Adaptive Neuro-Fuzzy Inference System for antepartum antenatal care using phonocardiography
23 May 2012-International Journal of Biomedical Engineering and Technology (Inderscience Publishers)-Vol. 8, Iss: 4, pp 357
TL;DR: Development of a model based on Adaptive Neuro-Fuzzy Inference System (ANFIS) for evaluation of fetal health status using phonocardiography and results have indicated that the ANFIS can be implemented effectively and provides high accuracy for antepartum antenatal care through phonOCardiography.
Abstract: This work discusses development of a model based on Adaptive Neuro-Fuzzy Inference System (ANFIS) for evaluation of fetal health status using phonocardiography. The model integrates adaptable fuzzy inputs with a modular neural network to deal with the imprecision and uncertainty in the interpretation of the FHR data from phonocardiographic signals. A zero-order Takagi-Sugeno model is chosen for designing ANFIS architecture. The diagnostic parameters e.g., Baseline FHR, Baseline Variability, Acceleration and Deceleration of the FHR are derived from the fPCG signals for training and testing of the model. The elicited fuzzy rules derived from clinical guidelines and other resources are implemented into the ANFIS expert model. The performance of the ANFIS model is evaluated in terms of sensitivity and overall accuracy. The results have indicated that the ANFIS can be implemented effectively and provides high accuracy for antepartum antenatal care through phonocardiography.
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TL;DR: The overall performance shows that the developed system has a long-term monitoring capability with very high performance to cost ratio and can be used as first screening tool by the medical practitioners.
37 citations
Cites methods from "Adaptive Neuro-Fuzzy Inference Syst..."
...This present application considers the ANFIS structure with the zero-order Sugeno model containing 80 rules [67]....
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03 Jul 2013
TL;DR: An effective approach for cardiac murmur detection based on adaptive neuro-fuzzy inference systems (ANFIS) over acoustic representations derived from Empirical Mode Decomposition (EMD) and Hilbert-Huang Transform (HHT) of 4-channel phonocardiograms (4-PCG).
Abstract: The heart's mechanical activity can be appraised by auscultation recordings, taken from the 4-Standard Auscultation Areas (4-SAA), one for each cardiac valve, as there are invisible murmurs when a single area is examined. This paper presents an effective approach for cardiac murmur detection based on adaptive neuro-fuzzy inference systems (ANFIS) over acoustic representations derived from Empirical Mode Decomposition (EMD) and Hilbert-Huang Transform (HHT) of 4-channel phonocardiograms (4-PCG). The 4-PCG database belongs to the National University of Colombia. Mel-Frequency Cepstral Coefficients (MFCC) and statistical moments of HHT were estimated on the combination of different intrinsic mode functions (IMFs). A fuzzy-rough feature selection (FRFS) was applied in order to reduce complexity. An ANFIS network was implemented on the feature space, randomly initialized, adjusted using heuristic rules and trained using a hybrid learning algorithm made up by least squares and gradient descent. Global classification for 4-SAA was around 98.9% with satisfactory sensitivity and specificity, using a 50-fold cross-validation procedure (70/30 split). The representation capability of the EMD technique applied to 4-PCG and the neuro-fuzzy inference of acoustic features offered a high performance to detect cardiac murmurs.
4 citations
Cites methods from "Adaptive Neuro-Fuzzy Inference Syst..."
...In [13], an ANFIS model for evaluation of foetal health status using PCG signals was implemented effectively and provided high accuracy for antepartum antenatal care....
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References
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TL;DR: In the proposed system, the weighted average is employed to estimate the fatal heartbeat baseline and uterine contraction baseline and fuzzy rules are used to recognize non-reassuring fatal status that triggers an alarm mechanism.
Abstract: Clinical fatal examination requires thorough and continuous monitoring. Obstetricians are required to check fatal monitoring signals for anomalies. Manual processing of ultrasonic data is time-consuming and labor-intensive. To overcome this problem, a fatal status monitoring system was designed to help obstetricians detect non-reassuring fatal status. In the proposed system, the weighted average is employed to estimate the fatal heartbeat baseline and uterine contraction baseline. These baseline values allow five patterns to be recognized including heartbeat acceleration, heartbeat deceleration, uterine contraction, heartbeat noise pattern, and uterine noise pattern. Moreover, the monitoring system considers four non-reassuring fatal status types. Fuzzy logic is used to analyze the signals for each non-reassuring status type. A total of 23 fuzzy rules are used to recognize non-reassuring fatal status that triggers an alarm mechanism. Non-reassuring conditions are detected and alarm signals are sent to obstetricians for immediate treatment of the patient. The fuzzy sets can be modified and adopted to fit the requirements of individual patients. A signal simulator is used to verify the applicability of the system.
4 citations