Abstract
The article is dedicated to the color reproducibility in images obtained on various digital microscopy systems (DMS). This problem can be solved by color calibration with a special slide. ...According to the previously formulated requirements, a slide prototype for DMS color calibration was developed and manufactured. Several color calibration algorithms were tested to choose the best one for minimizing the color difference. Color calibration algorithms were based on polynomials of different degrees with and without cross terms for CIE Lab color fields’ coordinates. This comparison was made with the color slide prototype and two DMSs based on Meiji MT4300 and Olympus BX41 microscopes. The comparison proved the polynomials with cross terms of 3rd and 4th degrees to be the best for DMSs based on Meiji and Olympus microscopes, respectively. The minimal color difference with respect to the true color fields’ coordinates was 0.75 ΔE* and 0.66 ΔE* for Meiji and Olympus, respectively. The results indicate the suitability of the slide prototype for DMS color calibration since it is possible to achieve a color difference below the visually distinguishable threshold of 2.2 ΔE*.
The state and problems of the metrological support of personal blood glucose monitors – glucometers, have been examined and analyzed. It is shown that at present glucometers, like other individual ...measuring instruments for medical applications, are unsuitable for use in the field of telemedicine since there is no metrological support for such measuring instruments. The main problem is the lack of reliable methods and means of remote verification, calibration and transmission of measurement results to medical institutions. The article proposes a method for remote verification of glucometers based on the use of a set of electrical resistances, the values of which correlate with the measured concentration of glucose in the blood. The proposed method has been successfully tested in practice.
The article presents the results of an experimental comparison of the accuracy characteristics of contactless photoplethysmographic systems. The hardware of the experimental setup, the principle of ...the software operation, the measurement technique, and the results of the comparative study are described.
The standards base of the All-Russia Research Institute of Optophysical Measurements (VNIIOFI), the status and calibration capabilities of national primary standards, and further prospects for their ...development in various areas are discussed.
Principles are provided for metrological provisions for evaluation of chemical compound composite nanomaterial parameters and also hierarchies of methods and measurement procedures taking account of ...international experience.
We examine problems involving metrological support of biochemical analyzers designed to measure the optical density of a liquid biological specimen, followed by converting the value obtained to the ...required parameter. We have studied the possibility of using nigrosine solutions to check the metrological characteristics of biochemical analyzers. We propose use of a kit we developed containing optical density standards, as tools for checking biochemical analyzers.
Methods of analyzing the content of trace elements in silicon are considered. Silicon wafers in which the content of iron, copper and manganese were to be determined were investigated using a method ...based on the Hall effect, radiochemical methods and atomic absorption with electrothermal atomization. The results obtained are compared with the aim of determining the most accurate method of analysis.
The results of investigations of the metrological characteristics of standards and photoelectric instruments for electron-optical diagnostics and high-speed optophysical measurements, developed at ...the All-Russia Research Institute of Optophysical Measurements from 1965 to 2010 are presented.
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