Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Technology, Environmental Sciences, Public, Environmental & Occupational Health, Nuclear Science & Technology, Radiology, Nuclear Medicine & Medical Imaging, Environmental Sciences & Ecology, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0299 Other Physical Sciences, 1117 Public Health and Health Services, Nuclear Medicine & Medical Imaging, 4206 Public health, 5106 Nuclear and plasma physics

Abstract:

Modern X ray image intensifier-TV systems are now commonly permanently coupled to a digital image processing unit for real-time weighted frame averaging and last image hold during fluoroscopy. The problem of carrying out meaningful threshold contrast-detail diameter tests on systems of this type is discussed. A numerical model of the frame averaging process, which includes the effects of the observer and the analogue components of the system is developed and experimentally verified. The importance of the persistence of the analogue components of the system to its performance is discussed.