Temat: ekg - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The EKG signal measurement and the influence of alpine conditions on heart actions
Autorzy:: Sapota, G.
Wróbel, Z.
Powiązania:: https://bibliotekanauki.pl/articles/333688.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG
GPRS
Opis:: This work presents the possibility of measuring heart action parameters in the alpine conditions as well as the measuring system, which helps to measure and transmit EKG signal with the aid of GPRS net. The GPRS transmission makes the estimation of heart action on - line possible. Thanks to it, it is possible to monitor the reaction of human organism being on a certain level of height. GPRS net application enables the measuring in the whole world. The charge for using this net is only dependent on the quantity of transmitted data which needs the signal compression. This work also mentions the possibility of compression use, which takes the advantage of temporal and frequency decomposition.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 7; KB99-103
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: ECG 3D mapping and its clinical applications, a preliminary study
Autorzy:: Adamusiak, T.
Zajdel, R.
Jacymirski, M.
Szczepaniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/333057.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG
odwzorowanie 3D
electrocardiography
3D mapping
Opis:: The inverse electrocardiography was under development for many years. In this novel approach one application was elaborated and described in this paper; with 3D real–time visualisation of ECG tracings on a PC. Using the electrocardiography data–stream from the chest leads, electrical excitation sequence was visualised — by the non–invasive technique, supported by the three–dimensional model of heart.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; II3-6
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Simultaneous recording and analysis of direct and indirect fetal electrocardiography
Autorzy:: Matonia, A.
Jeżewski, J.
Kupka, T.
Horoba, K.
Bernys, M.
Powiązania:: https://bibliotekanauki.pl/articles/333338.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG płodu
monitorowanie płodu
fetal electrocardiography
fetal monitoring
Opis:: Recording and analysis of fetal heart rate variability is still the most common method for detection of early symptoms of fetal hypoxia. However, fetal heart rate obtained via ultrasound describes only mechanical activity of fetus heart. Limitations of this technique have stimulated the development of fetal electrocardiography. It ensures more precise determination of fetal heart rate and, which is more important, enables assessment of the morphology of the fetal QRS complexes. In this paper two techniques of obtaining the fetal electrocardiogram are described and their comparative study is presented.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; MM111-118
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Influence of defibrillation treatment on some electrical parameters and application safety of ECG electrodes
Autorzy:: Ochocki, M.
Latos, S.
Powiązania:: https://bibliotekanauki.pl/articles/333268.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG
elektrody
defibrylacja
impedancja
bezpieczeństwo
ECG
electrodes
defibrillation
impedance
safety
Opis:: The subject of examination was mainly the determination of safety of available ECG electrodes use in conditions of defibrillation treatment in monitored patients. The electrodes of four European producers used in healthcare have been tested. For reason of periods of electrodes obtaining and their physical condition, the examinations have comprised four selected years and 7 types of electrodes. For testing needs, the electrodes were glued into pairs, in gel-to-gel mode. Testing was based on requirements of globally used American ANSI⁄AAMI EC 12:2000⁄(R)2010 standard for disposable ECG electrodes. For the electrodes pairs tested, determined was the influence of fourfold defibrillation release on polarization potential and their impedance measured with the current of 10 Hz frequency. It has been generally found that in result of fourfold exposition to defibrillating pulse the drop of impedance occurred in all tested, electrode pairs. For each electrodes series, mean value of this drop falls into interval of 10,8% to 57%. It was also pointed out that the ECG electrodes examined, while complying to requirements of the standard, allow the operator to perform the defibrillation procedure safely, including the possibility to fast evaluate the defibrillation result basing on ECG waveform recorded. Such general estimation of safety level of the available European ECG electrodes may be used as some reference in today very diversified market as to provenience end quality of products.
Źródło:: Journal of Medical Informatics & Technologies; 2012, 19; 133-139
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Assesment of low-frequency response of ECG recorders in relation to international requirements
Autorzy:: Gibiński, P.
Owczarek, A.
Powiązania:: https://bibliotekanauki.pl/articles/333784.pdf
Data publikacji:: 2002
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: analiza EKG
międzynarodowe wymogi
ECG analysis
ST-segment
international requirements
Opis:: Electrocardiography (ECG) is commonly used non-invasive procedure for recording electrical activity of the heart. It is a powerful clinical non-invasive tool for proper diagnosis and therapy of cardiac abnormalities. Thus, accurate reproduction of the ECG is required especially if diagnosis making process is supported by automatic measurements and their interpretation. The paper presents an assessment of lowf-requency response of selected ECG recorders in relation to international requirements. Four recorders have been selected and tested according to IEC draft 62D: 60601-2-51/Ed.1 and the results have been discussed.
