Study On Ccd Based Medical X-ray Digital Radiography System

Medical images play an important role in medical diagnosis, checking treatment effect, confirmation of the treatment plan. X-ray imaging is an important means to obtain medical images. X-ray imaging was developed from film imaging, CR imaging to DR imaging. DR system has many advantages such as high image quality and fast imaging speed and acquisition of digital image directly and powerful image processing function and low radiation dosage, so it is becoming a hot research in X-ray imaging area. In China, the study on DR system and the application of DR system are still in beginning, so DR system has broad prospect in study field and application field.This paper study on the CCD based X-ray digital imaging system, it includes both hardware and software parts. The part of hardware includes scintillation screen,mirror, lens, CCD camera and computer, it is used to take medical images. The part of software is the image capture and processing software, it is used to finish the image capturing, processing and management. In this paper, the main contents include four parts. Firstly, we introduced the design of system structure and working principle and expounded the working principle and performance of components. Secondly, we analyzed the reasons which degrade image quality and studied methods to adjust them. Thirdly, we designed the image acquisition and processing software, which consulted PACS and follows the DICOM standard and can satisfy user's need. Finally, we studied image processing methods, such as space conversion methods and image enhanced methods.The CCD based medical X-ray digital imaging system we developed has good spatial resolution, high dynamic range and high reliability. This system is inexpensive and can be operated easily. It will be widely used in medical diagnosis and it will be helpful for the study and application of DR system.