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2019 IEEE Signal Processing in Medicine and Biology Symposium (SPMB)最新文献

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Software and Data Resources to Advance Machine Learning Research in Electroencephalography 促进脑电图机器学习研究的软件和数据资源
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037851
S. Rahman, M. Miranda, I. Obeid, J. Picone
The Neural Engineering Data Consortium at Temple University has been providing key data resources to support the development of deep learning technology for electroencephalography (EEG) applications [ 1 – 4 ] since 2012. We currently have over 1,700 subscribers to our resources and have been providing data, software and documentation from our web site [5] since 2012. In this poster, we introduce additions to our resources that have been developed within the past year to facilitate software development and big data machine learning research.
自2012年以来,天普大学的神经工程数据联盟一直在提供关键数据资源,以支持脑电图(EEG)应用的深度学习技术的发展[1 - 4]。目前,我们的资源有超过1700名订阅者,自2012年以来,我们一直在网站上提供数据、软件和文档[5]。在这张海报中,我们介绍了在过去一年中为促进软件开发和大数据机器学习研究而开发的新资源。
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引用次数: 0
Analyzing Dry Electrodes for Wearable Bioelectrical Impedance Analyzers 可穿戴式生物电阻抗分析仪干电极分析
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037863
M. Usman, A. Gupta, W. Xue
Dry electrodes are gaining popularity in the area of electronic health for biosignal measurements due to their reusability and comfort as compared to traditional gel-based wet Ag/AgCl electrodes. This paper presents a performance comparison of dry and wet electrodes for medical devices, in particular, for bioelectrical impedance analysis (BIA). BIA is an emerging technology widely used for body composition analysis by computing the impedance of the human body. The designed system for BIA consists of a wearable silicone ring with four copper electrodes. The experiment is conducted on 40 healthy human subjects using both the ring and the Ag/AgCl electrodes. The linear regression demonstrates a high correlation between both electrodes (r = 0.96 for resistance and r = 0.93 for reactance). The measurement of root mean square noise is determined for both electrodes. The dry electrodes demonstrate a higher noise level (1.96 mV) as compared to the wet electrodes (0.282 mV), mainly due to the absence of conductive gel. Moreover, fast Fourier transform is performed to determine and filter out unwanted signals and to reduce the noise level in the dry electrodes. The results demonstrate that the designed ring electrodes have a comparable performance with commercial Ag/AgCl electrodes and can be used in mobile wearable medical devices.
干电极在电子健康领域越来越受欢迎,用于生物信号测量,因为与传统的凝胶基湿Ag/AgCl电极相比,它们具有可重复使用性和舒适性。本文介绍了用于医疗设备的干电极和湿电极的性能比较,特别是用于生物阻抗分析(BIA)。BIA是一种新兴技术,通过计算人体阻抗,广泛应用于人体成分分析。所设计的BIA系统由一个可穿戴的硅胶环和四个铜电极组成。该实验在40名健康受试者身上进行,同时使用环电极和Ag/AgCl电极。线性回归表明两个电极之间具有高度相关性(电阻r = 0.96,电抗r = 0.93)。确定了两个电极的均方根噪声测量值。与湿电极(0.282 mV)相比,干电极表现出更高的噪声水平(1.96 mV),这主要是由于缺乏导电凝胶。此外,采用快速傅立叶变换来确定和滤除不需要的信号,并降低干电极中的噪声水平。结果表明,所设计的环形电极具有与商用Ag/AgCl电极相当的性能,可用于移动可穿戴医疗设备。
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引用次数: 2
Predicting Subjective Sleep Quality Using Recurrent Neural Networks 用循环神经网络预测主观睡眠质量
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037854
Julien Boussard, Mykel J. Kochenderfer, J. Zeitzer
Our goal is to predict subjective sleep quality (SSQ) from objective sleep data and identify the causes and markers of the variances within “normal” sleep. Such information would increase our understanding of the causes of variation in SSQ and potentially improve our ability to improve SSQ. Previous approaches rely on human annotation of the electroencephalographic (EEG) brain signals, to deal with the noisy, high dimensional nature of the EEGs. We aim to use recurrent neural networks to directly analyze and extract useful information from EEG brain signals. We analyze population-based overnight sleep polysomnography data obtained from 4885 community-dwelling adults. We use convolutional and recurrent neural networks to process the EEGs and combine them with information related to health and lifestyle to predict subjective depth and restfulness of sleep. We compare the coefficient of determination to the ones obtained with regression methods and technician annotations of the EEGs in previous studies. Predicting SSQ from our data set of community-dwelling adults using RNNs to analyze the whole EEG signals appear to be less accurate than previous approaches predictions. It might be necessary to acquire more data, possibly with new variables that might be better correlated with SSQ. RNNs are, however, able to extract variables correlated with SSQ from EEG signals. Our results provide insights into how RNNs can be used to extract information from brain signals and how methods such as hierarchical clustering analysis can help neural networks predict subjective variables from polysomnography data.