Źródło:: Journal of Medical Informatics & Technologies; 2002, 4; MT63-72
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Characteristic points detection in ECG signal using Bayesian learning and fuzzy system
Autorzy:: Momot, M.
Momot, A.
Powiązania:: https://bibliotekanauki.pl/articles/333840.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: sygnał EKG
systemy rozmyte
ECG signal
fuzzy systems
bayesian learning
Opis:: Characteristic points detection such as beginnings and ends of P-wave, T-wave or QRS complex is one of primary aims in automated analysis of ECG signal. The paper presents one possible approach based on Bayesian inference to design of kernel based classifier. The classification function is constructed using the probability distribution function of standard normal distribution and independent Gaussian random variables. The parameters of such variables are computed using iterative Expectation-Maximization algorithm. This approach is used to calculate parameters of classification function to modelling Takagi-Sugeno-Kang fuzzy systems. Numerical experiment of characteristic points detection in ECG signal using CTS database is also presented.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 171-176
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Comparing methods of ECG respiration signals derivation based on measuring the amplitude of QRS complexes
Autorzy:: Kikta, A.
Augustyniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/333821.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG
sygnał oddechowy
wykrywanie bezdechu
ECG
EDR
respiratory signal
apnea detection
Opis:: This paper presents the study of algorithms for derivation of respiration waveform from the electrocardiogram. The problem has considerable clinical impact, because the heart rate and respiration are both driven by the central nervous system, and commonly used low-cost Holter recording may be used for efficient detection of breath disturbances (e.g. apnea). Three methods based on: heart rate, heart position and lung resistance influencing the ECG amplitude were compared in our research. Among 18 volunteers breathing at a controlled frequency all implemented algorithms show acceptable sensitivity of order of 97% in slow breathing phases detection. In fast breathing the sensitivity is reduced to 90%, since the heart beats are too sparse with regard of respiration waveform.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 155-163
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Optimizing the machine description of electrocardiogram
Autorzy:: Augustyniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/333326.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: interpretacja EKG
przenośne urządzenie medyczne
telemedycyna
electrocardiogram interpretation
wearable medical devices
telemedicine
Opis:: The electrocardiogram is a digital record of effective action potentials of heart muscle fibres, thus it contains an important information about the heart function. Unfortunately, the signal theory-based description of the ECG contents is not efficient in extracting these data, and the practical interpretation software is mostly based on heuristic statements. This conclusion was a motivation for our research on the expert-like machine reasoning based on ECG perception analysis, physiology-driven feature extraction and fuzzy logic. This paper highlights the aspect of optimal description of an electrocardiogram contents in a digital record.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; MM41-48
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Empirical Bayesian averaging method and its application to noise reduction in ECG signal
Autorzy:: Momot, A.
Momot, M.
Łęski, J.
Powiązania:: https://bibliotekanauki.pl/articles/333575.pdf
Data publikacji:: 2006
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: sygnał EKG
średnia ważona
wnioskowanie bayesowskie
ECG signal
weighted averaging
Bayesian inference
Opis:: An electrocardiogram (ECG) is the prime tool in non-invasive cardiac electrophysiology and has a prime function in the screening and diagnosis of cardiovascular diseases. However one of the greatest problems is that usually recording an electrical activity of the heart is performed in the presence of noise. The paper presents empirical Bayesian approach to problem of signal averaging which is commonly used to extract a useful signal distorted by a noise. The averaging is especially useful for biomedical signal such as ECG signal, where the spectra of the signal and noise significantly overlap. In reality the variability of noise can be observed, with power from cycle to cycle, which is motivation for weighted averaging methods usage. It is demonstrated that by exploiting a probabilistic Bayesian learning framework, it can be derived accurate prediction models offering significant additional advantage, namely automatic estimation of 'nuisance' parameters. Performance of the new method is experimentally compared to the traditional averaging by using arithmetic mean and weighted averaging method based on criterion function minimization.
Źródło:: Journal of Medical Informatics & Technologies; 2006, 10; 93-101
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: The Fuzzy Relevance Vector Machine and its application to noise reduction in ECG signal
Autorzy:: Momot, A.
Momot, M.
Łęski, J.
Powiązania:: https://bibliotekanauki.pl/articles/333828.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: systemy rozmyte
wnioskowanie bayesowskie
sygnał EKG
fuzzy systems
Bayesian inference
ECG signal
Opis:: The paper presents new method called the Fuzzy Relevance Vector Machine (FRVM), a modification of the relevance vector machine, introduced by M. Tipping, applied to learning Takagi-Sugeno-Kang (TSK) fuzzy system. Moreover it describes application of the FRVM to noise reduction in ECG signal. The results of the process are compared to those obtained using both Least Squares method for learning output functions in TSK rules and commonly used method using a low-pass moving average filter.
