Reducing of gradient induced artifacts on the ECG signal during MRI examinations using Wilcoxon filter

Schmidt, Marcus; Krug, Johannes; Rose, Georg

doi:10.1515/cdbme-2016-0040

Cited by 10 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, future studies should also consider the effects of fast switching gradient magnetic fields used during MRI on the ECG signal. Like the MHD effect, fast switching gradient magnetic fields cause interfering signals that are superimposed on the ECG signal [31,32]. Thus, many techniques have been developed to reduce the effects of these signals.…”

Section: Discussionmentioning

confidence: 99%

ECG Electrode Placements for Magnetohydrodynamic Voltage Suppression

2018

View full text Add to dashboard Cite

This study aims to investigate a set of electrocardiogram (ECG) electrode lead locations to improve the quality of four-lead ECG signals acquired during magnetic resonance imaging (MRI). This was achieved by identifying electrode placements that minimized the amount of induced magnetohydrodynamic voltages (V MHD ) in the ECG signals. Reducing V MHD can improve the accuracy of QRS complex detection in ECG as well as heartbeat synchronization between MRI and ECG during the acquisition of cardiac cine. A vector model based on thoracic geometry was developed to predict induced V MHD and to optimize four-lead ECG electrode placement for the purposes of improved MRI gating. Four human subjects were recruited for vector model establishment (Group 1), and five human subjects were recruited for validation of V MHD reduction in the proposed four-lead ECG (Group 2). The vector model was established using 12-lead ECG data recorded from Group 1 of four healthy subjects at 3 Tesla, and a gradient descent optimization routine was utilized to predict optimal four-lead ECG placement based on V MHD vector alignment. The optimized four-lead ECG was then validated in Group 2 of five healthy subjects by comparing the standard and proposed lead placements. A 43.41% reduction in V MHD was observed in ECGs using the proposed electrode placement, and the QRS complex was preserved. A V MHD -minimized electrode placement for four-lead ECG gating was presented and shown to reduce induced magnetohydrodynamic (MHD) signals, potentially allowing for improved cardiac MRI physiological monitoring.

show abstract

Section: Discussionmentioning

confidence: 99%

ECG Electrode Placements for Magnetohydrodynamic Voltage Suppression

2018

View full text Add to dashboard Cite

show abstract

“…Based on ECG Signal. Nonvolatile storage [17] can be freely written and modified by the user, such as programmable, erasable programmable, electrically erasable, flash memory, and storage. Among them, the programmable ROM is manufactured with fuses, and the interconnection between memory cells is realized by blowing the fuses [18].…”

Section: Nonvolatile Memory Programming Mechanismmentioning

confidence: 99%

A New Type of ECG Signal Acquisition and Storage Nonvolatile Chip Embedded in Mobile Devices for Sports Monitoring

Zhang

2022

Journal of Nanomaterials

View full text Add to dashboard Cite

In the fast-paced development of life in today’s society, the use of ECG signals is not only used in the medical direction to scan patients; portable ECG signal acquisition tools can collect and analyze the corresponding ECG signals in time and respond to the wearer in time, so that the user can make timely adjustments or seek medical treatment in time to avoid a malignant situation that occurs. For people in sports, the collection of ECG signals is more helpful to the arrangement and estimation of training conditions. Based on nonvolatile memory technology, data will not be lost when the computer is turned off or suddenly or unexpectedly shut down. This research puts forward the design of an antiexercise ECG monitoring system that collects ECG signals for a group that is in the process of exercise. Use mathematical calculation system to classify, and conduct in-depth analysis of the reasons for poor anti-interference ability, and use the original denoising algorithm calculation as the basis to adapt to the dynamic situation in the opposite situation to the normal ECG signal acquisition in the static state. The collection is modified from the original basis. This research proposes an improved scheme for multichannel acquisition. Chips of semiconductor memory devices based on nonvolatile memory are embedded in mobile devices for use. The experimental results in this paper show that the comparison experiment ratio of collecting ECG signals from the sixth, third, fourth, and fifth directions can effectively reduce the mean square error (MSE), and the error of channel 6 is directly from 0.1598. It is down to 0.00143. Several other items showed a significant decrease. It shows that the anti-interference ability of the ECG monitoring system can be further enhanced by increasing the number of collection terminals.

show abstract

“…Other types of trigger devices such as optical fiber-based gating were developed, and excellent ECG signal quality has been reported [46]. Meanwhile, different filter techniques were developed to reduce ECG distortion during MRI examinations [47][48][49]. In principle, these filter techniques allow electrical ECG recordings for scan synchronization even at high field strengths.…”

Section: Prospective Triggermentioning

confidence: 99%

Technical Aspects of in vivo Small Animal CMR Imaging

Abaei

Metze

et al. 2020

Front. Phys.

View full text Add to dashboard Cite

Cardiovascular magnetic resonance (CMR) imaging has become an accurate and versatile imaging modality to visualize the cardiovascular system in normal or abnormal conditions. In preclinical research, small rodent animal models of human cardiovascular diseases are frequently used to investigate the basic underlying mechanism of normal and abnormal cardiac function and for monitoring the disease progression under therapy. Technical improvements have enabled the transfer of CMR to small animal research, and as such made this non-invasive technique available to provide insights into cardiac morphology, function, perfusion, and pathophysiology in small animal cardiac disease models. This article reviews the basic technical approaches to in vivo small animal magnetic resonance imaging and its variants for the most promising applications.

show abstract

Reducing of gradient induced artifacts on the ECG signal during MRI examinations using Wilcoxon filter

Cited by 10 publications

References 12 publications

ECG Electrode Placements for Magnetohydrodynamic Voltage Suppression

ECG Electrode Placements for Magnetohydrodynamic Voltage Suppression

A New Type of ECG Signal Acquisition and Storage Nonvolatile Chip Embedded in Mobile Devices for Sports Monitoring

Technical Aspects of in vivo Small Animal CMR Imaging

Contact Info

Product

Resources

About