我们的目标是从客观睡眠数据中预测主观睡眠质量(SSQ),并确定“正常”睡眠中差异的原因和标记。这些信息将增加我们对SSQ变异原因的理解,并有可能提高我们改善SSQ的能力。以前的方法依赖于人类对脑电图(EEG)大脑信号的注释,来处理脑电图的噪声和高维性质。我们的目标是利用递归神经网络直接分析和提取脑电信号中的有用信息。我们分析了4885名社区居民的夜间睡眠多导睡眠图数据。我们使用卷积和循环神经网络来处理脑电图,并将其与健康和生活方式相关的信息相结合,以预测主观睡眠深度和安宁度。我们将决定系数与以往研究中采用回归方法和技术人员注释得到的决定系数进行了比较。使用rnn分析整个脑电图信号,从我们的社区居住成年人数据集预测SSQ似乎比以前的预测方法更不准确。可能有必要获得更多的数据,可能是与SSQ更好相关的新变量。然而,rnn能够从EEG信号中提取与SSQ相关的变量。我们的研究结果为rnn如何从大脑信号中提取信息以及分层聚类分析等方法如何帮助神经网络从多导睡眠图数据中预测主观变量提供了见解。
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引用次数: 1
[Copyright notice] (版权)
Pub Date : 2019-12-01 DOI: 10.1109/spmb47826.2019.9037850
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引用次数: 0
A System for Measuring Sound Transmission Through Joints 一种测量关节声传输的系统
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037844
T. Hassan, L. McKinney, R. Sandler, A. Kassab, C. Price, F. Moslehy, H. Mansy
Sound transmission in the human body can be affected by the tissue composition along the sound path and surrounding structures. Therefore, acoustic transmission may correlate with pathologies involving structural changes. Previous studies utilized sound transmission to detect a variety of pulmonary, gastrointestinal, vascular, cardiac conditions, and developmental dysplasia of the hip (DDH) [1] [2] [3] [4] [5] [6] . The objective of this study is to design and test a reliable system capable of providing adequate acoustic stimulus, and simultaneously measure transmitted signals at multiple skin surface locations. The study objectives include determining: (1) the static load needed to reach a target SNR (>20 dB) at the measurement points and a target coherence (>0.8) between excitation and measurement points; (2) the exciter sensitivity to static load changes; and (3) the exciter input maximum power and corresponding acceleration. These results will help guide the choice of optimal exciter that: (1) can withstand sufficient static load (~500g), which would provide coupling to the bone to reach a target SNR and coherence; (2) has low sensitivity to load (low variability for a load change ~100 gm); (3) can provide sufficient acoustic excitation energy to maintain the target SNR and coherence; (4) be available at a reasonable cost (~<$500); (5) ensures patient comfort (with no subject discomfort reported for a contact area of ~ 2 cm 2 ).
