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2015 8th International Conference on Biomedical Engineering and Informatics (BMEI)最新文献

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Primary design of hemodialysis machine detector calibration equipment 初步设计了血透机检测仪标定设备
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401533
Pu Zhang, Jie Sun, Guoqing Wan, Wenli Liu
Hemodialysis machine, regarded as an important clinical application of regular dialysis therapy, is a necessary equipment for the treatments of uremia patients as well as blood poisoning patients. Currently, medical device manufacturers as well as metrology measurement agencies in China usually use hemodialysis machine detectors as the commonly accepted functional calibration equipment for hemodialysis machines. So far, in China, there is no experimental protocol or devices can be used to test the accuracy and reliability of hemodialysis machine detectors, therefore, a set of new metrological apparatus with the name of hemodialysis machine detectors calibration equipment, is on the way of designing in order to make a traceable system for the calibration or verification of hemodialysis machine detectors. Principles and some research methods of this calibration equipment will be discussed in this paper.
血液透析机作为常规透析治疗的重要临床应用,是治疗尿毒症患者以及血液中毒患者的必备设备。目前,国内医疗器械生产企业和计量测量机构普遍采用血透机检测仪作为血透机的通用功能校准设备。到目前为止,在中国还没有实验方案或设备可以用来测试血液透析机检测器的准确性和可靠性,因此,一套名为血液透析机检测器校准设备的新型计量仪器正在设计中,以使血液透析机检测器的校准或验证成为一种可追溯的系统。本文将讨论该标定装置的原理和一些研究方法。
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引用次数: 1
Impulse noise removal in two-dimensional electrophoresis images based on dome recognition 基于圆顶识别的二维电泳图像脉冲噪声去除
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401545
Qiaofeng Ou, Huisheng Zhang, Lixin Li, Bangshu Xiong
Two-dimensional gel electrophoresis (2DE) images are often corrupted by impulse noise in broad sense (including various artifacts, such as fingerprints, hairs, gel cracks, strips, water stains, dust and so on). In this paper, we propose a novel adaptive directional filter (ADF) to remove impulse noise completely and accurately. Firstly, we detect the impulse noise based on the observation that the directional derivative distributions around the protein spot centers and noise pixels are very different. Then, according to the bell-shaped three-dimensional appearance of protein spots, the greatest and smallest gradient directions were used to restore the noised pixels. Lastly, the pixels adjacent to the modified pixels are iteratively detected and restored until no impulse noise is detected. Experimental results on the synthetic and real 2DE images show that the proposed method performs much better than the previous approaches.
二维凝胶电泳(2DE)图像经常受到广义脉冲噪声(包括各种人工制品,如指纹、毛发、凝胶裂纹、条带、水渍、灰尘等)的破坏。本文提出了一种新的自适应定向滤波器(ADF),可以完全准确地去除脉冲噪声。首先,我们根据观察到的蛋白质斑点中心周围的方向导数分布和噪声像素有很大的不同来检测脉冲噪声;然后,根据蛋白质斑点的钟形三维外观,利用最大和最小梯度方向恢复噪声像素。最后,迭代检测和恢复与修改后的像素相邻的像素,直到没有检测到脉冲噪声。在合成和真实2DE图像上的实验结果表明,该方法的性能明显优于以往的方法。
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引用次数: 1
A bandit algorithm for multi-path routing in the emergency convergence network 紧急收敛网络中多路径路由的强盗算法
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401602
Fullerton Wu, Lin Zheng, Xiaoji Li
In the convergence network which consists of cognitive self-organization network and mobile cellular network (MCN), the emergency service requires the network with higher reliability and quality of service (QoS). However, the time-variant factors such as spectrum, channel, network topology, node energy, as well as the gateway performance make the stochastic optimization problem of emergency service complex. In this paper, we create an optimum model which is based on the restless bandit theory[1], and propose an optimum algorithm for multi-path routing selection by considering the routing cross and overlap. In our algorithm, the multi-mode gateways are regarded as the key nodes to construct the routes between cognitive self-organization network and mobile cellular network. The cross and overlapped routes are taken into consideration to loosen and expand the routes set for selection. The communication process is divided into a few path decision stages, and some paths for multicast[2][3] communication are activated according to their real-time status in each stage. The trade-off between delay and energy efficiency is made for multi-path selection. Simulation results verify that our algorithm owns outstanding performance on decreasing delay and improving energy efficiency.
