Title :
Time-lapse imaging of human heartbeats using UWB radar
Author :
Brovoll, Sverre ; Berger, Theodore ; Paichard, Yoann ; Aardal, Oyvind ; Lande, Tor Sverre ; Hamran, Svein-Erik
Author_Institution :
Norwegian Defence Res. Establ. (FFI), Kjeller, Norway
fDate :
Oct. 31 2013-Nov. 2 2013
Abstract :
Radar systems for detection of human heartbeats have mostly been single-channel systems with limited spatial resolution. In this paper, a radar for ultra-wideband (UWB) imaging of dynamic reflectors inside the human body is presented. To make the radar waves penetrate the human tissue a body-contact antenna is used. The antenna is an array with eight elements, and an antenna switch system connects the radar to the individual elements in sequence to form an image. Successive images are used to build up a time-lapse movie of the beating heart with a frame rate of 25 Hz. Measurements on a human test subject are presented and heartbeat waveforms are extracted at specific locations inside the body. The experiments indicate sufficient resolution for observation of different moving parts of the heart and may provide basis for live diagnosis.
Keywords :
biological tissues; biomedical imaging; cardiovascular system; diseases; ultra wideband radar; UWB radar systems; antenna switch system; body-contact antenna; dynamic reflectors; frequency 25 Hz; heartbeat waveforms; human body; human heartbeat detection; human tissue; patient diagnosis; radar waves; time-lapse imaging; time-lapse movie; ultra-wideband imaging; Antenna measurements; Arrays; Heart; Imaging; Radar antennas; Radar imaging;
Conference_Titel :
Biomedical Circuits and Systems Conference (BioCAS), 2013 IEEE
Conference_Location :
Rotterdam
DOI :
10.1109/BioCAS.2013.6679659
