物组织的二维断层图像，获得了3 GHz的微波。表征了轴向和横向分辨率。对超声换能器响应热声信号的时域压电信号进行了理论模拟，理论结果与实验结果吻合较好。(C)2000年美国医学物理学家协会。【S0094-2405（00）03105-9】。
Microwave-induced thermoacoustic tomography was explored to image biological tissue. Short microwave pulses irradiated tissue to generate acoustic waves by thermoelastic expansion. The microwave-induced thermoacoustic waves were detected with a focused ultrasonic transducer. Each time-domain signal from the ultrasonic transducer represented a one-dimensional image along the acoustic axis of the ultrasonic transducer similar to an ultrasonic A-scan. Scanning the system perpendicularly to the acoustic axis of the ultrasonic transducer would generate multi-dimensional images. Two-dimensional tomographic images of biological tissue were obtained with 3-GHz microwaves. The axial and lateral resolutions were characterized. The time-domain piezo-electric signal from the ultrasonic transducer in response to the thermoacoustic signal was simulated theoretically, and the theoretical result agreed with the experimental result very well. (C) 2000 American Association of Physicists in Medicine. [S0094-2405(00)03105-9].