2015 Computer methods in biomechanics and biomedical engineering
* Electrocardiogram signal quality assessment using an artificially reconstructed target lead.
- In real applications, even the most accurate electrocardiogram (ECG) analysis algorithm, based on research databases, might breakdown completely if a quality measurement technique is not applied precisely before the analysis. The major concentration of this study is to describe and develop a reliable ECG signal quality assessment technique. The proposed algorithm includes three major stages: preprocessing, energy-concavity index (ECI) analysis and a correlation-based examination subroutine. The preprocessing step includes the removal of baseline wanders and high-frequency disturbances. The quality measurement based on ECI includes two separate stages according to the energy and concavity of the ECG signal. The correlation-based quality measurement step is mainly established by using the correlation between ECG leads estimated by applying a suitably trained neural network. The operating characteristics of the proposed ECI are sensitivity (Se) of 77.04% with a positive predictive value (PPV) of 90.53% for detecting high-energy noise. The correlation-based technique achieved the best scores (Se = 100%; PPV = 98.92%) for detecting high-energy noise and for recognising any other kind of disturbances (Se = 92.36%; PPV = 94.77%). Although ECI analysis acts effectively against high-energy disturbances, very poor performance is obtained in cases where the energy of the disturbances is not considerable. However, the correlation-based method is able to find all kinds of disturbances. For officially evaluating the proposed algorithm, an entry was sent to the Computing-in-Cardiology Challenge 2011 on 27 February 2012; a final score (accuracy) of 93.60% was achieved.
Overview of verb base
The verb base has 3 senses (first 1 from tagged texts)
1. (75) establish, base, ground, found -- (use as a basis for; found on; "base a claim on some
2. base -- (situate as a center of operations; "we will base this project in the new lab")
3. free-base, base -- (use (purified cocaine) by burning it and inhaling the fumes)
Overview of adj based
The adj based has 2 senses (first 2 from tagged texts)
1. (3) based -- (having a base; "firmly based ice")
2. (1) based -- (having a base of operations (often used as a combining form); "a locally based
business"; "an Atlanta-based company"; "carrier-based planes")
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