Imaging And Optimization On Black And White Digital B-mode Ultrasound Diagnosis Equipment

B-mode ultrasound diagnosis equipment spread to hospitals, because of its non-invasive, high sensitivity, low cost, wide application, easy operation, and become an important symbol of hospital modernization. With the electronic technology, computer technology and digital image processing technology's rapid development, B-mode ultrasound diagnosis equipment has won a great space for development. Full digital B-mode ultrasound diagnosis equipment is the current mainstream of development. Ultrasound imaging is to extract useful information from a lot of background noise and then to generate B-mode ultrasound image. The image's quality need to be further improved, further optimization, because it is seriously disturbed by the noise. It is to study on full digital B-mode ultrasound diagnosis equipment's architecture, on full digital B-mode ultrasound diagnosis equipment's data processing, on full digital B-mode ultrasound diagnosis equipment's image enhancement, on full digital B-mode ultrasound diagnosis equipment's image drawing technology in this paper.The major contents of this paper are:①To study on B-mode ultrasound diagnosis equipment's basic architecture and on digital B-mode ultrasound diagnosis equipment's main features, then to propose black and white full digital B-mode ultrasound diagnosis equipment's architecture. Not only to achieve three core digital technologies: Front-end Digital technology, Digital Beam Forming technology, Broadband Probe and Broadband technology in the white and black full digital B-mode ultrasound diagnosis equipment, but also to innovatively introduce the high-performance Windows CE system. The advantage is that to improve the system's real-time, can be flexibly extended interfaces according to need, to provide optimum platform for implementing high-performance drawing technology.②Do data processing in the DSP. DSP is one of components of full digital B-mode ultrasound diagnosis equipment's hardware architecture. RAW data concept is unique to optical imaging in digital cameras, and is introduced into full digital B-mode ultrasound diagnosis equipment's data processing. The traditional data processing method is that 12bit RAW data is directly converted to 8bit grayscale by shift operator, and here is changed. It is replaced by the new method that 12bit RAW data is converted to 16bit RGB, and 16bit RGB is converted to 8bit grayscale. The new method can remain more effective information for later data processing.③Do image enhancement in the DSP. The reason of amalgamation is analyzed from theory during Histogram Equalization algorithm, Logarithm Histogram Equalization algorithm and Order Histogram Equalization algorithm. Then an improved histogram equalization algorithm is brought up to reserve the gray level, named as Remain Gray-level Histogram Equalization algorithm. Use these four algorithms to deal with the original image in MATLAB, obtain four images, and then compare the four images. It is conclusion that Remain Gray-level Histogram Equalization algorithm is best in the four histogram equalization algorithms, because Remain Gray-level Histogram Equalization algorithm take into account both far-field tissue's clarity, near-field tissue's edge detail and reduce noise caused by image enhancement, achieve a good result.④Windows CE system is one of components of full digital B-mode ultrasound diagnosis equipment's software architecture. Windows CE system receive the data from DSP, the data is an array data and has no image format. Use GDI, GDI+ and DirectX to draw B-mode ultrasound image in the three platforms. The three platforms are VIA Embedded Motherboard, INTEL Embedded Motherboard and VMWare Virtual Machine. Compare the results and find the best method. The best method is Combination of GDI + and DirectX. DirectX is used to draw B-mode ultrasound image, and GDI+ is used to draw words, icons and so on.