在由认知自组织网络和移动蜂窝网络(MCN)组成的融合网络中,应急服务对网络可靠性和服务质量(QoS)的要求更高。然而,频谱、信道、网络拓扑、节点能量以及网关性能等时变因素使得应急服务的随机优化问题变得复杂。本文基于不宁土匪理论[1]建立了最优模型,提出了一种考虑路由交叉和重叠的多路径路由选择最优算法。该算法将多模式网关作为构建认知自组织网络与移动蜂窝网络之间路由的关键节点。考虑交叉和重叠的路线,使可供选择的路线集更加松散和扩展。将通信过程划分为若干个路径决策阶段,并根据各阶段的实时状态激活部分多播[2][3]通信路径。在多路径选择中,对时延和能效进行了权衡。仿真结果表明,该算法在降低时延和提高能效方面具有优异的性能。
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引用次数: 0
Inferring gene regulatory networks with a scale-free property based informative prior 基于信息先验的无标度特性推断基因调控网络
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401564
Bo Yang, Jiangtao Xu, Bailin Liu, Zheng Wu
Constructing gene regulatory networks (GRNs) with microarray gene data is an essential and challenging task, especially when the underlying structures of networks are not observable in an experimental context. The paper proposes a boosting regression algorithm, called informative prior based GRN construction (ipGRN), to perform GRN inference. The ipGRN utilizes a scale-free based informative prior as well as Bayesian criterion measure to improve inference accuracy. In comparison with three existing methods (NIMOO, lasso and NIR), the ipGRN exhibits a significant improvement of computational accuracy and effectiveness on experiments of synthetic and real datasets. Furthermore, the method was applied to breast cancer data to reconstruct a sub-network of cancer susceptibility genes and achieved better inference results in detecting cancer associated genes.
利用微阵列基因数据构建基因调控网络(grn)是一项必要且具有挑战性的任务,特别是当网络的底层结构在实验环境中无法观察到时。本文提出了一种基于信息先验的GRN构造增强回归算法(ipGRN)来进行GRN推理。ipGRN利用基于无标度的信息先验和贝叶斯准则度量来提高推理精度。与NIMOO、lasso和NIR三种现有方法相比,ipGRN在合成数据集和真实数据集上的计算精度和效率都有显著提高。此外,将该方法应用于乳腺癌数据重构癌症易感基因子网络,在检测癌症相关基因方面取得了较好的推断结果。
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引用次数: 4
Unsupervised segmentation of cell nuclei in cervical smear images using active contour with adaptive local region fitting energy modelling 基于自适应局部区域拟合能量模型的宫颈涂片图像无监督细胞核分割
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401510
Ziming Zeng, Siping Chen, Sheng Tang, Lidong Yin
In this paper, we propose a method based on an adaptive active contour modelling to segment the cell nuclei from cervical smear images. The basic idea of our method is to make a contour to adaptively deform so as to get a minimized given region energy function. In order to make the evolution of the contour rely less on the intensity homogeneity and achieve the purpose of adaptive segmentation of the cell nuclei, the proposed method utilizes the morphology method to initialize the active contour modelling. Then a Gaussian kernel function is used to extract the local region and defines its local region fitting energy function which approximates the image intensities on the two sides of the contour in the local region. Finally, the Split Bregman method is used to obtain a robust numerical solution and to generate the segmentation results. In our experiments, the proposed approach can obtain accurate segmentation results compared with some state-of-the-art approaches.
