This paper aims to discuss the issues needed to be considered during the process of defining the registered product standards and industry standards of digital mammographic X-ray camera system. Meanwhile, for the future reference of establishment of standards, it adds the additional technical requirements not only from the features of device's structure, but also from the risk of clinical use.
Mammography ; instrumentation ; standards ; Radiographic Image Enhancement ; instrumentation

On account of different thickness of tissues absorbing different doses of X ray, it is difficult to display anatomical details of different tissues on a single screen of DR equipment. In order to resolve this problem, the self-adaptive reverse S mode transformation algorithm is presented in the paper, which can modify darker regions and brighter regions respectively, and improve the visibility of weakly details.
Algorithms ; Radiographic Image Enhancement ; instrumentation ; methods

OBJECTIVE: To explore the effect of Pareto analysis on the investigation of DR (Digital Radiography) high fault rate. METHODS: The quality control team was established to analyze the causes of DR high fault rate by using the fault statistics of eight DR in our hospital for nearly three years,and to formulate and implement countermeasures,then compare them with the data after rectification. RESULTS: After three months of implementation,the number of DR faults in our hospital decreased from 130 times/quarter to 47 times/quarter,a year-on-year drop was 63.8%.Among them,the number of console faults decreased from 105 times/quarter to 25 times/quarter,a year-on-year drop was 76.2%,close to 80%. CONCLUSIONS Pareto analysis is effective in reducing DR fault rate and is worthy of being promoted to other medical devices.
Humans ; Radiographic Image Enhancement ; instrumentation ; standards

OBJECTIVE: To improve the performance quality of mammography X-ray system, and to decrease misdiagnoses. METHODS: Quality assurance was tested and controlled from such aspect as measurement of half value layer, beam quality assessment, breast entrance exposure average glandular dose, tube tunsion accuracy and reproducibility, and radiation output. RESULTS: The image contrast, mistiness and noise were optimized. CONCLUSION With the quality assurance of the digital mammography X-ray system, the variations of the performance parameters remain in the range of permission, thus improving the quality of mammography.
Humans ; Image Enhancement ; instrumentation ; Mammography ; instrumentation ; methods ; Quality Control ; Radiographic Image Enhancement ; instrumentation

This article analyzes mainly the X-ray imaging acquisition parameters in AXIOM Artis X-ray equipment, the relationship between the parameters, and how to select acquisition parameters in cardioangiography. We have sought a set of X-ray imaging acquisition parameters for producing optimal image in cardioangiography.
Angiography ; instrumentation ; Humans ; Photofluorography ; instrumentation ; Radiographic Image Enhancement ; instrumentation ; methods ; Radiographic Image Interpretation, Computer-Assisted ; instrumentation

In this paper, we designed a testing system for operator control panel of a high-voltage and high-frequency X-ray machine, and an online testing software for functional components, in order to help the testing engineers to improve their work efficiency.
Electricity ; Equipment Design ; Man-Machine Systems ; Radiographic Image Enhancement ; instrumentation

Electrical impedance tomography (EIT) is a novel imaging technology for medical measurements and monitoring. The application technique research of EIT in China may be facing some problems which include electrode performance and evaluation methods, data acquisition and image enhancing, image reconstruction algorithm, characteristic information recognizing and so on. Therefore, some suggestions have also been put forward in the paper to help the designing of a practical EIT system.
Algorithms ; Electric Impedance ; Electrodes ; Image Enhancement ; Tomography ; instrumentation ; methods

OBJECTIVE: To evaluate the efficacy for spatial resolution and radiation dose of a small-field digital mammographic imaging system using parabolic polycapillary optics. MATERIALS AND METHODS: We developed a small-field digital mammographic imaging system composed of a CCD (charge coupled device) detector and an X-ray source coupled with parabolic polycapillary optics. The spatial resolution and radiation dose according to various filters were evaluated for a small-field digital mammographic imaging system. The images of a test standard phantom and breast cancer tissue sample were obtained. RESULTS: The small-field digital mammographic imaging system had spatial resolutions of 12 lp/mm with molybdenum and rhodium filters with a 25-micrometer thickness. With a thicker molybdenum filter (100 micrometer thick), the system had a higher spatial resolution of 11 lp/mm and contrast of 0.48. The radiation dose for a rhodium filter with a 25-micrometer thickness was 0.13 mGy within a 10-mm-diameter local field. A larger field image greater than 10 mm in diameter could be obtained by scanning an object. On the small-field mammographic imaging system, microcalcifications of breast cancer tissue were clearly observed. CONCLUSION: A small-field digital mammographic imaging system with parabolic polycapillary optics may be a useful diagnostic tool for providing high-resolution imaging with a low radiation dose for examination of local volumes of breast tissue.
Equipment Design ; Humans ; Mammography/*instrumentation ; Molybdenum ; Optics and Photonics/*instrumentation ; Phantoms, Imaging ; Radiographic Image Enhancement/*instrumentation ; Rhodium

Here in this paper introduced is an analysis system for X-ray cephalometry developed through Windows platform,which includes three parts: data input, cephalometry analysis & calculation, and display & printing of diagnostic results. It has been applied in orthodontic department of Stomatological Hospital of the Fourth Military Medical University, and it is quite convenient for doctors' cephalometry diagnosis.
Cephalometry ; instrumentation ; Computers ; Humans ; Medical Records Systems, Computerized ; instrumentation ; Orthodontics ; instrumentation ; methods ; Radiographic Image Enhancement ; instrumentation ; Radiography ; instrumentation ; Software

In this paper are analyzed the disadvantages of CGO-3000 digital subtraction angiography table Operating Box. The authors put forward a communication control scheme between single-chip microcomputer(SCM) and programmable logic controller(PLC). The details of hardware and software of communication are given.
Angiography, Digital Subtraction ; instrumentation ; Equipment Design ; Humans ; Image Processing, Computer-Assisted ; instrumentation ; Microcomputers ; Radiographic Image Enhancement ; instrumentation ; Software