Ultrasonic Diagnostic Instrument Based On Fpga Design And Implementation Of Signal Processing System

The medical ultrasonic system has become the first choice among the medical imaging devices with advantages of painless, non-destructive, non-ionizing radiation, real-time dynamic and fast repetitive inspection. With the continuous development of ultrasonic imaging techniques, medical ultrasonic devices become more and more feature-rich,while the system integration is getting higher,the volume is getting smaller,and the portability of ultrasound equipments is growing stronger.At the same time, As more and more logic resources are integrated in the FPGA, the performance of functional modules embedded, such as DSP, embedded core continuous improving, the FPGA is advancing in the direction of single-chip system realization. This design is an attempt to use a single FPGA chip to perform ultrasonic imaging process (B-mode ultrasound imaging and color flow imaging).The main work of this paper is as follows:1The implementation of B-mode ultrasonic system based on FPGA:The B-Mode ultrasonic imaging process includes:dynamic filtering, envelope detection, the second sampling, logarithmic compression, the coordinate transformation process and so on. This paper reserch the ways and means of implementation explicitly. and build a B-mode ultrasonic imaging system based on FPGA finally. After that, we download the program to the hardware platform, and see that the B-mode ultrasonic image is displayed on a displayer.2The implementation of color flow imaging based on FPGA. Color flow imaging process including the quadrature demodulator, noise filtering, autocorrelation estimates and frequency-color coding. This paper reserch the ways and means of implementation On this basis, we completed the implementation and functional simulation of these modules.3Build the hardware platform of ultrasonic signal processing systems:This work includes the design of hardware system, the selection of chip, circuit board soldering and debugging.This paper constructed a set of ultrasonic signal processing hardware system Successfully, and the system can complete the imaging of the ultrasonic signal.Through the design, we know it can be built a ultrasonic signal processing systems based on a single FPGA. Monolithic systems can greatly reduce the size and cost of ultrasound devices, improve system portability, stability, and system maintenance and upgrades will also become very convenient.