声在人体内的传播受声路沿线的组织组成和周围结构的影响。因此,声传输可能与涉及结构改变的病理有关。先前的研究利用声音传播来检测各种肺部、胃肠道、血管、心脏疾病和髋关节发育不良(DDH)[1][2][3][4][5][6]。本研究的目的是设计和测试一个可靠的系统,能够提供足够的声刺激,并同时测量多个皮肤表面位置的传输信号。研究目标包括确定:(1)在测点处达到目标信噪比(>20 dB)和激励点与测点之间达到目标相干度(>0.8)所需的静态负载;(2)励磁器对静负载变化的灵敏度;(3)励磁器输入最大功率及相应加速度。这些结果将有助于指导最佳激励器的选择:(1)能够承受足够的静载荷(~500g),这将提供与骨骼的耦合以达到目标信噪比和相干性;(2)对负荷的敏感性低(负荷变化的可变性低~100克);(3)能够提供足够的声激发能量,维持目标信噪比和相干性;(4)以合理的成本(~< 500美元)提供;(5)确保患者舒适(接触面积约2 cm 2无受试者不适报告)。
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引用次数: 1
A Pilot Study on Predicting Daytime Behavior & Sleep Quality in Children With ASD 预测ASD儿童日间行为与睡眠质量的初步研究
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037858
A. Alivar, C. Carlson, A. Suliman, S. Warren, P. Prakash, D. Thompson, B. Natarajan
Sleep problems are a common concern for parents and caregivers in children with autism spectrum disorder (ASD). One of the main challenges in sleep studies with these individuals is the difficulty in monitoring sleep quality without sensors and wires attached to the subject’s body. Additionally, there is limited knowledge of how their sleep quality is related to their daytime behaviors. In this study, we evaluate an unobtrusive and inexpensive smart bed system for in-home, long-term sleep quality monitoring using ballistocardiogram (BCG) signals. By extracting different sleep quality indicators using BCG signals, we build bi-directional predictive models for daytime behaviors and nighttime sleep quality using two classifiers as support vector machine (SVM) and artificial neural network (ANN). For all daytime behaviors of interest, we achieve more than 78% average accuracy using previous nights sleep quality. Additionally, night time sleep qualities are predicted with more than 78% average accuracy using previous day and night features.
睡眠问题是自闭症谱系障碍(ASD)儿童的父母和照顾者普遍关心的问题。对这些人进行睡眠研究的主要挑战之一是,在没有传感器和电线连接在受试者身上的情况下,很难监测睡眠质量。此外,人们对他们的睡眠质量与白天行为之间的关系了解有限。在这项研究中,我们评估了一种不引人注目且价格低廉的智能床系统,该系统用于家庭长期睡眠质量监测,使用ballis心动图(BCG)信号。利用BCG信号提取不同的睡眠质量指标,采用支持向量机(SVM)和人工神经网络(ANN)两种分类器构建了日间行为和夜间睡眠质量的双向预测模型。对于所有感兴趣的白天行为,我们使用前一晚的睡眠质量达到了78%以上的平均准确率。此外,利用之前的昼夜特征,预测夜间睡眠质量的平均准确率超过78%。
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引用次数: 3
Modeling Seismocardiographic Signal using Finite Element Modeling and Medical Image Processing 用有限元建模和医学图像处理建模地震心动图信号
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037842
P. Gamage, M. K. Azad, R. Sandler, H. Mansy
Seismocardiography (SCG) is the measurement of the chest surface accelerations that are primarily produced by a combination of mechanical activities of the heart, such as valve closures and openings, blood momentum changes and myocardial movements [ 1 – 3 ]. The complex nature of these processes has made it challenging to relate the morphology of the SCG signal to its genesis. Certain studies have used medical imaging to identify several feature points of the SCG signal by correlating their occurrence time with the corresponding cardiac events seen in imaging [4 , 5] . However, these findings remain inconclusive [6] . The localized movements (i.e. valve openings and closures, ventricular contractions, blood flow accelerations etc.) may superimpose causing complex movements where original movements may amplify or nullify as they reach the chest surface and affect SCG morphology. Hence, SCG signal can also be described as the propagated vibrations generated by individual sources (i.e., valve closures and openings, blood flow accelerations). These vibrations displace their more immediate boundaries (e.g., pericardium, Aorta wall) and surrounding tissues (e.g. lung tissue, ribs, chest wall muscle and skin) before they are detected at the chest surface. Hence, modeling the propagation of overall cardiac wall motion to the chest surface may help enhance our understanding of SCG genesis.
