Contactless Mapping of Thoracic and Abdominal Movements: Applications for Seismocardiography

Shirkovskiy, Pavel; Laurin, Alexandre; Chapelle, Dominique; Fink, Mathias; Ing, Ros Kiri

doi:10.22489/cinc.2017.024-311

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…By using two juxtaposed accelerometers, the motion artefact could be eliminated from the simultaneous accelerometric signals, with resultant RR in accordance with the results derived by visual counting and spirometry on normal subjects and scoliotic and obese patients under resting and exercising situations (Lapi et al 2014). Therefore, the accelerometer has been applied to provide a reference RR value (Liu et al 2016, Shirkovskiy et al 2017 or reference signal for eliminating motion artefacts in some pilot studies of RR estimation (Sun and Thakor 2016). The accelerometer-derived respiratory signal or RR value could be combined with those derived by other methods such as ECG (Liu et al 2013), PPG (Shen et al 2017), camera (Hernandez et al 2014) and pyro-electric infrared (PIR) sensor (Erden et al 2015).…”

Section: Accelerometers and Gyroscopessupporting

confidence: 53%

Recent development of respiratory rate measurement technologies

et al. 2019

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Respiratory rate (RR) is an important physiological parameter whose abnormality has been regarded as an important indicator of serious illness. In order to make RR monitoring simple to perform, reliable and accurate, many different methods have been proposed for such automatic monitoring. According to the theory of respiratory rate extraction, methods are categorized into three modalities: extracting RR from other physiological signals, RR measurement based on respiratory movements, and RR measurement based on airflow. The merits and limitations of each method are highlighted and discussed. In addition, current works are summarized to suggest key directions for the development of future RR monitoring methodologies.

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Section: Accelerometers and Gyroscopessupporting

confidence: 53%

Recent development of respiratory rate measurement technologies

et al. 2019

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“…One primary limitation of the noncontact sensing methods discussed in the literature is that they are mostly confined to single point measurement. Recently, in [39] a system namely ICARE (Cardio Respiratory Imager) was developed, which allows us to study the complete thoracic and abdominal systems simultaneously. ICARE can detect surface motion of any region of interest.…”

Section: Noncontact-based Acquisition From Multipointmentioning

confidence: 99%

A Comprehensive Review on Seismocardiogram: Current Advancements on Acquisition, Annotation, and Applications

et al. 2021

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In recent years, cardiovascular diseases are on the rise, and they entail enormous health burdens on global economies. Cardiac vibrations yield a wide and rich spectrum of essential information regarding the functioning of the heart, and thus it is necessary to take advantage of this data to better monitor cardiac health by way of prevention in early stages. Specifically, seismocardiography (SCG) is a noninvasive technique that can record cardiac vibrations by using new cutting-edge devices as accelerometers. Therefore, providing new and reliable data regarding advancements in the field of SCG, i.e., new devices and tools, is necessary to outperform the current understanding of the State-of-the-Art (SoTA). This paper reviews the SoTA on SCG and concentrates on three critical aspects of the SCG approach, i.e., on the acquisition, annotation, and its current applications. Moreover, this comprehensive overview also presents a detailed summary of recent advancements in SCG, such as the adoption of new techniques based on the artificial intelligence field, e.g., machine learning, deep learning, artificial neural networks, and fuzzy logic. Finally, a discussion on the open issues and future investigations regarding the topic is included.

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“…Acoustic echo-Doppler is a well-known method for the measurement of velocity of a moving object and can be used to measure vibrations with very small amplitudes as well [1]. Recently, some work appeared in the literature on the recording of chest movement induced by the beating heart using continuous wave Doppler (CWD) [2] and by pulsed wave Doppler (PWD) [3,4] as well.…”

Section: Introductionmentioning

confidence: 99%

Heart Sounds Obtained With Non-Contact Continuous-Wave Echo Doppler

Struijk¹,

Eiriksdottir²,

Palsdottir³

et al. 2018

2018 Computing in Cardiology Conference (CinC)

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Heart sounds can be obtained in various ways. A recent modality is airborne ultrasound echo Doppler, which has been used either in a pulsed wave mode or a continuous wave mode. In the present work we analyse the continuous wave ultrasound echo from the chest. In 10 subjects a piezo ultrasound transceiver was used to transmit a 40 kHz acoustic sine wave directed to the chest wall. The reflected signal (echo) was recorded with a microphone and sampled at 1 MHz. The FM modulated echo was demodulated in MatLab using a quadrature signal. The signal thus obtained represented the chest displacement, which was subdivided into three frequency bands: respiration (below 0.5 Hz), movement of the myocardium (>1 Hz) and valve sounds (30-100 Hz). Above 100 Hz the signal decayed by 20 dB/decade with a noise floor above 1-2 kHz. Interestingly, signals obtained directly from the skin and signals obtained through a thin layer of clothes were similar. Non-contact continuous-wave echo Doppler thus is a promising new modality for the recording of heart sounds, although its true potential has to be further investigated.

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Contactless Mapping of Thoracic and Abdominal Movements: Applications for Seismocardiography

Cited by 3 publications

References 12 publications

Recent development of respiratory rate measurement technologies

Recent development of respiratory rate measurement technologies

A Comprehensive Review on Seismocardiogram: Current Advancements on Acquisition, Annotation, and Applications

Heart Sounds Obtained With Non-Contact Continuous-Wave Echo Doppler

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