本文提出了一种基于自适应活动轮廓建模的宫颈涂片图像细胞核分割方法。该方法的基本思想是使轮廓自适应变形,从而得到给定区域能量函数的最小值。为了减少轮廓演化对强度均匀性的依赖,达到细胞核自适应分割的目的,该方法利用形态学方法对活动轮廓建模进行初始化。然后利用高斯核函数提取局部区域,并定义其局部区域拟合能量函数,在局部区域内逼近轮廓两侧的图像强度。最后,采用Split Bregman方法得到鲁棒数值解并生成分割结果。在我们的实验中,与一些现有的方法相比,该方法可以获得准确的分割结果。
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引用次数: 4
Identify cancer survival related mutation genes from integrated TCGA datasets 从整合的TCGA数据集中识别癌症生存相关的突变基因
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401551
Zhenzhen Huang, Haomin Li
Several large-scale human cancer genomics projects such as TCGA offered huge genomic and clinical data for researchers to obtain meaningful genomics alterations which intervene in the development and metastasis of tumors. The object of this study was to identify associations of mutation genes and survival time by linking these genomic features to clinical outcome. Based on the TCGA dataset, this study developed a website called TCGA4U which provides a visualization solution to illustrate the relationship of these genomics alternations with clinical data. Through integrating somatic mutation data and follow up data of three cancer types in TCGA, this study identified several somatic mutations which impact patient survival with statistical significance. These identified mutation genes have the potential to be used as new cancer biomarkers in clinical to predict the survival of patients.
一些大规模的人类癌症基因组项目,如TCGA,为研究人员提供了大量的基因组和临床数据,以获得干预肿瘤发展和转移的有意义的基因组改变。本研究的目的是通过将这些基因组特征与临床结果联系起来,确定突变基因与生存时间的关联。基于TCGA数据集,本研究开发了一个名为TCGA4U的网站,该网站提供了一个可视化解决方案来说明这些基因组学变化与临床数据的关系。本研究通过整合TCGA三种癌症类型的体细胞突变资料和随访资料,发现了影响患者生存的几种体细胞突变,且具有统计学意义。这些已鉴定的突变基因有可能作为新的癌症生物标志物用于临床预测患者的生存。
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引用次数: 0
A cubic spline approach for solving the arterial graft design problem 三次样条法解决动脉移植设计问题
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401513
Dongdong Jiang, Xianliang Hu, Danfu Han
A new algorithm is proposed by the cubic spline to describe the shape of the domain in an arterial graft design problem, which is mathematically modeled with a flow-based shape optimization. The optimization method based on the coefficients of the spline is then studied, where a mixed finite element formulation is used for the flow problem and the moving mesh technique is adopted to track the optimized shape. The numerical results are illustrated to show the convergence of the proposed scheme.
提出了一种用三次样条曲线描述动脉移植设计问题中区域形状的新算法,并用基于血流的形状优化方法对该问题进行了数学建模。然后研究了基于样条系数的优化方法,其中流动问题采用混合有限元公式,并采用移动网格技术对优化形状进行跟踪。数值结果表明了该方法的收敛性。
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引用次数: 2
Compressed sensing based multi-modal medical image fusion using a combined fusion strategy 基于压缩感知的多模态医学图像融合
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401478
Xingbin Liu, Huiqian Du, Jiadi Bei, Wenbo Mei
In this paper, a novel multi-modality medical image fusion method based on compressed sensing by fusing undersampled k-space data is proposed. In order to transfer structural information from the source images into the fused image clearly, a combined fusion strategy is designed for undersampled low and high frequency subbands of k-space data. The final fused image is reconstructed from fused subband data with the conjugate gradient method. The experimental results demonstrate that the proposed algorithm can substantially reduce sampling data and obtain satisfactory results to meet the demand of clinical diagnosis.