Źródło:: Journal of Medical Informatics & Technologies; 2005, 9; 99-105
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Weighted averaging of ECG signals based on partition of input set in time domain
Autorzy:: Momot, A.
Momot, M.
Łęski, J.
Powiązania:: https://bibliotekanauki.pl/articles/333836.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: sygnał EKG
ważone uśrednianie
redukcja hałasu
ECG signal
weighted averaging
noise reduction
Opis:: The paper presents new approach to problem of signal averaging which is commonly used to extract a useful signal distorted by a noise. The averaging is especially useful for biomedical signal such as ECG signal, where the spectra of the signal and noise significantly overlap. In reality can be observed variability of noise power from cycle to cycle which is motivation for using methods of weighted averaging. Performance of the new method, based on partition of input set in time domain and criterion function minimization, is experimentally compared with the traditional averaging by using arithmetic mean, weighted averaging method based on empirical Bayesian approach and weighted averaging method based on criterion function minimization.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 165-170
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: An application of robust filters in ECG signal processing
Autorzy:: Pander, T.
Powiązania:: https://bibliotekanauki.pl/articles/333513.pdf
Data publikacji:: 2006
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: filtrowanie robust
EKG
EMG
filtrowanie mean-median
robust filtering
ECG
mean-median filtering
Opis:: Robust filtering is a very promising area in application of biomedical signal processing. Signals are usually recorded with noise, which has various characteristics of baseline wander to very impulsive nature. The robust technique has been recently proposed as the tool to eliminate outliers in data samples. The main purpose of this paper is to present mean-median filters in application of ECG signal processing. The presented filter is evaluated in the presence of real muscle noise and simulated impulsive noise as a Gaussian-Laplace mixture. In order to suppress a noise with the best possible means, the special expression is proposed. The measure of distortions, which are introduced to a signal after operation of filtering, is estimated using the normalized mean square error. This factor is used to compare a quality of considered filters. Experimental results show improved performance according to the reference filters.
Źródło:: Journal of Medical Informatics & Technologies; 2006, 10; 113-123
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: State-space averaging for maternal ECG suppression
Autorzy:: Kotas, M.
Jeżewski, J.
Kupka, T.
Matonia, A.
Powiązania:: https://bibliotekanauki.pl/articles/333145.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: EKG płodu
detektor QRS
fetal ECG
QRS detector
dynamic time warping
embedding operation
Opis:: In this paper a new method of maternal electrocardiogram suppression for fetal component extraction from one-channel maternal abdominal bioelectric signals is proposed. The method performs maternal ECG estimation by application of state-space averaging. The estimated signal is subtracted from the original one and this way suppressed. The method parameters allow us to balance between the precision of maternal ECG suppression and the necessity not to attenuate the fetal QRS complexes. A small database of the maternal abdominal bioelectric signals is used to investigate the developed system for fetal heart rate determination. The final assessment is based on the detection performance index. It is shown that by proper choice of the parameters we can tune the system so that it is more effective than the classical approach based on template subtraction.
Źródło:: Journal of Medical Informatics & Technologies; 2009, 13; 194-200
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: An application of the Lp-norm in robust weighted averaging of biomedical signals
Autorzy:: Pander, T.
Przybyła, T.
Czabański, R.
Powiązania:: https://bibliotekanauki.pl/articles/333017.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: robust weighted averaging
Lp-norm
ECG signal
solidna uśredniania ważona
Lp-norma
sygnał EKG
Opis:: Averaging is one of the basic methods of statistical analysis of experimental data where the response of the system is periodic or quasi-periodic. As long as the noise are Gaussian, the standard averaging leads to good results and effective noise reduction. However, when the distortions have impulsive nature, then such an approach leads to a deterioration of the system. In this case the robust methods should be applied which are characterized by resistance to a statistical sample spoken. In this work a robust averaging method based on the minimization of a scalar criterion function using a Lp-norm functions are presented. The effectiveness of the proposed method was tested in an averaging periods aligned ECG signal cycles in the presence of impulse noise.
Źródło:: Journal of Medical Informatics & Technologies; 2013, 22; 71-78
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Implementation of wavelet compression of the electrocardiogram in signal processor
Autorzy:: Kowacki, Ł.
Augustyniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/333815.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: kompresja EKG
przekształcenia falkowe
detekcja zespołu QRS
electrocardiogram compression
wavelet transformation
QRS complex detection
Opis:: The paper presents the study of the algorithm of wavelet compressor dedicated to electrocardiographic signals and results of its implementation in the signal processor SHARC ADSP-21364. The designed compressor is characterized by a work in the real time and with possibility of the separate compression of the signal about the higher diagnostic worth determined as the QRS complex.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 147-153
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "ekg" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język