A comparison of probes based on Bragg grating sensor and microphones for heart sounds measurement

Martínek, Radek; Brablík, Jindřich; Soustek, Lukas; Kolařík, Jakub; Fajkus, Marcel; Nedoma, Jan; Kahánková, Radana

doi:10.1117/12.2325744

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The Human Machine Interface (HMI) is not part of the selected cRIO model, so a PC, which is connected to the cRIO via an Ethernet interface, is also included in the control unit. The SCG signal is sensed using a GRAS 40PP microphone [65]- [67] with a frequency range from 10 Hz to 20 kHz and a sensitivity of 50 mW/Pa. The cRIO used has four slots for connecting input/output modules.…”

Section: Description Of the Measuring And Triggering System Hw Anmentioning

confidence: 99%

A Low-Cost System for Seismocardiography-Based Cardiac Triggering: A Practical Solution for Cardiovascular Magnetic Resonance Imaging at 3 Tesla

et al. 2019

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This study describes a pilot clinical validation of a new low-cost system for the continuous monitoring of the human body's cardiorespiratory activities within the magnetic resonance examination area. This study primarily focuses on monitoring cardiac activity and the related cardiac triggering. The patented system tested by the authors is based on seismocardiography (SCG). The study was conducted on 18 subjects on a Siemens Prisma 3T MR scanner. Standard anatomical and diffusion sequences were used to test cardiac activity monitoring. A wide range of commonly used diagnostic sequences were used to test imaging of the heart by means of cardiac triggering. System functionality was verified against a commercially available electrocardiography (ECG) system. Monitoring of cardiac activity (detection of the R-R interval in ECG and the AO-AO interval in SCG) was objectively evaluated by determining the overall probability of correct detection (ACC), sensitivity (SE), positive predictive value (PPV), and harmonic mean between SE and PPV, i.e. F1. Imaging quality control using Cardiac Triggering was performed by subjective evaluation of images by the physicians. The study conducted clearly confirmed the functionality of the system in terms of continuous cardiac activity monitoring. In all 18 subjects, a mean PPV > 99 % was achieved; F1 > 99 %; SE > 99 %; ACC > 98 %; 1.96σ < 3.5 bpm. Also, Cardiac Triggering functionality was confirmed by the physicians on the basis of analyzing cardiac images using the T1/T2 balanced echo sequences and the T1 flash sequence measured natively. INDEX TERMS Seismocardiography-based cardiac triggering, seismocardiography (SCG), siemens prisma 3T, monitor patient vital signs during MRI, cardiac magnetic resonance imaging (CMRI).

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Section: Description Of the Measuring And Triggering System Hw Anmentioning

confidence: 99%

A Low-Cost System for Seismocardiography-Based Cardiac Triggering: A Practical Solution for Cardiovascular Magnetic Resonance Imaging at 3 Tesla

et al. 2019

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“…If the AC power supply is alternating, it supplies AC power, and the AC/DC converter is used. However, AC sources are less frequent than DCs, so the use of AC/DC converters is not very common [4].…”

Section: Energy-harvesting Systemmentioning

confidence: 99%

Advanced Energy Harvesting from Heating for a Water Consumption Meter

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Sotola

Petras

et al. 2020

The 9th Innovations-Sustainability-Modernity-Openness Conference (ISMO’20)

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This study focused on the design of the power supply and the overall control structure of the electronic system, which is charged only with energy from the environment. It describes the basic finding of all the necessary information for the design and implementation with the measurement and evaluation of characteristic parameters. The paper describes the individual possibilities of obtaining energy from the surroundings with the selected energy from the heat of the pipeline. There are also various arrangements of possible elements mentioned in order to ensure the optimal solution of the whole system. Furthermore, a basic evaluation of the comparison of a possible workable solution is made.

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Comparison of SCG and ECG Based Cardiac Activity Monitoring in Laboratory Conditions

et al. 2019

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A comparison of probes based on Bragg grating sensor and microphones for heart sounds measurement

Cited by 4 publications

References 7 publications

A Low-Cost System for Seismocardiography-Based Cardiac Triggering: A Practical Solution for Cardiovascular Magnetic Resonance Imaging at 3 Tesla

A Low-Cost System for Seismocardiography-Based Cardiac Triggering: A Practical Solution for Cardiovascular Magnetic Resonance Imaging at 3 Tesla

Advanced Energy Harvesting from Heating for a Water Consumption Meter

Comparison of SCG and ECG Based Cardiac Activity Monitoring in Laboratory Conditions

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