Study Of The Novel X-Ray Image Detector And The Imaging System

In the past century, x ray imaging technology was developed from film-screen imaging technology, x ray intensifier imaging technology, computer radiography to flat panel imaging technology and computer tomography, and it is of indelible merits in the fields of medical, nondestructive test, industrial detection and others.In the real time and digital x ray imaging technologies, the flat panel detector imaging technology appeared several years ago and was paid much attention because it has advantages of big visual field and high imaging performance, but it is too expensive for us to import freely. Now, the x-ray image intensifier is often used in the hospital and other x ray imaging application fields, and it is mainly imported from France and Japan because there is no manufacture in China. Compared with the cost of film-screen technology, the cost of the x ray image intensifier is high, and it is often discarded for any defect and its visual field was limited by the difficult production technique. For the analysis, the novel x ray image detector is in need, which must be of big visual field, high imaging performance and low cost for the usual users.Basing on the city science and technology bureau's project of the manufacture of the 12 inch novel x ray image intensifier applied in the anti-terror security test and the province science and technology office's project of the movable digital x ray imaging machine, this paper designed the novel x ray image detector and the x ray imaging system and the content of this dissertation is summarized as follows:Chapter one introduced the x ray imaging technology and its development mainly, and led to the background and the meaning of this dissertation.Chapter two introduced mainly the x ray imaging system's design principles and its components' characteristics which included the matching requirements for the spectral compatibility and the pixel number. The novel combined x ray image detector is the key device of the x ray imaging system and obviously, it is also the key content of this chapter. To analyze the imaging performance of this x ray image detector, a mathematic relation about the resolution was modeled. The spectral matching factors between the x ray intensifying screen and the photo cathode were calculated. The resolution requirement for video system, such as the CCD camera and displayer was given by some formulas. All these data are referential to the x ray system' imaging performance and can reduce the information loss in the imaging course.Chapter three analyzed the x ray imaging system's imaging performance in the image...