Ultra-wideband radar methods and techniques of medical sensing and imaging

Abstract

Ultra-wideband radar holds great promise for a variety of medical applications. We have demonstrated the feasibility of using ultra-wideband sensors for detection of internal injuries, monitoring of respiratory and cardiac functions, and continuous non-contact imaging of the human body. Sensors are low-power, portable, and do not require physical contact with the patient. They are ideal for use by emergency responders to make rapid diagnosis and triage decisions. In the hospital, vital signs monitoring and imaging application could improve patient outcomes. In this paper we present an overview of ultra-wideband radar technology, discuss key design tradeoffs, and give examples of ongoing research in applying ultra-wideband technology to the medical field.

Non Contact Heart Monitoring

“…For example, data from 40 human volunteers at Walter Reed Army Institute of Research were collected using a micro-power impulse radar range finding prototype (Paulson et al, 2005). Readings from an ECG and pulse oximeter were captured simultaneously with MIR readings (Azevedo, 1996).…”

Ultra-wideband antipodal vivaldi antenna array with Wilkinson power divider feeding network

“…With this array we target medical applications. Remote sensing of heartbeat, respiration rate, fall detection and subcutaneous bleedings [10] are potential applications. Previously we used the single Vivaldi antenna to measure changes in complex permittivity of tissue phantoms [11].…”

PCA-based artifact removal algorithm for stroke detection using UWB radar imaging

“…As a matter of fact, an UWB radar imaging has great potential for the implementation of a simple, transportable and low-cost device, which would have the further advantage of not requiring a training phase for classification purposes [17]. Main challenges are related to:…”