Impact of Body Position on Imaging Ballistocardiographic Signals

Alexander Woyczyk, Sebastian Zaunseder, Sebastian Zaunseder

2023

Abstract

Current works direct at the unobtrusive acquisition of vital parameters from videos. The most common approach exploits subtle color variations. The analysis of cardiovascular induced motion from videos (imaging ballistocardiography, iBCG) is another approach that can supplement the analysis of color changes. The presented study systematically investigates the impact of body position (supine vs. upright) on iBCG. Our research directs at heart rate estimation by iBCG and on the possibility to analyse ballistocardiographic waveforms from iBCG. We use own data from 30 healthy volunteers, who went through repeated orthostatic maneuvers on a tilt table. Processing is done according to common procedures for iBCG processing including feature tracking, dimensionality reduction and bandpass filtering. Our results indicate that heart rate estimation works well in supine position (root mean square error of heart rate estimation 5.68 beats per minute). The performance drastically degrades in upright (standing) position (root mean square error of heart rate estimation 21.20 beats per minute). With respect to analysis of beat waveforms, we found large intra-subject and inter-subject variations. Only in few cases, the resulting waveform closely resembles the ideal ballistocardiographic waveform. Our investigation indicates that the actual position has a large effect on iBCG and should be considered in algorithmic developments and testing.

Paper Citation

in Harvard Style

Woyczyk A. and Zaunseder S. (2023). Impact of Body Position on Imaging Ballistocardiographic Signals. In Proceedings of the 16th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2023) - Volume 4: BIOSIGNALS; ISBN 978-989-758-631-6, SciTePress, pages 55-65. DOI: 10.5220/0011659900003414

in Bibtex Style

@conference{biosignals23,
author={Alexander Woyczyk and Sebastian Zaunseder},
title={Impact of Body Position on Imaging Ballistocardiographic Signals},
booktitle={Proceedings of the 16th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2023) - Volume 4: BIOSIGNALS},
year={2023},
pages={55-65},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011659900003414},
isbn={978-989-758-631-6},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 16th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2023) - Volume 4: BIOSIGNALS
TI - Impact of Body Position on Imaging Ballistocardiographic Signals
SN - 978-989-758-631-6
AU - Woyczyk A.
AU - Zaunseder S.
PY - 2023
SP - 55
EP - 65
DO - 10.5220/0011659900003414
PB - SciTePress