Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme.
The cardiovascular health of the human population is a major concern for medical clinicians, with cardiovascular diseases responsible for 48% of all deaths worldwide, according to the World Health Organization. The development of new diagnostic tools that are practicable and economical to scrutinize the cardiovascular health of humans is a major driver for clinicians. We offer a new technique to obtain seismocardiographic signals up to 54 Hz covering both ballistocardiography (below 20 Hz) and audible heart sounds (20 Hz upward), using a system based on curvature sensors formed from fiber optic long period gratings. This system can visualize the real-time three-dimensional (3-D) mechanical motion of the heart by using the data from the sensing array in conjunction with a bespoke 3-D shape reconstruction algorithm. Visualization is demonstrated by adhering three to four sensors on the outside of the thorax and in close proximity to the apex of the heart; the sensing scheme revealed a complex motion of the heart wall next to the apex region of the heart. The detection scheme is low-cost, portable, easily operated and has the potential for ambulatory applications.
Aston University, Aston Institute of Photonic Technologies, School of Engineering and Applied Science, Aston Triangle, Birmingham B4 7ET, United Kingdom.
Thomas
T
Allsop
Moog Insensys Ltd., Ocean House, Whittle Avenue, Segensworth West, Fareham PO15 5SX, United Kingdom.
Glynn
G
Lloyd
University of Manchester, Centre for Endocrinology and Diabetes, Institute of Human Development, Faculty of Medical and Human Sciences, AV Hill Building, Oxford Road, Manchester, United KingdomdCentre for Advanced Discovery and Experimental Therapeutics (
Ranjeet S
RS
Bhamber
Vinca Institute of Nuclear Sciences, Atomic Physics Department, P.O. Box 522, 11001 Belgrade, Republic of Serbia.
Ljupco
L
Hadzievski
Cytec Process Materials (Keighley) Ltd., 500 Bradford Road, Keighley West, Yorkshire BD20 5NG, United Kingdom.
Michael
M
Halliday
Aston University, Aston Institute of Photonic Technologies, School of Engineering and Applied Science, Aston Triangle, Birmingham B4 7ET, United Kingdom.
David J
DJ
Webb
Aston University, Aston Institute of Photonic Technologies, School of Engineering and Applied Science, Aston Triangle, Birmingham B4 7ET, United Kingdom.
Ian
I
Bennion
D000328:Adult; D000465:Algorithms; D005336:Fiber Optic Technology / Q000295:instrumentation* / Q000379:methods; D006321:Heart / Q000502:physiology; D006334:Heart Function Tests / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D009068:Movement / Q000502:physiology; D012815:Signal Processing, Computer-Assisted; D013909:Thorax / Q000502:physiology