Comparative analysis of clutter filtering techniques on freehand micro-Doppler ultrasound imaging

Micro-Doppler (µDoppler) ultrasound imaging is a high frame rate ultrasound imaging modality that provides high spatiotemporal resolution ultrasound images of blood flow. It is sensitive to slow blood flow and particularly suitable for capturing fast-changing phenomena like rapid blood flow. Clutter filtering is an essential step in µDoppler...

Indoor Positioning and Fall Detection System Without Wearables: <redacted>

This thesis report, one of a set of two reports, describes a novel way to detect incidents that could occur in the daily life of the elderly. Unlike most systems already implemented in this field, this system does not use any wearable (positioning) sensors and works off an Single Board Computer (SBC).Independent of both of these systems is a...

Assessment Of The Spike Detection Performance Of The Wired-OR Readout Architecture

Abstract—This paper investigates the performance of commonly used spike detection algorithms (Absolute Amplitude Thresholding and Non-linear Energy Operator) on compressed neural signals using a novel wired-OR lossy compression algorithm. Performing compression with the wired-OR architecture mainly removes the noisy baseline and preserves spikes...

Two-photon polymerization-based 3D-multi-electrode arrays for electrical monitoring of neuronal cells

3D-multi-electrode arrays (3D-MEAs) are needed to overcome the limitations of 2D-multi-electrode arrays (2D-MEAs) and enable the electrical characterization of 3D neuronal cultures in in vitro brain models, advancing the understanding of neurological disorders and paving the way to personalized medicine. The aim of this thesis was to overcome...

Measuring ionic concentrations in sweat: using cyclic voltammetry

This report presents a proof-of-concept for a sensor measuring the ionic concentrations in sweat using cyclic voltammetry. Development is focused on feasibility of the sensor. Theoretical evaluations of voltammetry as a working principle and its physical and electrochemical foundations are guiding principles of the design. The sensor is then...

A 10-mV-Startup-Voltage Thermoelectric Energy Harvesting System Based on a Piezoelectric Cold Starter

Traditional power batteries have been unable to meet the requirements of wireless sensor network (WSN) applications which require battery lifetime and no battery replacement. So, harvesting ambient energy and converting it into electrical energy to power wireless sensors has become an alternative to the traditional power sources. Harvesting...

Microelectronic design of a pseudo voltage clamp for a 0.18um CMOS-based mesoscale neural interface for intracellular in-vitro recording and stimulation

The need to understand how the brain works has sparked interest in electrode arrays to record neural signals. Intracellular recordings with nanoelectrodes that penetrate the cell allow better signal quality and additional functions such as voltage clamping to set the neuron's transmembrane voltage. The voltage clamp aims to facilitate the...

Non-Invasive Screening for Elevated Skin Temperature and Respiratory Rate related to COVID-19 using Thermal Imaging

Non-contact infrared thermal imaging provides a non-invasive, safe and accurate means for screening subjects. COVID-19 (a disease caused by the Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2)) has changed how health care workers (HCW) interact with patients. Despite the usage of personal protective equipment (PPE), social...

On-chip Switched-Capacitor DC-DC converter for CMUT Biasing

Capacitive micromachined ultrasonic transducer (CMUT) technology has been considered as a promising alternative for the conventional piezo electric-based technology in ultrasound imaging systems. Its potential advantages include better image quality, higher operational frequency, and ease of fabrication and<br/>integration with CMOS read-out...

A Charge Controlled Switched-Voltage Mode Neurostimulator: For effective, safe and efficient multi-channel intracortical visual stimulation

Development of a visual prosthesis has the potential to help millions of patients with visual impairment around the world. One approach of visual prostheses is intracortical stimulation, where electrodes penetrating the visual cortex are used to create small light dots in the patients visual field. Said therapy requires an implantable...

A combined time-gain compensation low-noise amplifier for ultrasound imaging applications

This work presents a type of low noise amplifiers (LNA) that are used for ultrasound imaging systems. To account for the attenuating nature of ultrasound echo signals, a so-called time gain compensation (TGC) circuit is required. By increasing the gain over time, the output dynamic range is decreased, while the switching artifacts are suppressed...

Design of a novel multi-modal stimulation device for the treatment of tinnitus

Approximately 15-20% of theworld population is aected by tinnitus, a hearing condition associated with phantomsound perception. A large number of suerers experience a severe level of tinnitus and they are not ableto conduct a normal life because they develop insomnia, depression, and distress.Extensive research has been made to study its...

Cryogenic DAC for the Biasing of Spin Qubits

Disruptive changes in the fields ofcryptography and quantum chemistry can be achieved through quantum computing,as specific computations can be sped up significantly. Thousands to millions ofqubits are required to perform these computations, illustrating the need forlarge quantum computers. These qubits must be cooled to...

Design of A Readout System for a Low Leakage Soil Water-Content Sensor

Soil water-content sensors based on the measurement of soil impedance are widely used for the detection of rain-fall induced slope failure and other agriculture applications. In principle, low-leakage sensors can measure soil water content down to 4%, but they require readout systems capable of generating soil excitation signals at frequencies...

Electrical Impedance Tomography applications for the preterm neonate

Data analysis for electrical impedance tomography (EIT) research requires manual selection of sequences with a normal breathing pattern. This procedure is lengthy and the lack of a standardised approach results in different practices among EIT studies, limiting the potential and comparability of the research.<br/>This article presents a new...