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2014 International Conference on Medical Imaging, m-Health and Emerging Communication Systems (MedCom)最新文献

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Performance evaluation of ZigBee network for multi-patient cardiac monitoring in intra-hospital scenario ZigBee网络在院内多病人心脏监测中的性能评价
Tarique Rashid, B. Kumar, Shashwat Pathak, Arvind Kumar
This paper presents performance analysis of ZigBee network in intra-hospital environment for multi-patient cardiac monitoring. A telemedicine scenario has been proposed where ECG signals of patients in Cardiac Care Unit (CCU) are being transmitted using ZigBee network. These signals are monitored continuously at Nursing Station (NS) on compact handheld devices like Personal Digital Assistant (PDA). The low power and small size ZigBee devices have the ability to form self configuring networks (Ad-hoc network) that can extend themselves through a hospital network. Performance of the proposed Wireless Body Area Network (WBAN) is evaluated for various routing protocols by varying transmission power and simulation results are obtained in terms of throughput, end to end delay, packet delivery ratio, total power consumed and network lifetime.
本文介绍了ZigBee网络在医院内多病人心脏监测环境下的性能分析。提出了一种利用ZigBee网络传输心电监护病房(CCU)患者心电信号的远程医疗方案。这些信号在护理站(NS)的小型手持设备(如个人数字助理(PDA))上持续监测。低功耗和小尺寸的ZigBee设备具有形成自配置网络(Ad-hoc网络)的能力,可以通过医院网络扩展自己。通过不同的传输功率对所提出的无线体域网络(WBAN)的各种路由协议的性能进行了评估,并在吞吐量、端到端延迟、分组传输比、总功耗和网络寿命方面获得了仿真结果。
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引用次数: 3
Comparitive analysis of various cloud based biomedcial services 各种基于云的生物医学服务的比较分析
Abhinav Hans, S. Kalra
Cloud computing is one of the vast field which provide the users with software's on lease. Cloud computing not only benefiting the computer science world but also it is beneficial for biomedical stream too. Cloud based e-health services can provide a better environment to the patient where he/she can get all kind of medical care that will be given in the hospital. Therefore it saves a lot time of the users by just sending all kind of necessary real time analyzed data to the doctor via cloud and gets prescribed medicine. In this paper we will study various biomedical services that have been provided on cloud. Also we will make a comparative study of these cloud based biomedical services at the end of the paper.
云计算是为用户提供软件租赁服务的广阔领域之一。云计算不仅有利于计算机科学领域,也有利于生物医学领域。基于云的电子医疗服务可以为患者提供更好的环境,在那里他/她可以获得医院提供的各种医疗服务。因此,它只需将各种必要的实时分析数据通过云发送给医生并获得处方,从而节省了用户的大量时间。在本文中,我们将研究在云上提供的各种生物医学服务。在文章的最后,我们还将对这些基于云的生物医学服务进行比较研究。
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引用次数: 2
Myocardial infarction detection using magnitude squared coherence and Support Vector Machine 基于幅度平方相干性和支持向量机的心肌梗死检测
K. Padmavathi, K. R. Krishna
This paper presents Magnitude Squared coherence(MSC) technique and Support Vector Machines (SVM) using kernel function for the classification of Inferior Myocardial Infarction. The coherence function finds common frequencies between two signals and evaluate the similarity of the two signals. MSC technique uses Welch method for calculating PSD. For the detection of normal and IMI beats, MSC technique output values are given as the input features for the SVM classifier. Overall accuracy of SVM classifier is 99.3 percent. The data was collected from MIT/BIH PTB database.
