![]() Subsequently, the modelling accuracy of non-contact vital sign (NCVS) systems depends on the modelling of chest wall motion with respect to time, i.e., the shape of the chest wall motion. Chest wall displacement with respect to time is reflected in the phase variation in the received signals. The radar-based system for vital sign detection is developed based on movements of a target, i.e., chest wall motion due to respiration and cardiac activity. From existing studies, it is observed that chest wall motion is associated with tumor movements therefore, it can help in predicting the tumor position. The main issue in radiotherapy is that a lung tumor may move due to respiration. Another application of modelling chest wall motion due to respiratory signals is to study the radiotherapy for treating a lung-tumor. The monitoring of surface chest wall motion can provide vital signs information which can be useful in many applications e.g., designing a radar-based non-contact vital sign system for long term home health care and sleep monitoring. ![]() One of the alternative solutions for long term continuous monitoring is using radar-based sensors. ![]() It is not practical to use wearable sensors 24/7 throughout the year. The continuous monitoring can be achieved either through contact (wearable) sensors or non-contact (radar) sensors. Continuous monitoring of vital signs, namely respiration and heartbeat, can provide information in predicting the undesired events like cardiac arrest, critical dizziness, arrhythmias, cardiac rhythm, temperature regulation, synchronization with respiration rate. ![]()
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