一种超高频血管内超声成像系统设计与实现
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国家自然科学基金青年基金资助项目(61302038)

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Design and Implementation of UHF Intravascular Ultrasonic Imaging System
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    摘要:

    介绍了一种超高频(UHF)血管内超声成像系统,该系统基于80 MHz超高频血管内超声探头,运用高性能集成电子芯片实现超声脉冲的发射和回波数据的接收及高速可编程逻辑门阵列(FPGA)芯片实现有限冲激响应(FIR)滤波、包络提取、数字扫描变换等数字信号处理算法。测试结果表明,在80 MHz频率下,系统可接收的最小信号电压为25 μV,在47 dB增益下动态范围可达51 dB。通过钨丝(wire)线模和离体血管的实验,来评估系统的高分辨率成像性能,通过对回波数据-6 dB带宽的分析计算,80 MHz超声探头的轴向分辨率和横向分辨率分别为32 μm和103 μm。实验表明,此系统可实现高分辨率的超声成像效果。

    Abstract:

    This paper presents the development of an intravascular ultrasonic imaging system(IVUS) system that can realize the imaging of ultrahigh frequency.This system is based on the UHF intravascular ultrasonic transducer of 80 MHz.And to achieve the pulse generated and the RF data received using the advanced electronic chip.Most of algorithm functions can be achieved with FPGA programs such as FIR filter,envelope detector, digital scan converter(DSC).Testing results showed that the IVUS system could offer a minimum detectable signal of 25 μV,allowing a 51 dB dynamic range at 47 dB gain,with a frequency of 80MHz. The ultrasonic images of wire phantom and vessels with good resolution were obtained to evaluate the transducer performance. The -6 dB axial and lateral resolutions of the 80 MHz probe were determined to be 32 μm and 103 μm, respectively.The experiment showed that the ultrasonic imaging with high resolution can be obtained by using the proposed IVUS system.

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刘宝强,邱维宝,王祖麟,郑海荣.一种超高频血管内超声成像系统设计与实现[J].压电与声光,2015,37(4):681-683. LIU Baoqiang, QIU Weibao, WANG Zulin, ZHENG Hairong. Design and Implementation of UHF Intravascular Ultrasonic Imaging System[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2015-07-22
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