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[Coded excitation circuit on medical ultrasonic endoscope imaging system]
Daoyin Yu1, Jing Bao, Xiaodong Chen
1College of Precision Instrument & Opto-electronic Engineering, Tianjin University, Opto-electronic Information Science and Technology Lab, Tianjin 300072, China. dyyu@tju.edu.cn
Abstract:
In this paper, we introduce a coded excitation circuit for medical ultrasonic endoscope imaging system. This circuit is composed of TC6320 and its drive chip. The experiment demonstrates that this circuit can export frequency-adjustable, duration-controllable coded signals, and its voltage reaches +/-60 V. It still works well when excitant frequency reaches 30 MHz. Compared with the conventional medical ultrasonic pulse-echo imaging system, this coded excitation system has the potential of higher SNR and deeper penetration depth, especially for the small emission power system. This method has a bright future.
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