本文提出了一种基于压缩感知融合欠采样k空间数据的多模态医学图像融合方法。为了将源图像中的结构信息清晰地传递到融合图像中,针对k空间数据的低、高频欠采样子带设计了一种组合融合策略。最后用共轭梯度法对融合后的子带数据进行重构。实验结果表明,该算法能够大幅减少采样数据,获得满意的结果,满足临床诊断的需要。
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引用次数: 2
Exploiting parallelism for bioinformatics data analysis applications by data transformation graph 利用数据转换图开发生物信息学数据分析应用的并行性
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401595
Zhenchun Huang, Yang Gu, XiaoXuan Bai
Bioinformatics applications which are both data-intensive and computation-intensive bring great challenges to their development and optimization. In order to study and accelerate bioinformatics data analysis models, a method named data transformation graph (DTG) is introduced first. It describes scientific data analysis models by dependencies and transformations among their data items. Then, taking BLAST as an example, DTG is used to study the data dependency in this popular bioinformatics data analysis model and parallel it by both query splitting and database partition. At last, parallel versions of BLAST proposed by DTG are implemented based on a distributed data-intensive computing middleware called Robinia. The result of performance test shows that parallel BLAST can achieve near-linear speedup with good scalability, and data transformation graph can be used to study, parallelize and optimize bioinformatics analysis applications for higher performance.
生物信息学应用是数据密集型和计算密集型的应用,对其开发和优化提出了巨大的挑战。为了研究和加速生物信息学数据分析模型,首先引入了数据转换图(DTG)方法。它通过数据项之间的依赖关系和转换来描述科学数据分析模型。然后,以BLAST为例,利用DTG对这一流行的生物信息学数据分析模型中的数据依赖关系进行研究,并采用查询拆分和数据库分区两种方法对其进行并行处理。最后,基于分布式数据密集型计算中间件Robinia实现了DTG提出的BLAST并行版本。性能测试结果表明,并行BLAST可以实现近线性加速,具有良好的可扩展性,数据转换图可以用于研究、并行化和优化生物信息学分析应用,从而获得更高的性能。
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引用次数: 0
Miniaturized systems with microchips for four isothermal amplification reactions 微型化系统与微芯片四个等温扩增反应
Pub Date : 2015-10-01 DOI: 10.1109/BMEI.2015.7401539
Xing Chen, Lulu Zhang, D. Cui
A real-time fluorescence detection biomedical system with a microfluidic chip was developed for loop-mediated isothermal amplification (LAMP) reactions. Two kinds of microfluidic chips with linear microchannels or microcells were designed and fabricated by MEMS technology and thin-casting method. Both traditional centrifugal tubes and microfluidic chips were used for LAMP reactions. Based on the experimental results of end-point fluorescence detection, the microfluidic chip can be successfully used for LAMP reactions. And then our real-time fluorescence detection biomedical system with a microfluidic chip was used to implement positive reaction and negative control. The volume of the LAMP reaction was greatly reduced from about 25 μL to 2 μL~3 μL and the reaction time can be reduced from one hour to half an hour by using our real-time fluorescence detection biomedical system. This biomedical system has the potential for point-of-care diagnostics (POCT) with the many advantages, such as not high cost, short analysis and detection time, not much reagent and sample consumption and so on.
研制了一种基于微流控芯片的实时荧光生物医学检测系统,用于环介导等温扩增(LAMP)反应。采用微机电系统(MEMS)技术和薄铸工艺,设计制作了线性微通道和微单元两种微流控芯片。LAMP反应采用传统的离心管和微流控芯片。基于端点荧光检测的实验结果,该微流控芯片可成功用于LAMP反应。利用微流控芯片实时荧光检测生物医学系统进行阳性反应和阴性对照。利用实时荧光检测生物医学系统,将LAMP反应的体积从25 μL左右大大减少到2 μL~3 μL,反应时间从1小时缩短到半小时。该生物医学系统具有成本不高、分析检测时间短、试剂和样品消耗少等优点,具有实现即时诊断(POCT)的潜力。
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引用次数: 0
期刊
2015 8th International Conference on Biomedical Engineering and Informatics (BMEI)
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