Wyniki wyszukiwania - Biblioteka Nauki

1

Wireless transmission of photoplethysmographic signals

100%

Hulewicz A. , Cysewska-Sobusiak A. , Boltrukiewicz M.

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tom Vol. 45, nr 8-9

142-145

EN

A system that allows wireless transmitting photoplethysmographic signals (PPG signals) with the use of the GPRS network has been performed. The examined analog pulse waveforms were converted to digital signals and delivered to a transceiver RS232C-GPRS. Selected examples of results, which were obtained during investigations made on a number of real PPG signals, are presented.

PL

Zaproponowano system do transmisji sygnału fotopletyzmograficznego (PPG) drogą bezprzewodową z wykorzystaniem sieci GPRS. Badane przebiegi fali tętna, po przetworzeniu na postać cyfrową, są przesyłane do transceivera RS232C-GPRS. Przedstawione wyniki przykładowych transmisji otrzymano podczas badań dotyczących rzeczywistych przebiegów fali tętna.

2

Independent component analysis and adaptive filtering as successful tools for an improvement of normogastric rhythm extraction in electrogastrographic signals

100%

Tkacz E. , Mika B.

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2010

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tom Vol. 16

27--34

EN

The aim of this study was to investigate the possibility of combining two methods: Independent Component Analysis (ICA) and Adaptive Signal Enhancement for the improvement of normogastric rhythm extraction from multichannel recording of electrogastrographic signals (EGG). Unfortunately the electrogastrogram, is a transcutaneous measurement of gastric electrical activity, does not contain pure signal but usually is a sort of mixture from both electrical activity of stomach as well as other organs surrounding it and random noise. In order to benefit the diagnostic power of multichannel recording of EGG, which can provide deeper understanding of gastric disorders, it is necessity to extract gastric slow wave in each channel. One of the parameters, which are analyzed and require proper registration is so called normogastric rhythm. According to the literature, the normogastric rhythm should cover around 70% of rhythmic behavior of signal for a healthy man. Proper extraction of basic 3-cpm normogastric rhythm in each channel is a subject of this paper. Independent Component Analysis is applied for extracting the reference signal for adaptive filtering what next result in obtaining less contaminated signal in each channel. Analysis has been perform for two postprandial phases with five minutes break between them. In both mention cases proposed procedure gives a promising results.

3

Zastosowania analizy ruchu oczu w diagnostyce chorób neurodegeneracyjnych

100%

Borys M.

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tom nr 2

55--63

PL

Badania okulograficzne są nieinwazyjne, a sprzęt okulograficzny coraz bardziej dostępny, dlatego też rośnie jego popularność w diagnostyce medycznej oraz innych obszarach zastosowań. Artykuł prezentuje możliwości dotyczący zastosowania badań okulograficznych w diagnostyce chorób neurodegeneracyjnych takich jak Parkinson, czy Alzheimer. Autorka koncentruje się na przestawieniu charakterystyki badania okulograficznego, modelu detekcji podstawowych zdarzeń takich jak fiksacje i sakkady, a także na przykładach badań zaburzeń okoruchowych w wybranych chorobach neurodegeneracyjnych.

EN

Eye-tracking allows for non-invasive examination and the same eyetrackers are becoming more available, thus its popularity in medical diagnosis and other fields of application is increasing. The paper presents the possibilities for using eye-tracking in the diagnosis neurodegenerative disease such as Parkinson or Alzheimer diseases. The autor describes the exetracking experiment, the model of fixations and saccedes detection, as well as the selected examples of eye-tracking research conducted among patients with neurodegenerative diseases.

4

The fractional Fourier transform as a biomedical signal and image processing tool: A review

84%

Gómez-Echavarría A. , Ugarte J. P. , Tobón C.

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tom Vol. 40, no. 3

1081--1093

EN

This work presents a literature review of the fractional Fourier transform (FrFT) investiga-tions and applications in the biomedical field. The FrFT is a time-frequency analysis tool that has been used for signal and image processing due to its capability in capturing the nonstationary characteristics of real signals. Most biomedical signals are an example of such non-stationarity. Thus, the FrFT-based solutions can be formulated, aiming to enhance the health technology. As the literature review indicates, common applications of the FrFT involves signal detection, filtering and features extraction. Establishing adequate solutions for these tasks requires a proper fractional order estimation and implementing the suitable numeric approach for the discrete FrFT calculation. Since most of the reports barely describe the methodology on this regard, it is important that future works include detailed information about the implementation criteria of the FrFT. Although the applications in biomedical sciences are not yet among the most frequent FrFT fields of action, the growing interest of the scientific community in the FrFT, supports its practical usefulness for developing new biomedical tools.

5

Model of CTG aparatus in LabVIEW environment

67%

Gumkowski P. , Lecewicz W. , Surtel W.

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

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2016

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tom nr 3

75--78

EN

Cardiotocography is now a standard procedure determining the well-being of the fetus. In today's increasing popularity of IoT, there is a need for solutions providing mobility, while maintaining reliability. The article presents the methodology of creating CTG apparatus model, which enables filtration and detection of the basic parameters of the examination.

PL

Kardiotokografia jest obecnie standardowym badaniem określającym dobrostan płodu. W dobie coraz większej popularności IoT potrzeba rozwiązań zapewniających mobilność, przy jednoczesnym zachowaniu niezawodności. Artykuł przedstawia metodykę tworzenia modelu aparatu KTG, który umożliwia filtrację, oraz detekcję podstawowych parametrów badania.