BACKGROUND: The purpose of this study was to evaluate the sensitometric characteristics of Ultraspeed, Ektaspeed Plus and Insight dental radiographic films using manual and automatic processing systems. METHODS: In this experimental invitro study, an aluminum step-wedge was used to construct characteristic curves for D-, E- and F-speed radiographic films (Kodak Eastman, Rochester, USA). All fil...

New diagnostic and sensor designs are needed for future burning plasma (BP) fusion experiments, having good space and time resolution and capable of prolonged operation in the harsh BP environment. We evaluate the potential of multi-energy x-ray imaging with filtered detector arrays for BP diagnostic and control. Experimental studies show that this simple and robust technique enables measuring ...

It was originally revealed by Einstein [ 1 ] that equilibrium thermodynamics can provide information on the magnitude of statistical fluctuations in thermodynamical systems. In this paper we shall propose a thermodynamical expression for the correlation length 6 of spatial fluctuations of local thermodynamic characteristics. The correlation length is an important quantity of systems, especially...

A prospective in vivo investigation was conducted to determine radiographic and clinical factors associated with contemporary nonsurgical endodontic retreatments. Approximately 1,100 failing endodontically treated teeth were screened to determine an appropriate treatment plan. Using magnification, 337 consecutive retreatment cases were evaluated and treated. The vast majority of the retreated c...

Radiographic inspection is a reliable non-destructive test, widely used for integrity evaluation of structures and equipments. Nowadays, high quality images with very accurate resolutions have been supported by modern digital radiographic systems. However, the image analysis for internal defect detection and geometric characterization is still a not totally automated task. The main reason is th...

The sensitivity of radiographic diagnosis of silicosis in an occupational medical care (primary examination) varied between 39% and 71%, and the specifity between 60% and 99%. This means that, if the prevalence of silicosis in dust exposed population is between 2% and 8%, 23% to 56% of silicosis cases are likely to be falsely diagnosed. The dependence of misdiagnosis of silicosis on the prevale...