[Show abstract][Hide abstract] ABSTRACT: Aim of study is to develop understanding of the heart electric generator based on classification of current density distribution (CDD) maps with help of information-extreme intellectual technology (IEIT). Error-free decision rules were obtained in learning population. Decision rule for test Healthy-CAD was examined based on 203 healthy volunteers and 256 CAD pts and sensitivity and specificity equal to 93% and 87%, respectively, have been achieved.
[Show abstract][Hide abstract] ABSTRACT: Some improving of small-channel system have been performed, including synthetic channels formed by two physical ones, Principal
Component Analysis (PCA)-based algorithm for de-noising of input signal, and Lead Fields (LF) for 36 spatial channels taking
into account the coverage diagram of gradiometers. Above improvements are directed to increase reliability and signal-to-noise
ratio (SNR) at unshielded environment and also to overcome blurring of current density distribution (CDD) images of the heart
Keywordssynthetic channels-PCA analysis-lead field (LF) of gradientometer
[Show abstract][Hide abstract] ABSTRACT: Biomagnetic measurements such as magneto-cardiography (passive) or biosusceptometry (active) are promising to utilize at biomedical application. Comparison of different SQUID-magnetometers at unshielded environment are performed in order to optimization its designs.
[Show abstract][Hide abstract] ABSTRACT: The aim of the study was to develop SQUID-magnetometer system and to reveal the ability of above system to monitor the dynamics of injected magnetic nanoparticles (MNP) into rabbit’s body. MNP were prepared by first precipitation of ferrous hydroxide which was then crystallized into magnetite in the presence of potassium nitrate as mild oxidizing agent and further the MNP surface was modified with oxidized hidroxyethylstarch. The dynamics of the MNP distribution into the rabbit tissues according to the electron-spin resonance (ESR) data shows that after 60 min of nanomaterial preparation circulation into the rabbit’s body the preparation redistribution occurs in favor of liver and spleen. The magnetic field applying to the kidneys area leads to the considerable increase of iron concentration in kidneys. As a result of magnetic fields measurements over the rabbit with injected MNP using developed SQUID-magnetometry system, the maps of MNP spatial distribution into the rabbit’s body were obtained.
No preview · Article · Apr 2009 · Materialwissenschaft und Werkstofftechnik