地震心动图(Seismocardiography, SCG)是对胸表面加速度的测量,这种加速度主要是由心脏的机械活动组合产生的,如瓣膜关闭和打开、血流动量变化和心肌运动[1 - 3]。这些过程的复杂性使得将SCG信号的形态与其起源联系起来具有挑战性。一些研究利用医学成像将SCG信号的几个特征点的出现时间与成像中看到的相应心脏事件相关联,从而识别出SCG信号的几个特征点[4,5]。然而,这些发现仍然没有定论[6]。局部运动(即瓣膜开闭、心室收缩、血流加速等)可能叠加导致复杂运动,其中原始运动在到达胸部表面时可能放大或消失,并影响SCG形态。因此,SCG信号也可以被描述为由单个源(即阀门关闭和打开,血流加速)产生的传播振动。这些振动在胸部表面被检测到之前,就会取代它们更直接的边界(如心包、主动脉壁)和周围组织(如肺组织、肋骨、胸壁肌肉和皮肤)。因此,模拟整个心壁运动到胸部表面的传播可能有助于我们对SCG发生的理解。
{"title":"Modeling Seismocardiographic Signal using Finite Element Modeling and Medical Image Processing","authors":"P. Gamage, M. K. Azad, R. Sandler, H. Mansy","doi":"10.1109/SPMB47826.2019.9037842","DOIUrl":"https://doi.org/10.1109/SPMB47826.2019.9037842","url":null,"abstract":"Seismocardiography (SCG) is the measurement of the chest surface accelerations that are primarily produced by a combination of mechanical activities of the heart, such as valve closures and openings, blood momentum changes and myocardial movements [ 1 – 3 ]. The complex nature of these processes has made it challenging to relate the morphology of the SCG signal to its genesis. Certain studies have used medical imaging to identify several feature points of the SCG signal by correlating their occurrence time with the corresponding cardiac events seen in imaging [4 , 5] . However, these findings remain inconclusive [6] . The localized movements (i.e. valve openings and closures, ventricular contractions, blood flow accelerations etc.) may superimpose causing complex movements where original movements may amplify or nullify as they reach the chest surface and affect SCG morphology. Hence, SCG signal can also be described as the propagated vibrations generated by individual sources (i.e., valve closures and openings, blood flow accelerations). These vibrations displace their more immediate boundaries (e.g., pericardium, Aorta wall) and surrounding tissues (e.g. lung tissue, ribs, chest wall muscle and skin) before they are detected at the chest surface. Hence, modeling the propagation of overall cardiac wall motion to the chest surface may help enhance our understanding of SCG genesis.","PeriodicalId":143197,"journal":{"name":"2019 IEEE Signal Processing in Medicine and Biology Symposium (SPMB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132374565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Strados Labs: An Efficient Process to Acquire and Characterize Clinically Validated Respiratory System Information Using a Non-Invasive Bio-Sensor Strados实验室:使用非侵入性生物传感器获取和表征临床验证的呼吸系统信息的有效过程
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037836
N. Capp, V. Fauveau, Y. Au, P. Glasser, T. Muqeem, G. Hassen, A. Cardenas
Patients with respiratory diseases are often rushed to the emergency room with acute decompensation. If not managed properly, chronic respiratory disease prolongs the episode of care or leads to hospital readmissions that are costly and burdensome to the patient. The current standard of care, in an inpatient setting, relies on labor-intensive, eSpisodic clinical assessments to detect signs of worsening disease progression. In the outpatient setting, disease monitoring relies solely on self-reporting by patients. Occasionally, patients have the aid of an instrument, such as a peak flow meter, but these aids are prone to user error and cannot always accurately report critical data 0. Additionally, patients with COPD (Chronic Obstructive Pulmonary Disease) and asthma often receive inadequate treatment due to poor communication between the patient and clinician [2] – [3] , poor disease status assessment by the clinician, inconsistent use of medication [4] – [5] , or the unreliability of peak flow measurements 0. A system capable of continuously and remotely monitoring a patient’s respiratory health could address this disconnect in patient care. Utilizing an intelligent patient monitoring system could improve patient care triage, reduce the length of hospital stay, lower the healthcare costs incurred by expensive pulmonary complications, and standardize the objective assessment of a patient’s respiratory health.
