Study Of Digital Image Process System In Medicine

With the development of computer, the usage of PACS is in great demand. PACS (Picture Archiving and Communications System) accomplishes the functions used in Medical image, including medical image acquisition, image storage and archiving, image displaying, image processing and communication. Among these, the medical image processing, which is one of the most important core functions in PACS, involves a lot of technology about the image processing, graphics manipulation, 3D data visualization.In this article, we realize a medical image processing system in PACS based on personal computer. In the system we accomplished the function of analyzing medical image which comply with digital image communication in medical, providing the basic function of medical image processing and user interface, constructing volume data from a serial medical CT image, providing the functions include volume data preprocessing, and volume data surface rendering and volume rendering as well, providing visualization control interface. In this article we also describe in detail the theory of medical image processing and analyzing. We described process of medical image visualization as well. In the procedure of implementation basic function, we designed a method to dynamic adjust Windows center/Windows width and image rotate algorithm, which don't change target image dimension. We designed improved image segment algorithm according to image gradient, which improved the speed and accuracy of segment by combining threshold with gradient information. We improved 4-neighbor filling algorithm, decreased the spatial complexity, descent the demand for computer memory. We compared surface rendering and volume rendering and implement series CT image visualization based on VTK.