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Automatic signal quality assessment of raw trans-abdominal biopotential recordings for non-invasive fetal electrocardiography.
Front Bioeng Biotechnol
February 2023
Department of Electrical and Electronic Engineering, University of Cagliari, Cagliari, Italy.
Wearable monitoring systems for non-invasive multi-channel fetal electrocardiography (fECG) can support fetal surveillance and diagnosis during pregnancy, thus enabling prompt treatment. In these embedded systems, power saving is the key to long-term monitoring. In this regard, the computational burden of signal processing methods implemented for the fECG extraction from the multi-channel trans-abdominal recordings plays a non-negligible role.
View Article and Find Full Text PDFTransformation of multichannel magnetocardiographic signals to standard grid form.
IEEE Trans Biomed Eng
January 1995
Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland.
Multichannel magnetocardiographic (MCG) recordings with fixed sensor arrays are not directly comparable with single-channel measurements carried out at standard grid locations. In addition, comparison of data obtained with different types of magnetometers is difficult. We present a method for transforming multichannel measurements to the standard-grid format.
View Article and Find Full Text PDFMagnetoencephalographic localization of epileptic cortex--impact on surgical treatment.
Ann Neurol
July 1992
Low Temperature Laboratory, Helsinki University of Technology, Otakaari, Espoo.
A 24-channel, planar, superconducting quantum interference device gradiometer, sampling a fourth of the head surface over brain tissue, was used to determine the site of an epileptic focus in a 36-year-old woman with intractable complex partial epilepsy. The other presurgical findings appeared divergent: a large arachnoid cyst over the right parietal convexity, dissimilar interictal electroencephalographic patterns, and several neuropsychological dysfunctions. The equivalent current sources of magnetoencephalographic spikes were in the right posterior temporal region of the cortex, 4 cm apart from the cyst.
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