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Biomedical subjects

V I Vidiukov

Publications and source records attributed to V I Vidiukov.

At least 19 recordsLinked to original sources
PubMed1989

[Determination of the functioning volume of the liver by multipositional scintigraphy and emission-computed tomography].

The paper is concerned with methods for the determination of the liver volume using polypositional scintigraphy (PS) and computed emission tomography (SPECT). The accuracy of both methods was assessed using a liver phantom. The methods were tested in clinical practice on patients with diffuse liver lesions. A liver volume value compared with values in normometric tables as well as differences between a geometrical volume calculated by PS and a volume calculated by SPECT were of diagnostic importance.

Adult↗
PubMed1989

[Quality control in emission-computed tomography].

The authors considered the major aspects of the control of the quality of computed emission tomography (SPECT), assessed the influence of the physicotechnical parameters of the instrument, parameters of recording of results and methods of their processing on end-results of investigations. The authors propose a list of controlled parameters, methods of testing and their periodicity; they also describe the techniques and results of some phantom studies using SPECT with the Jaszczak phantom.

Filtration↗
PubMed1989

[Evaluation of the severity of damage of the lungs in chronic nonspecific diseases based on a microstructural analysis of scintigrams].

Structural analysis of scintigraphic images was used for assessment of the severity of lung affection in 57 patients with mild, average and severe types of asthma and chronic pneumonia. The results of common methods and microstructural analysis were compared. The use of the latter made it possible to reveal structures which were typical of a various degree of severity in chronic diseases.

Adult↗
PubMed1987

[The microstructural analysis of scintigrams].

A method of assessment of a zone of scintigraphic image based on a textural analysis was proposed. The method was tested by means of an analysis of synthesized images and assessment of 285 scintigrams of various hepatic lesions. The use of the method made it possible to improve the accuracy of differential diagnosis at the expense of defining the structures typical of diffuse and multiple small focal lesions which were undetectable by visualization.

Algorithms↗
PubMed1984

[Clinical significance of in vivo methods of examining lung cancer patients].

The results of the visual evaluation of scintiphotography with MMA-99mTc and studies with 133Xe on 130 patients with different pulmonary pathology (90 with lung cancer) and 40 with nontumorous pulmonary diseases were considered. To improve the reliability of the visual evaluation, the zone and lung coefficients (Kz and K1) were proposed making it possible to raise the specificity of evaluation. The extent of disorders of the blood flow in the lungs was correlated with that of changes defined on the radiographs. In most patients with lung cancer, such disorders exceeded the extent of changes on the radiographs--64.4%. In nontumorous lesions the excess of changes was observed in focal processes (tuberculosis).

Adult↗
PubMed1983

[Quality control of gamma cameras].

The authors present a detailed description of the parameters of gamma-chambers that are necessary to measure in order to assess the quality of the device as a whole. The main concepts have been laid down: resolution, spatial distortion, irregularity of the field of vision of a gamma-chamber, idle time of the system, sensitivity, etc. Methods for the evaluation of the main characteristic of gamma-chambers are considered. A necessity to organize the checking of gamma-chambers in hospitals and other health care facilities and the making up of a common system of assessment are discussed.

Quality Control↗