本文提出了相干度平方(MSC)技术和核函数支持向量机(SVM)对下壁心肌梗死的分类。相干函数找到两个信号之间的共同频率,并评估两个信号的相似度。MSC技术采用Welch法计算PSD。对于正常节拍和中频节拍的检测,给出MSC技术的输出值作为SVM分类器的输入特征。SVM分类器的总体准确率为99.3%。数据来自MIT/BIH PTB数据库。
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引用次数: 21
Extraction and analysis of nail-fold capillaries 甲襞毛细血管的提取与分析
S. Charan, K. Suma, B. Rao
Nail-fold capillaries exhibit distinctive features which help in early diagnosis of various anomalies like diabetes. The examination of microcirculation of nail-fold capillaries serves as the window to monitor one's health condition as the changes in nail-fold microcirculation often indicate certain clinical disorders. This way of finding disorders is a less harmful technique. Separation of multiple layers of capillary in an image is performed using Speeded Up Robust Features (SURF). The capillary images have lot of smudge and blur in them which makes it difficult to extract the capillaries. This is tackled by using varied metric threshold in SURF features. Cross-correlation between a reference capillary image and the test image is used to separate one layer of capillaries. Extraction of the single capillary is performed via SURF points. This gives the density of capillaries in an image and also talks about the avascularity. The proposed techniques gave satisfactory results in the measurement of density of capillaries and avascularity and hence detecting the anomalies.
甲襞毛细血管表现出独特的特征,有助于早期诊断各种异常,如糖尿病。甲襞微循环的变化往往预示着某些临床疾病,因此甲襞微循环的检查是监测健康状况的窗口。这种发现疾病的方法是一种危害较小的技术。使用加速鲁棒特征(SURF)对图像中的多层毛细管进行分离。毛细管图像中存在大量的污迹和模糊,这给提取毛细管带来了困难。这是通过在SURF特征中使用不同的度量阈值来解决的。参考毛细管图像和测试图像之间的相互关系被用来分离一层毛细管。单个毛细管的提取通过SURF点进行。这给出了图像中毛细血管的密度,也讨论了无血管性。所提出的技术在测量毛细血管密度和无血管密度,从而检测异常方面取得了令人满意的结果。
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引用次数: 0
Machine learning approach for epileptic seizure detection using wavelet analysis of EEG signals 基于脑电信号小波分析的癫痫发作检测的机器学习方法
Abhishek Kumar, M. Kolekar
Analysis of EEG is the primary method for diagnosis of epilepsy. In this paper discrete wavelet transform is used for the time-frequency analysis of EEG signal. Using discrete wavelet transform, EEG signal is decomposed into five different frequency bands namely delta, theta, alpha, beta and gamma. Only theta, alpha and beta carry seizure information. Statistical feature like energy, variance and zero crossing rate and nonlinear feature like fractal dimension is extracted from each of the three sub bands and fed to support vector machine classifier. Support vector machine classifies the input EEG signal into seizure free and seizure signal. Experimental results show that the proposed method classifies EEG signals with excellent accuracy, sensitivity and specificity compared to the existing methods.
脑电图分析是诊断癫痫的主要方法。本文采用离散小波变换对脑电信号进行时频分析。利用离散小波变换将脑电信号分解为δ、θ、α、β和γ五个不同的频段。只有θ, α和β携带癫痫信息。从每个子带中提取能量、方差、过零率等统计特征和分形维数等非线性特征,并将其输入到支持向量机分类器中。支持向量机将输入的脑电信号分为无发作信号和发作信号。实验结果表明,与现有方法相比,该方法对脑电信号的分类具有良好的准确性、灵敏度和特异性。
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引用次数: 44
Multiple narrowband interference mitigation in UWB body area networks for body surface communications 体表通信中UWB体域网络的多窄带干扰抑制
D. K. Rout, Susmita Das
Wireless Body Area Networks (BAN) are being developed to provide health care to patients on the move. Ultra wideband (UWB) is the most preferred candidate for the communication due to its high data rate and lower energy consumption characteristics. Since the data is transmitted wirelessly and narrowband systems are already using frequency bands within the UWB spectrum, a major concern here will be the interference from these existing narrowband wireless networks. The paper presents a novel narrowband interference mitigation method for UWB based Body Area Networks. The technique has been tested in the CM3 channel model for Body Surface communications. Comparison with other techniques demonstrate that the proposed method is far superior and immune to multiple narrowband interferences.
