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Showing total 3 results
3 results

1. [Tomography reconstruction of optic parameters of biological objects based on the proportional medium approximation].

Author

Potapov DA and Tereshchenko SA

Subjects
Scattering, Radiation, Algorithms, Image Processing, Computer-Assisted methods, Tomography, Optical methods
Abstract

Described in the paper is a reconstruction algorithm for special distributions of optical parameters of biological objects based on the non-stationary axial model of radiation transport in case of proportionality of the absorption and scattering coefficients. The proportionality coefficient, used in reconstruction, is shown to influence a precision of images being restored. The appropriate recommendations are defined of how to diminish the occurring distortions.

Published
2004

2. [Comparison of the efficiency and noise-immunity of the algorithms detecting the shock cardiac rhythms].

Author

Gorbunov BB, Gusev AN, Kamenskiĭ SA, and Selishchev SV

Subjects
Artifacts, Electric Countershock, Humans, Regression Analysis, Shock, Cardiogenic diagnosis, Tachycardia diagnosis, Algorithms, Defibrillators, Electrocardiography, Image Processing, Computer-Assisted methods
Abstract

Comparative assessments of the efficiency and noise immunity of the algorithms detecting the shock cardiac rhythms (SCR) are described in the paper. It is suggested to use the rejection filter of ventricular fibrillation as the principle algorithm for the SCR detection in an automated external defibrillator. The use of the method combining the after-threshold interval and the method of spectral analysis is demonstrated to be preferable for a portable external defibrillator.

Published
2004

3. [Algorithmic and programmed support for Doppler ultrasonic extra- and intracranial study of cerebral blood flow].

Author

Kudriavtsev PS

Subjects
Blood Flow Velocity, Brain blood supply, Brain physiopathology, Cerebrovascular Circulation, Humans, Software, Algorithms, Electronic Data Processing, Image Processing, Computer-Assisted, Ultrasonography, Doppler, Transcranial
Abstract

The paper deals with the automatic processing of a Doppler ultrasonic signal and with the development of the respective software. It outlines the theory of Doppler gram synthesis and the recognition algorithms for typical elements, which are based on the developed theory, for averaged summary blood flow and spectral image of the signal.

Published
1994