Influence of Electrode Placement on Signal Quality for Ambulatory Pregnancy Monitoring

Rooijakkers, Michiel; Song, Shunfeng; Rabotti, C.; Oei, S.G.; Bergmans, J.W.M.; Cantatore, Eugenio; Mischi, Massimo

doi:10.1155/2014/960980

Cited by 70 publications

(61 citation statements)

References 37 publications

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“…Next, the fetal VCG is extracted from the obtained eight-channel fetal ECG using a fixed matrix transformation as described in [35]. All fetal QRS-complexes in the fetal VCG are detected using the Rpeak detection algorithm presented by Rooijakkers et al [36].…”

Section: Preprocessingmentioning

confidence: 99%

Feasibility Study of a New Method for Low-Complexity Fetal Movement Detection From Abdominal ECG Recordings

Rooijakkers

Rabotti

Lau

et al. 2016

IEEE J. Biomed. Health Inform.

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Fetal movement counting can provide valuable information on the fetal health, as a strong decrease in the number of movements can be seen as a precursor to fetal death. Typically, assessment of fetal health by fetal movement counting relies on the maternal perception of fetal activity. The percentage of detected movements is strongly subject dependent and with undivided attention of the mother varies between 37% and 88%. Various methods to assist in fetal movement detection exist based on a wide spectrum of measurement techniques. However, these are unsuitable for ambulatory or long-term observation. In this paper, a novel low-complexity method for fetal movement detection is presented based on amplitude and shape changes in the abdominally recorded fetal ECG. This method was compared to a state-of-the-art method from the literature. Using ultrasound-based movement annotations as ground truth, the presented method outperforms the state-of-the-art abdominal-ECG based method, with a sensitivity, specificity, and accuracy of 56%, 68%, and 63%, respectively. Additionally, a significant reduction in algorithm complexity is achieved, possibly enabling continuous ambulatory fetal movement detection and early detection of reduced fetal motility.

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Section: Preprocessingmentioning

confidence: 99%

Feasibility Study of a New Method for Low-Complexity Fetal Movement Detection From Abdominal ECG Recordings

Rooijakkers

Rabotti

Lau

et al. 2016

IEEE J. Biomed. Health Inform.

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“…This amplitude strongly depends on gestational age, inter-electrode distance, and measurement orientation [3]. Fig.1 shows an example of the influence of the measurement direction on the SNR of an abdominal fECG.…”

Section: A Fecg Signal and Interference Sourcesmentioning

confidence: 99%

“…determination of the fetal hart rate) is fixed [3]. Therefore a noise-reconfigurable frontend amplifier covering the required range of input-referred-noise levels with good noise efficiency factor (NEF) would offer better energy efficiency in the actual use than a point solution specified for worst-case SNR [4].…”

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confidence: 99%

A Noise Reconfigurable Current-Reuse Resistive Feedback Amplifier with Signal Dependent Power Consumption for Fetal ECG Monitoring

et al. 2016

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• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Song, S., Rooijakkers, M. J., Harpe, P., Rabotti, C., Mischi, M., Van Roermund, A. H. M., & Cantatore, E. (2016). A noise reconfigurable current-reuse resistive feedback amplifier with signal-dependent power consumption for fetal ECG monitoring. IEEE Sensors Journal, 16(23),[8304][8305][8306][8307][8308][8309][8310][8311][8312][8313]. DOI: 10.1109/JSEN.2016 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-This paper presents a noise-reconfigurable resistive feedback amplifier with current-reuse technique for fetal ECG monitoring. The proposed amplifier allows for both tuning of the noise level and changing the power consumption according to the signal properties, minimizing the total power consumption while satisfying all application requirements. The amplifier together with its amplitude detector and dynamical biasing circuit are implemented in a standard 0.18µm CMOS process. Measurements demonstrate that the proposed current-reuse resistive feedback topology improves the power efficiency of the conventional resistive feedback amplifier, achieving at the same time a good noise efficiency factor (NEF=2.8) and an input impedance of 20MOhm. The amplitude detector and dynamical biasing circuit, which tunes the current in the amplifier according to the signal amplitude, save up to 40% of the total power consumption. The amplifier achieves a measured noise level of 0.34µVrms in a 0.6 to 175Hz band, consuming 6.3µW power.

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“…The PCB was designed to meet the sensor distribution requirements [12]. Its substrate (DuPont Kapton polyimide film) is flexible only in one direction, which makes it difficult to adapt a squared PCB to the round pregnant belly shape.…”

Section: Printed Circuit Boardmentioning

confidence: 99%

“…Solid-gel sticky elec-trodes are chosen to have a good electrode-skin contact, and thus, reduce motion artifacts. They will be optimally arranged [12] for measurement of FECG and EHG during the last weeks of pregnancy. With this, the system aims to have an increased robustness against signal loss due to constant changes in the fetal position.…”

mentioning

confidence: 99%

Garment Design for an Ambulatory Pregnancy Monitoring System

Perusquía-Hernández

Chen

Feijs

2014

Ambient Assisted Living and Daily Activities

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Influence of Electrode Placement on Signal Quality for Ambulatory Pregnancy Monitoring

Cited by 70 publications

References 37 publications

Feasibility Study of a New Method for Low-Complexity Fetal Movement Detection From Abdominal ECG Recordings

Feasibility Study of a New Method for Low-Complexity Fetal Movement Detection From Abdominal ECG Recordings

A Noise Reconfigurable Current-Reuse Resistive Feedback Amplifier with Signal Dependent Power Consumption for Fetal ECG Monitoring

Garment Design for an Ambulatory Pregnancy Monitoring System

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