正在开发无线体域网络(BAN),以便为移动中的患者提供医疗保健。超宽带(UWB)以其高数据速率和低能耗的特点成为通信的首选。由于数据是无线传输的,而窄带系统已经在使用超宽带频谱内的频段,因此这里的一个主要问题将是来自这些现有窄带无线网络的干扰。提出了一种基于超宽带体域网络的窄带干扰抑制方法。该技术已在用于体表通信的CM3信道模型中进行了测试。与其他技术的比较表明,该方法具有明显的优越性,且不受多种窄带干扰。
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引用次数: 1
Emotional speech characterization for real time applications in real environments 情感语音表征在真实环境中的实时应用
J. B. Alonso, Josue Cabrera, Miguel A. Ferrer, J. M. Canino, C. Travieso, M. Dutta, Anushikha Singh
A simple and effective method of automatic discrimination between emotional and unemotional speech is presented. Traditional methods of emotional discrimination use prosodic and paralinguistic features, which are determined by a linguistic segmentation of the locution. However, these methods are not appropriate in real time applications because of their high computational cost and the linguistic segmentation requirement by locutions. This letter proposes a new strategy based on a few prosodic and paralinguistic features set obtained from a temporal segmentation of the speech signal. This new strategy is robust to interfering noises that are present in real environments, offering a low computational cost and improving the performance of a segmentation based on linguistic aspects.
提出了一种简单有效的情感言语和非情感言语自动判别方法。传统的情感识别方法使用韵律和副语言特征,这些特征是由话语的语言切分决定的。然而,这些方法由于计算成本高,并且需要按词进行语言分割,因此不适合实时应用。本文提出了一种基于语音信号时间分割获得的韵律和副语言特征集的新策略。这种新策略对真实环境中存在的干扰噪声具有鲁棒性,提供了较低的计算成本,并提高了基于语言方面的分割性能。
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引用次数: 0
An improved medical image fusion approach using PCA and complex wavelets 基于PCA和复小波的医学图像融合方法
Himanshi, V. Bhateja, Abhinav Krishn, Akanksha Sahu
Medical image fusion facilitates the retrieval of complementary information from medical images for diagnostic purposes. This paper presents a combination of Principal Component Analysis (PCA) and Dual Tree Complex Wavelet (DTCWT) as an improved fusion approach for MR and CT-scan images. Unlike real valued discrete wavelet transforms, DTCWT provides shift invariance and improved directionality along with preservation of spectral content. The decomposed images are then processed using PCA a based fusion rule to improve upon the resolution and reduce the redundancy. Simulation results demonstrate an improvement in visual quality of the fused image supported by higher values of fusion metrics; this further justifies the effectiveness of the proposed approach in comparison to other approaches.
医学图像融合有助于从医学图像中检索用于诊断目的的互补信息。本文提出了一种结合主成分分析(PCA)和双树复小波(DTCWT)的改进MR和ct图像融合方法。与实值离散小波变换不同,DTCWT提供平移不变性和改进的方向性以及保留频谱内容。然后使用基于PCA的融合规则对分解后的图像进行处理,以提高分辨率并减少冗余。仿真结果表明,较高的融合度量值可以提高融合图像的视觉质量;这进一步证明,与其他办法相比,拟议的办法是有效的。
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引用次数: 29
Machine intelligence based identification of body movements in Ambulatory ECG (A-ECG) 基于机器智能的动态心电图(A-ECG)身体运动识别
Dixit V. Bhoraniya, R. Kher
Ambulatory ECG signal (A-ECG) is useful when long term cardiac monitoring of a patient is necessary. Ambulatory ECG monitoring provides electrical activity of the heart while a person is involved in doing his or her normal routine activities. Thus, the recorded ECG signal consists of cardiac signal along with motion artifacts introduced due to person's body movements during routine activities. This motion artifact has spectral overlap with cardiac signal in 1-10 Hz which corresponds to ECG features like P wave and T wave. These artifacts due to different physical activities (PA) might help in further cardiac diagnosis. For Classification of body movements, first the motion artifacts from A-ECG have been extracted using Adaptive filtering and discrete wavelet transform (DWT) approaches. The statistical parameters such as mean, median, variance, max value of extracted motion artifact signals are calculated. After that feature vector is created by combining principal components and above four parameters of respective motion artifacts signals. These combine features are fed to multilayer feed-forward neural network (MLPFNN) for classification. For this work the ECG signals of six healthy subjects (aged of 19 to 26 years) were recorded while the person performs various body movements activity like (i) up and down movement of left hand, (ii) up and down movement of right hand, (iii) waist twisting movement while standing and (iv) change in position from sitting down on chair to standing up movement in lead I configuration by using BIOPAC MP 36 signal acquiring system.
