Biomedical Engineering Laboratory

Developing research in physiological signal processing. Such is the case of the Sleep Research Group, which has a long relationship with the Sleep Laboratory of the Institute of Nutrition and Food Technology (INTA) of the University of Chile. The polysomnograms that have been performed for years on a cohort of children from 6 months of age at INTA serve as the basis for performing -in this laboratory- the detection and characterization of sleep states and stages, sleep patterns and other parameters. , automating and standardizing the description and extraction of features from records.

Important results have been obtained, applying signal analysis tools, computational intelligence and expert emulation. The developed systems and algorithms are integrated into a software tool, the Sleep Analyzer, which is currently one of the fundamental tools applied by the Sleep Laboratory in its research.

A more recent line of research is the detection and characterization of individual evoked potentials that are bioelectrical responses to stimuli in awake patients.

In other lines of research, using deformable meshes, 3D models of organs have been developed in ultrasound, SPECT and computed tomography images.

The influence of noise on sensory perceptions (vision and touch) is also investigated. In particular, through a phenomenon called stochastic resonance, it tries to explain how adding random noise to sub-threshold stimuli improves the perception of these stimuli.

Se han obtenido importantes resultados, aplicando herramientas de análisis de señales, inteligencia computacional y emulación de expertos. Los sistemas y algoritmos desarrollados se van integrando a una herramienta de software, el Sleep Analyzer, que actualmente es una de las herramientas fundamentales que aplica el Laboratorio de Sueño en sus investigaciones.

Una línea de investigación de más reciente data es la detección y caracterización de potenciales evocados individuales que son respuestas bioeléctricas a estímulos en pacientes en vigilia.

En otras líneas de investigación, utilizando mallas deformables, se han desarrollado modelos 3D de órganos en imágenes de ultrasonido, SPECT y tomografía computarizada.

También se investiga la influencia del ruido en las percepciones sensoriales (visión y tacto). En particular, a través de un fenómeno llamado resonancia estocástica, se trata de explicar cómo al agregar ruido aleatorio a estímulos sub-umbrales mejora la percepción de estos estímulos.

There are digital records of physiological signals, computers with signal processing tools, piezoelectric devices for tactile stimulation, and vibration measurement devices in the micrometer range.
  • FONDECYT 1120319.
  • FONDECYT 1110701.
  • FONDECYT 1120613.

Claudio Pérez

Responsible Academic

+56 2 2978 4207