Ballistocardiography.

Deuchar, D C

doi:10.1136/hrt.29.3.285

Cited by 23 publications

(10 citation statements)

References 19 publications

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“…These slow movements with an amplitude of about 0.1 mm do not seem to cause any significant artifacts. The motion caused by the cardiac cycle (i.e., the ballistocardiogram ) shows a similar amplitude but occurs with a much higher velocity. The artifacts caused by cardiac‐related motion can be seen in the third column in Figure .…”

Section: Resultsmentioning

confidence: 96%

Reproduction of motion artifacts for performance analysis of prospective motion correction in MRI

Herbst

Maclaren

Lovell-Smith

et al. 2013

Magnetic Resonance in Med

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Purpose Despite numerous publications describing the ability of prospective motion correction (PMC) to improve image quality in MRI of the brain, a reliable approach to assess this improvement is still missing. This work develops a method that accurately reproduces motion artifacts correctable with PMC, and enables the quantification of the improvements achieved. Methods A software interface was developed to simulate rigid body motion by changing the scanning coordinate system relative to the object. Thus, tracking data recorded during a patient scan can be used to reproduce the prevented motion artifacts on a volunteer or a phantom. The influence of physiological motion on image quality was investigated by filtering these data. Finally, the method was used to reproduce and quantify the motion artifacts prevented in a patient scan. Results The accuracy of the method was tested in phantom experiments and in vivo. The calculated quality factor, as well as a visual inspection of the reproduced artifacts shows a good correspondence to the original. Conclusion Precise reproduction of motion artifacts assists qualification of prospective motion correction strategies. The presented method provides an important tool to investigate the effects of rigid body motion on a wide range of sequences, and to quantify the improvement in image quality through PMC.

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Section: Resultsmentioning

confidence: 96%

Reproduction of motion artifacts for performance analysis of prospective motion correction in MRI

Herbst

Maclaren

Lovell-Smith

et al. 2013

Magnetic Resonance in Med

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“…It collects a 1-lead ECG at 200 Hz (ADS1292R from AD Instruments) together with 3-degree-of-freedom (DOF) linear (LIN) accelerations and 3-DOF rotational (ROT) angular velocities from the sternum (SCG) and the lumbar region (BCG) (figure 1S of supplemental material). While the BCG measures overall body accelerations in response to the ejection of blood into the main vasculature during each cardiac cycle (Deuchar 1967), the SCG sensor mainly records local chest wall vibrations generated by beat-by-beat myocardial activity (Taebi et al 2019). In brief, a total of 12-DOF linear acceleration and angular velocity signals are recorded at 50 Hz.…”

Section: Kinocardiographymentioning

confidence: 99%

Modification of the mechanical cardiac performance during end-expiratory voluntary apnea recorded with ballistocardiography and seismocardiography

et al. 2019

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If an explicit acknowledgment of funding is required, please ensure that it is indicated in your article. If you already have an Acknowledgments section, please check that the information there is complete and correct. Page 11 AQ8 Please check the details for any journal references that do not have a link as they may contain some incorrect information. If any journal references do not have a link, please update with correct details and supply a Crossref DOI if available.

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“…The performance of the hardware is evaluated, and technical parameters such as frequency response are presented. Also, 1 EMFi is a registered trademark of Emfit Ltd. an overview of the architecture for the wireless system is given. Three major interference sources have been identified; movement of the patient, respiration, and electrical noise.…”

Section: Introductionmentioning

confidence: 99%

“…One such variable is the ballistocardiogram (BCG) [1]. BCG is a noninvasive technique for the assessment of the cardiac function.…”

Section: Introductionmentioning

confidence: 99%

An EMFi-film sensor based ballistocardiographic chair: performance and cycle extraction method

Junnila

Akhbardeh

Värri

et al.

IEEE Workshop on Signal Processing Systems Design and Implementation, 2005.

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New sensor technologies open possibilities for measuring traditional biosignals in new innovative ways. This, together with the development of signal processing systems and their computing power, can sometimes give new life to old measurement techniques. Ballistocardiogram is one such technique, originally promising but quickly replaced by the now very popular electrocardiogram. A ballistocardiograph chair, designed to look like a normal office chair, was built and fitted with pressure sensitive EMFi-films. The films are connected via a charge amplifier to a medical bioamplifier. The system was accepted for medical use in Tampere University Hospital and patient measurements have been performed. The system is presented and it's performance evaluated. A wireless version of the system is needed to hide the cabling from the user. This will make the chair indistinguishable from a normal office chair. Overview of first wireless prototype is given. To analyze recorded BCG, individual BCG cycles must be extracted from the signal containing respiration and movement artifacts. A method for this and results of it's application are presented. The developed system can be used for BCG measurements and it is able to automatically extract individual BCG cycles, but it has some limitations which are presented in the paper.

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Ballistocardiography.

Cited by 23 publications

References 19 publications

Reproduction of motion artifacts for performance analysis of prospective motion correction in MRI

Reproduction of motion artifacts for performance analysis of prospective motion correction in MRI

Modification of the mechanical cardiac performance during end-expiratory voluntary apnea recorded with ballistocardiography and seismocardiography

An EMFi-film sensor based ballistocardiographic chair: performance and cycle extraction method

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