[Coded excitation circuit on medical ultrasonic endoscope imaging system].
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.
Yu
Daoyin
D
College of Precision Instrument & Opto-electronic Engineering, Tianjin University, Opto-electronic Information Science and Technology Lab, Tianjin 300072, China. dyyu@tju.edu.cn
Bao
Jing
J
Chen
Xiaodong
X
Wen
Shijie
S
D019160:Endosonography / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D014159:Transducers