Based On X-ray The High Resolution Ccddr Detector The Design And Application Of Research

With the development of the hospital X-ray equipment, the digital and network medical imaging technology has become the direction of the medical diagnosis. For the medical X-ray equipment, the development of high-performance image sensors and digital processing technology and its correction technology has become the core component of the medical enterprise products, its role is to transfer the X-ray attenuation through the object into digital signals, which can be obtained by the computer acquisition system to form a digital image. It has been widely used in the medical field and industrial field testing. Foreign companies such as Thales of France, Canon of Japan, Varian of USA, IDC of Canada and other companies have launched similar DR detectors. They are very expensive, accounting for the half price of the whole machine. The domestic medical enterprises such as Wandong Medical Co. Ltd. and Shanghai Medical Instrument Co. Ltd., mainly rely on imports, greatly increasing the costs of the production and supporting.The research of this dissertation is to track the latest technology, design prototypes and mass production which are put forward based on a 4096 x 4096 x 14 Bit CCDDR detector. A number of fundamental issues and engineering issues are involved for a high-resolution imaging detector CCDDR, which include the basic characteristics of X-ray, X-ray interaction with the matter, X-ray attenuation through the human body, X-ray channel effects on the image quality, the theory of CCDs, CCDDR image correction technology. After the research and analysis on the basis of the above problems, this dissertation conducted a high-resolution CCDDR detector structure design, system functional design, hardware design, software design and other aspects related to engineering design. The dissertation also described the choice of the cesium iodide scintillator and the digital CCD chip, the design of the lens group and the semiconductor electronic chip cooling and sealing system, the processing techniques of the image correction. Studies were done for how to effectively achieve the higher quantum detection efficiency, how to control the introduction of the detector noise outside, how for the digital image correction to ensure the collection of the best images, and other engineering system design problems.In the relevant hospitals, engineering tests have been done for the designed image detector system CCDDR. The system resolution was got up to 4.3 lp/mm, which is better than those of similar products,3.4 lp/mm resolution. We majorly completed clinical tests of the resolution, contrast, the lowest dose rate and X-ray photography of various body parts and other items. Through the clinical testing, it is fully applicable for an ordinary X-ray DR equipment to be upgraded. The upgrade costs are lower, more medical costs can be saved for hospitals to provide the better solutions. In addition, CCDDR detectors can be used for the medical device maker to support the production of X-ray machines to form a higher cost of DR products which can meet X-ray digital imaging needs of the medium and small hospitals.