患有呼吸系统疾病的患者往往因急性代偿丧失而被送往急诊室。如果管理不当,慢性呼吸道疾病会延长治疗时间或导致再次住院,这对患者来说是昂贵和负担的。在住院环境中,目前的护理标准依赖于劳动密集型的eSpisodic临床评估来发现疾病恶化的迹象。在门诊环境中,疾病监测完全依赖于患者的自我报告。偶尔,患者有仪器的帮助,如峰值流量计,但这些辅助工具容易出现用户错误,并不能总是准确地报告关键数据。此外,COPD (Chronic Obstructive Pulmonary Disease,慢性阻塞性肺疾病)和哮喘患者往往由于患者与临床医生沟通不畅[2]-[3]、临床医生疾病状态评估不佳、用药不一致[4]-[5]或峰值流量测量不可靠等原因而得不到充分的治疗。一个能够持续远程监测患者呼吸健康的系统可以解决患者护理中的这种脱节问题。利用智能患者监测系统可以改善患者的护理分类,缩短住院时间,降低昂贵的肺部并发症带来的医疗费用,并规范患者呼吸健康的客观评估。
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引用次数: 0
Commodity Sensors, Physiological Signals, Research Opportunities, and Practical Issues 商品传感器,生理信号,研究机会和实际问题
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037855
Michael W. Stanford, V. Stanford
We discuss selected emerging technologies in physiological signal processing, low-cost pervasive sensors, diagnostic pattern recognition, and some research issues they entail. Serious practical issues remain for signal acquisition from users in their own environments using these commodity sensors. To illustrate the technical issues, we describe a novel robust processing algorithm for mobile ECG sensors (i.e. non-contact capacitive sensors with low signal-to-noise ratios). We describe the detection techniques designed to function effectively with such noisy ECG data.
我们讨论了生理信号处理、低成本普适传感器、诊断模式识别方面的一些新兴技术,以及它们所涉及的一些研究问题。使用这些商品传感器从用户自己的环境中获取信号仍然存在严重的实际问题。为了说明技术问题,我们描述了一种新的用于移动ECG传感器(即具有低信噪比的非接触电容式传感器)的鲁棒处理算法。我们描述了检测技术的设计,以有效地处理这种有噪声的心电数据。
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引用次数: 1
Comparison of EMG-Force Calibration Protocols for Myoelectric Control of Prostheses 假肢肌电控制的肌电-力标定方案比较
Pub Date : 2019-12-01 DOI: 10.1109/SPMB47826.2019.9037835
Z. Zhu, J. Li, C. Dai, C. Martinez-Luna, B. McDonald, T. Farrell, X. Huang, E. Clancy
The surface electromyogram (EMG) is used as a control source for limb prostheses. When developing hand-wrist prostheses control schemes with able-bodied subjects, it is common to relate forearm EMG to hand-wrist forces/moments using supervised models. However, subjects with unilateral limb absence cannot produce such forces. Thus, we contrasted use of “output” alternatives from the force generated by the sound side in “mirror” movements [ 1 – 2 ], or directly using a target followed with their limb-absent side [ 3 – 4 ].
表面肌电图(EMG)被用作假肢的控制源。当对健全的受试者开发手-手腕假肢控制方案时,通常使用监督模型将前臂肌电图与手-手腕力/力矩联系起来。然而,单侧肢体缺失的受试者不能产生这种力。因此,我们对比了在“镜像”运动中使用声音侧产生的力的“输出”选择[1 - 2],或直接使用目标与其肢体缺失侧[3 - 4]。
{"title":"Comparison of EMG-Force Calibration Protocols for Myoelectric Control of Prostheses","authors":"Z. Zhu, J. Li, C. Dai, C. Martinez-Luna, B. McDonald, T. Farrell, X. Huang, E. Clancy","doi":"10.1109/SPMB47826.2019.9037835","DOIUrl":"https://doi.org/10.1109/SPMB47826.2019.9037835","url":null,"abstract":"The surface electromyogram (EMG) is used as a control source for limb prostheses. When developing hand-wrist prostheses control schemes with able-bodied subjects, it is common to relate forearm EMG to hand-wrist forces/moments using supervised models. However, subjects with unilateral limb absence cannot produce such forces. Thus, we contrasted use of “output” alternatives from the force generated by the sound side in “mirror” movements [ 1 – 2 ], or directly using a target followed with their limb-absent side [ 3 – 4 ].","PeriodicalId":143197,"journal":{"name":"2019 IEEE Signal Processing in Medicine and Biology Symposium (SPMB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128815429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2019 IEEE Signal Processing in Medicine and Biology Symposium (SPMB)
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