Key Technical Design And Implementation Of Medical Ultrasound Instrument

With economic development, the continuous improvement of people's living standards, people paying more and more attention to their own health, the way the pursuit of a healthy diet, but also increasingly concerned about the diagnosis and treatment of sound and efficient manner. Ultrasound diagnosis of becoming the first choice for doctors and patients.This thesis is based on a research project of medical digital ultrasonic diagnostic equipment, and investigates the front-end control of the ultrasonic diagnostic equipment and the filter design. All the designs were validated on FPGA.First of all, this chapter from the demand for ultrasonic analysis equipment, ultrasonic diagnostic apparatus of the function and principles summed up in detail. At the same time, the overall design of the system program.Then, the author of the system control module and the filter front-end design detail. Including the four parts:1. Emit controling: emit focusing;2. Digital beam forming: dynamic focusing, dynamic aperture;3. Digital signal processing: anti-aliasing filter, digital quadrature demodulation ;4. Interface: SPIAnd then, the method of receiving some control signals from back side to front-end with SPI interface is applied in the design scheme of the front-end. Secondly, we apply the general program design with Matlab GUI in the design scheme of focusing delay calculating of the echo of ultrasonic waves in emitting and receiving period. The algorithms of control design and filter are implemented with Verilog language. Based on the simulation with Matable and Modelsim platforms, we verified that the algorithms meet the requirements of ultrasonic diagnostic equipment.Finally, the project has been completed and work has not yet been completed are summarized. On the FPGA and the direction of development of diagnostic ultrasound have been briefed.