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Medical & Biological Engineering & Computing

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01-02-2013 | Original Article

Remote sensing of patterns of cardiac activity on an ambulatory subject using millimeter-wave interferometry and statistical methods

Authors: Ilya V. Mikhelson, Sasan Bakhtiari, Thomas W. Elmer II, Alan V. Sahakian

Published in: Medical & Biological Engineering & Computing | Issue 1-2/2013

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Abstract

Using a 94-GHz millimeter-wave interferometer, we are able to calculate the relative displacement of an object. When aimed at the chest of a human subject, we measure the minute motions of the chest due to cardiac activity. After processing the data using a wavelet multiresolution decomposition, we are able to obtain a signal with peaks at heartbeat temporal locations. In order for these heartbeat temporal locations to be accurate, the reflected signal must not be very noisy. Since there is noise in all but the most ideal conditions, we created a statistical algorithm in order to compensate for unconfident temporal locations as computed by the wavelet transform. By analyzing the statistics of the peak locations, we fill in missing heartbeat temporal locations and eliminate superfluous ones. Along with this, we adapt the processing procedure to the current signal, as opposed to using the same method for all signals. With this method, we are able to find the heart rate of ambulatory subjects without any physical contact.

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Akay M (1998) Time frequency and wavelets in biomedical signal processing. IEEE Press, Piscataway

Bakhtiari S, Elmer TW, Cox NM, Gopalsami N, Raptis AC, Liao S, Mikhelson I, Sahakian AV (2012) Compact millimeter-wave sensor for remote monitoring of vital signs. IEEE Trans Instrum Meas 61(3):830–841 doi:10.1109/TIM.2011.2171589 CrossRef

Droitcour AD (2006) Non-contact measurement of heart and respiration rates with a single-chip microwave doppler radar. PhD thesis, Stanford University

Geisheimer J, Greneker III EF (2001) A non-contact lie detector using radar vital signs monitor (RVSM) technology. IEEE Aerosp Electron Syst Mag 16(8):10–14CrossRef

Jianqi W, Chongxun Z, Guohua L, Xijing J (2007) A new method for identifying the life parameters via radar. EURASIP J Appl Signal Process 2007(1):16–16

Lin JC (1992) Microwave sensing of physiological movement and volume change: a review. Bioelectromagnetics 13(6):557–565PubMedCrossRef

Lubecke VM, Boric-Lubecke O, Host-Madsen A, Fathy AE (2007) Through-the-wall radar life detection and monitoring. In: Microwave Symposium. IEEE/MTT-S International, pp 769–772. IEEE

Lubecke OB, Ong PW, Lubecke VM (2002) 10 GHz Doppler radar sensing of respiration and heart movement. In: Bioengineering Conference, 2002. Proceedings of the IEEE 28th Annual Northeast, pp 55–56. IEEE

MATLAB: version 7.10.0 (2010) The MathWorks Inc., Natick, Massachusetts

10.

Mikhelson IV, Bakhtiari S, Elmer II TW, Sahakian AV (2011) Remote sensing of heart rate and patterns of respiration on a stationary subject using 94-GHz millimeter-wave interferometry. IEEE Trans Biomed Eng 58(6):1671–1677. doi:10.1109/TBME.2011.2111371 PubMedCrossRef

11.

Morgan DR, Zierdt MG (2009) Novel signal processing techniques for doppler radar cardiopulmonary sensing. Signal Process 89(1):45–66CrossRef

12.

Obeid D, Sadek S, Zaharia G, Zein GE (2009) Noncontact heartbeat detection at 2.4, 5.8, and 60 GHz: a comparative study. Microw Opt Technol Lett 51(3):666–669CrossRef

13.

Pan J, Tompkins WJ (1985) A real-time QRS detection algorithm. IEEE Trans Biomed Eng 3:230–236CrossRef

14.

Petkie DT, Benton C, Bryan E (2009) Millimeter wave radar for remote measurement of vital signs. In: Radar Conference, 2009 IEEE, pp 1–3. IEEE

15.

Poor HV (1994) An introduction to signal detection and estimation. Springer, Berlin

16.

Rioul, O, Vetterli, M (1991) Wavelets and signal processing. IEEE Signal Process Mag 8(4):14–38CrossRef

17.

Uenoyama M, Matsui T, Yamada K, Suzuki S, Takase B, Suzuki S, Ishihara M, Kawakami M (2006) Non-contact respiratory monitoring system using a ceiling-attached microwave antenna. Med Biol Eng Comput 44(9):835–840PubMedCrossRef

Title: Remote sensing of patterns of cardiac activity on an ambulatory subject using millimeter-wave interferometry and statistical methods
Authors: Ilya V. Mikhelson
Sasan Bakhtiari
Thomas W. Elmer II
Alan V. Sahakian
Publication date: 01-02-2013
Publisher: Springer-Verlag
Published in: Medical & Biological Engineering & Computing / Issue 1-2/2013
Print ISSN: 0140-0118
Electronic ISSN: 1741-0444
DOI: https://doi.org/10.1007/s11517-012-0977-6

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