Evaluation of an improved algorithm for fetal QRS detection

M. M Sheikh Algunaidi, M. A Mohd Ali, Md Fokhrul Islam

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    In the area of fetal heart rate (FHR) monitoring, different sizes and multifunctional ultrasound based systems are used. All these systems are invasive but cannot be use for long term monitoring applications. The objective of this paper is to evaluate a fetal peak detection algorithm which is applied to all the abdominal channels without threshold (amplitude threshold free) that is threshold independent detection. The proposed algorithm detects fetal R peaks from pregnant abdominal noninvasive records. Fetal signals were extracted using recursive least square (RLS) adaptive filter. Subsequently an enhancement technique based on maternal QRS (MQRS) window was applied to the residual signal, then the signal smoothed by attenuating other component around one Hz using IIR notch filter. MQRS peaks were adjusted in order to make it shorter than fetal QRS (FQRS) peaks. Therefore, peak position correction is also performed to correct false detections (overlapped peaks) using correction technique based on the window signal. Thirty recorded signals (each of 60 seconds) were acquired from pregnant women (from 36 to 38 weeks of gestation) in order to evaluate the proposed algorithm. A sensitivity of 79.8% and a positive prediction value of 77.5% were obtained. The error rate of the proposed algorithm is in the range of 0.7 to 4.9% compare with the ultrasound measurements.

    Original languageEnglish
    Pages (from-to)213-220
    Number of pages8
    JournalInternational Journal of Physical Sciences
    Volume6
    Issue number2
    Publication statusPublished - 18 Jan 2011

    Fingerprint

    evaluation
    Ultrasonics
    IIR filters
    Notch filters
    thresholds
    Monitoring
    Adaptive filters
    heart rate
    adaptive filters
    notches
    filters
    augmentation
    sensitivity
    predictions

    Keywords

    • FHR
    • MQRS window and threshold independent
    • RLS

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Electronic, Optical and Magnetic Materials

    Cite this

    Algunaidi, M. M. S., Ali, M. A. M., & Islam, M. F. (2011). Evaluation of an improved algorithm for fetal QRS detection. International Journal of Physical Sciences, 6(2), 213-220.

    Evaluation of an improved algorithm for fetal QRS detection. / Algunaidi, M. M Sheikh; Ali, M. A Mohd; Islam, Md Fokhrul.

    In: International Journal of Physical Sciences, Vol. 6, No. 2, 18.01.2011, p. 213-220.

    Research output: Contribution to journalArticle

    Algunaidi, MMS, Ali, MAM & Islam, MF 2011, 'Evaluation of an improved algorithm for fetal QRS detection', International Journal of Physical Sciences, vol. 6, no. 2, pp. 213-220.
    Algunaidi, M. M Sheikh ; Ali, M. A Mohd ; Islam, Md Fokhrul. / Evaluation of an improved algorithm for fetal QRS detection. In: International Journal of Physical Sciences. 2011 ; Vol. 6, No. 2. pp. 213-220.
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