动态心电图信号(a -ECG)在需要对患者进行长期心脏监测时是有用的。动态心电图监测提供了一个人在做他或她的正常日常活动时心脏的电活动。因此,记录的心电信号由心脏信号以及由于人在日常活动中身体运动而引入的运动伪影组成。该运动伪影在1 ~ 10hz范围内与心脏信号有频谱重叠,对应于P波和T波等ECG特征。这些由不同身体活动(PA)引起的伪影可能有助于进一步的心脏诊断。首先,采用自适应滤波和离散小波变换(DWT)方法提取A-ECG的运动伪影。计算提取的运动伪信号的均值、中值、方差、最大值等统计参数。然后将各自运动伪影信号的主成分和以上四个参数组合,生成特征向量。将这些组合特征馈送到多层前馈神经网络(MLPFNN)中进行分类。本研究采用BIOPAC mp36信号采集系统,记录6名年龄在19 ~ 26岁的健康受试者在进行(1)左手上下运动、(2)右手上下运动、(3)站立时扭腰运动、(4)在导联1配置下从椅子上坐下到站起来运动等身体运动时的心电信号。
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引用次数: 3
Design of single stage integrated bridgeless-boost PFC converter 单级集成无桥升压PFC变换器的设计
G. Anand, Shri S. K. Singh
DC power supplies are used in the extreme way in almost all electronic and electrical appliances eg : personal computers, audio sets, TV, Adapters etc. This paper discusses the reduced high conduction losses & increased efficiency of the proposed integrated Bridgeless-Boost PFC converter. By modifying the circuit according to the technology and the necessity the overall power factor can be improved to the expectation of user. The cause of having low power factor in the bridgeless power factor converter is the presence of two energy conversion stages. These stages cause more conduction losses into the circuit. In this paper research is advanced and preceded on the concept of single stage power converter. This highly efficient single stage integrated Bridgeless-Boost power factor correction converter is proposed. Introduction of the Bridgeless-Boost rectifier is given in the first section i.e. SECTION I showing how the BBPFC overcomes the drawbacks of the conventional boost PFC circuit. SECTION II explains the different approaches used for integration of PFC circuits. In SECTION III the proposed circuit is introduced and its complete operating modes are explained. Then finally superiority of the proposed circuit is verified by doing the simulation and verifying the results in the last section. Complete experimental analysis of the circuit is done on 230V ac, 50 Hz. Thus this paper introduces the Integrated Bridgeless-Boost PFC Converter along with the verification with the simulated and experimented results.
直流电源被广泛应用于几乎所有的电子电器中,例如:个人电脑、音响、电视、适配器等。本文讨论了所提出的集成无桥升压PFC变换器降低了高导通损耗和提高了效率。根据技术要求和需要对电路进行修改,使整体功率因数达到用户的期望。无桥功率因数变换器功率因数低的原因是存在两个能量转换阶段。这些级导致更多的传导损耗进入电路。本文对单级功率变换器的概念进行了超前的研究。提出了一种高效的单级集成无桥升压功率因数校正变换器。第一节介绍了无桥升压整流器,即第一节展示了BBPFC如何克服传统升压PFC电路的缺点。第二节解释了用于PFC电路集成的不同方法。在第三节中介绍了所提出的电路,并解释了其完整的工作模式。最后通过仿真和验证最后一节的结果,验证了所提电路的优越性。完整的实验分析电路在230V交流,50hz下完成。因此,本文介绍了集成式无桥升压PFC变换器,并对仿真和实验结果进行了验证。
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引用次数: 6
期刊
2014 International Conference on Medical Imaging, m-Health and Emerging Communication Systems (MedCom)
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