用于医学超声内窥成像系统的数字编码发射电路  

Coded Excitation Circuit on Medical Ultrasonic Endoscope Imaging System

作　　者：郁道银[1] 鲍静[1] 陈晓冬[1] 温世杰[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津300072

出　　处：《生物医学工程学杂志》2009年第3期484-487,共4页Journal of Biomedical Engineering

基　　金：教育部重点项目"医用超声内窥镜关键技术及数字化研究"资助(106048)

摘　　要：提出一种用于医学超声内窥成像系统的数字编码发射电路,该电路采用双极性高压输出芯片TC6320及其驱动芯片构成。实验证明,该电路可以得到±60 V、脉宽和频率可控的编码信号,工作频率达到30 MHz亦可无失真输出,与传统的脉冲回波超声成像系统相比,数字编码激励技术能够明显改善小功率发射下超声图像的信噪比和超声波束的穿透深度,该方法具有广阔的应用前景。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 ＋60V. It still works well when excitant frequency reaches 30MHz. 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.

关 键 词：超声内窥成像系统 微型超声探头 编码激励 数字编码发射电路 

分 类 号：TP274.53[自动化与计算机技术—检测技术与自动化装置]