Design And Implementation Of Color Ultrasound Control System

The medical ultrasound diagnosis technology is safe, convenient, hurtless, and inexpensive, but conventional medical ultrasound equipment's defect consists in large size and high power consumption. The new generation portable digital ultrasound equipment based on embedded hardware platform and embedded operating system. This equipment can cost less, burn less power and achieve significantly higher performance than conventional equipments. It can carry on nimble ultrasound data processing, thus causes further enhances the imaging quality. And all of these build the foundation of battlefield salvation and long-distance medical service, so it will develop rapidly in future. This thesis obtains from the medical ultrasound diagnosis principle and the design of digital ultrasound equipment; describes the ultrasound data processing sub-modules emphatically; makes simple introduction of the unique feature of programmable logical component, the design principle and the design flow. Next it introduces the distributed algorithm, the median filtering algorithm and time-recursive algorithm, and then describes the detailed method of realizing in FPGA and application in digital ultrasound equipment's signal processing sub-module.On this foundation, this thesis detailedly introduced an imaging hardware system in portable digital ultrasound equipment, this system comprises a FPGA subsystem which had the function of real-time video capture and image pre-processing and an embedded system based on ARM. The FPGA subsystem used FPGA as the central processor. It was composed of digital ultrasound imaging beamformer, dynamic FIR filters, image frame storing control module, image low-level processing module, DMA way and FPGA configuration circuit. The embedded subsystem is developed based on 32bit high performance ARM Processor S3C2410X and embedded operating system LINUX, with some general Interface (such as Ethernet, USB, RS232) expanded. Finally, it introduced an application in LCD display based on Multimedia Companion Chip.This imaging system makes full use of the high performance, low power and low cost of FPGA and ARM microprocessor and the advantage of LINUX, providing an economical and practical solution for the design of portable digital ultrasound equipment.