ELECTRICAL AND ELECTRONIC MEASUREMENTS
Written test
The aim is to illustrate the characteristics and operating principles of electronic devices for the detection of signals and images in physiology and medicine.
General aspects related to measure theory and signal theory. Basic principles of the physics of electromagnetism, circuit theory and electrical safety. Features of electrical signal transmission in axons and nerves, electrocardiography, photoplethysmography, sphygmomanometers. Generation of body images with computed tomography.
Analog and Digital Measurement, Systematic and Random Errors, Induced Perturbations, Digitization, Quantization, Accuracy and Precision, Units of Measurement, Dimensional Calculation.
Physical and Analog Signal, Noise, Energy and Power, Fourier Series, Analog Filters. Sampling and Digital Signals, Aliasing, Fourier Transform and Power Spectrum
Coulomb's Law, Electric Field, Potential, Insulators and Conductors, Current, Magnetic Field. Relationship between Electricity and Magnetism, Electromagnetic Radiation, The LASER. Capacitor, Resistance, Battery, Absorbed Power. Circuit, Mesh, Node, Kirchhoff's Laws, Resistors in Series and Parallel; Ammeter and Voltmeter, RC circuits, Electrical Systems and Safety
Subthreshold axon electrical model, Microneurography, Electrodermal activity
Muscle and Cardiac Action Potential, ECG Trace, Electrodes and Leads, Frequency content, filtering, sampling frequency
Heart Rate Variability (in the domain of Time, Frequencies, and Complexity)
Hydrostatic and Hydrodynamic Pressure, Hydraulic Resistance, Pressure in a Cardiac Chamber, Vascular Compliance, Invasive measurement with extra- or intravascular Sensor, pressure waveform, Discontinuous non-invasive measurement: Riva-Rocci and Korotkov Sphygmomanometer, Oscillometric method.
Continuous non-invasive measurement: photoplethysmographic method. Hydrostatic Pressure as Measurement Error. Pulse Contour Analysis. Blood Pressure Variability (BPV) and Baroreflex Sensitivity (BRS)
Invasive Systems; Non-Invasive Systems: with Oscillometric Cuff; without Cuff based on Applanation Tonometry; on Pulse Wave Transit Time (PTT) and Pulse Wave Arrival Time (PAT); systems based on overlap between Incident and Reflected Wave
Lectures, homework and correction of assignments in class