Heart:valve Sounds Obtained with a Laser Doppler Vibrometer

Struijk, Johannes; Munck, Kim; Hansen, Bolette Dybkjær; Jacobsen, Nina; Pilgaard, Louise Pedersen; Sørensen, Kasper; Schmidt, Samuel

doi:10.22489/cinc.2016.059-456

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…A heart sound is best appreciated with a stethoscope close to its point of origin, however vibrations produced inside the heart, particularly those of low frequency, can still propagate peripherally through the arteries from where they could be measured. Most of the existing methods of remote detection of those sounds based on radar [ 15 ] or visible light [ 16 – 19 ] acquire only the lowest frequency vibrations, thus providing information only about the heart rate. [ 15 – 19 ].…”

Section: Introductionmentioning

confidence: 99%

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Cester

Starshynov

Jones

et al. 2022

Biomed. Opt. Express

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Assessment of heart sounds is the cornerstone of cardiac examination, but it requires a stethoscope, skills and experience, and a direct contact with the patient. We developed a contactless, machine-learning assisted method for heart-sound identification and quantification based on the remote measurement of the reflected laser speckle from the neck skin surface in healthy individuals. We compare the performance of this method to standard digital stethoscope recordings on an example task of heart-beat sound biometric identification. We show that our method outperforms the stethoscope even allowing identification on the test data taken on different days. This method might allow development of devices for remote monitoring of cardiovascular health in different settings.

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Section: Introductionmentioning

confidence: 99%

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Cester

Starshynov

Jones

et al. 2022

Biomed. Opt. Express

View full text Add to dashboard Cite

show abstract

“…A heart sound is best appreciated with a stethoscope close to its point of origin, however vibrations produced inside the heart, particularly those of low frequency, can still propagate peripherally through the arteries from where they could be measured. Most of the existing methods of remote detection of those sounds based on radar [15] or visible light [16][17][18][19] acquire only the lowest frequency vibrations, thus providing information only about the heart rate. [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the existing methods of remote detection of those sounds based on radar [15] or visible light [16][17][18][19] acquire only the lowest frequency vibrations, thus providing information only about the heart rate. [15][16][17][18][19]. On the other hand, Zalevsky et al and Bianchi et al have proposed two different methods for acquisition of sound from the * Daniele.Faccio@glasgow.ac.uk mechanical movement of objects with visible light capable of capturing sounds in 0-1.2 kHz [20] and 0-5 kHz [21,22] frequency range.…”

Section: Introductionmentioning

confidence: 99%

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Cester¹,

Starshynov²,

Jones³

et al. 2022

Preprint

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“…Studies have proposed different techniques for multisite vibration maps. These techniques involve microphones [3], Laser Doppler Vibrometer [4], ultrasound waves [5], and accelerometers [6]. A common goal of these techniques is to quantify cardio-mechanic events in a simple and reproducible way.…”

Section: Introductionmentioning

confidence: 99%

Visualization of the Multichannel Seismocardiogram

Munck¹,

Sørensen²,

Struijk³

et al. 2019

2019 Computing in Cardiology Conference (CinC)

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The multichannel seismocardiography (mchSCG) project aims to develop the technology and knowledge-base to understand the distribution of vibration waves on the chest wall caused by cardio-mechanic events. This study focuses on the developing visualization methods for the vibration waves based on the multi-dimensional map obtained with the mchSCG equipment. We investigated four visualization methods. Vibration signals were collected in a four by four grid with 16 three-axis accelerometers placed on the chest of 11 healthy males. The visualization methods were investigated for their abilities to show temporal, spatial, and directional information. Of the four methods the SCG chart shows best temporal and small amplitude sensitivity information. Color plots provides an improved spatial overview. Tracking maps provide good directionality. The seismic mesh method is good at showing spatial and directionality information. Dependent on which signal aspects are of interest, the four visualization methods have their specific suited purposes. These visualization methods can assist further investigation of the vibration waves behavior and its relation to cardio-mechanic events.

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Heart:valve Sounds Obtained with a Laser Doppler Vibrometer

Abstract: The present work investigates the use of a Laser Doppler Vibrometer (LDV)

Cited by 3 publications

References 5 publications

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Remote laser-speckle sensing of heart sounds for health assessment and biometric identification

Visualization of the Multichannel Seismocardiogram

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