摘要
目的探索高频超声的血流成像方法和血流图像处理方法，以实现血流成像系统。方法根据红细胞对高频超声的散射规律，使用20MHz超声的机械、线性扫描探头，在一条扫描线上发射多次脉冲，利用脉冲回波相减法提取血流信息。使用模拟血管进行血流成像，并对血流图像进行分析处理。结果用该高频超声灰阶血流成像系统对模拟血流进行成像，得到的血流图像边缘清晰，并且在对血流图像进行处理后，能很好地滤除血管周围组织产生的伪像，以增强血流信息，从而更好地观察血流形态。结论在高频超声条件下，使用单脉冲即可提取较强的浅表血流信号，并通过滤除伪像，能实现高频超声条件下的灰阶血流成像。
Objective To study the method of gray-scale blood flow imaging and image processing in condition of high frequency ultrasound, and the implementation of the system. Methods On the base of research of scattered signals of red blood cells in high frequency ultrasound, 20 MHz ultrasound mechanical and linear scanning probe was used to transmit a number of pulses on a scan line. Pulse-echo subtraction method was used to obtain the blood flow information. At the end, simulated blood vascular was used to conduct flow imaging, and the obtained images were analyzed. Results Experiment results showed that clear blood flow images were obtained using this system. The noise from perivascular tissue could be filtered and the signals from blood flow could be enhanced after image processing. Conclusions In the detection of superficial blood vessel, blood flow signals can be obtained even using single pulse emitting via high frequency ultrasound. The blood flow imaging system can be implemented after image processing.
出处
《国际生物医学工程杂志》
CAS
2016年第2期92-96,I0002,共6页
International Journal of Biomedical Engineering
基金
天津市应用基础及前沿技术研究计划（12JczDJc22500）
关键词
高频超声
灰阶
血流成像
图像处理
High frequency ultrasound
Gray scale
Blood flow imaging
Image processing
