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2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014)最新文献

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A novel live cell imaging method with sub-cellular resolution for cell-based assays 一种新型的活细胞成像方法,具有亚细胞分辨率,用于基于细胞的检测
Chengxiong Wu, Q. Fang
A lightweight imaging method based on electrolyte-insulator-semiconductor (EIS) structure was developed to analyze single cells. Cells were cultured on the EIS structure surface, and the impedance of this cell-based biosensor was measured by two-electrode electrochemical system. For the field-effect and internal photoelectric effect of semiconductor and the electric insulativity of living cell, difference impedance was detected when a scanning laser irradiated at the cell-free and cell-on area respectively. Thus, an image of cell distribution and adhesion could be obtained by calculating impedance for each scanning point. The results of the experiment showed that the spatial resolution of the proposed imaging method could reach to 5 μm, and the sensitivity was high, which indicate that it has great potential to be used in various cell-based assays, such as cytotoxicity detection, drug evaluation and cancer research.
提出了一种基于电解质-绝缘体-半导体(EIS)结构的单细胞轻量化成像方法。在EIS结构表面培养细胞,采用双电极电化学系统测量细胞生物传感器的阻抗。针对半导体的场效应和内部光电效应,以及活细胞的电绝缘性,采用扫描激光分别照射在细胞无区和细胞带电区检测差分阻抗。因此,通过计算每个扫描点的阻抗,可以得到细胞分布和粘附的图像。实验结果表明,该成像方法的空间分辨率可达5 μm,灵敏度高,在细胞毒性检测、药物评价和癌症研究等多种细胞检测中具有很大的应用潜力。
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引用次数: 0
Gold microelectrode arrays with monolithically-integrated circuits for label-free monitoring of bio-molecule interaction in-situ 带单片集成电路的金微电极阵列用于生物分子相互作用的无标记监测
Yu-Chieh Lee, Hsin Chen
This paper presents a CMOS chip integrating EGFETs (extended-gate field-effect transistors) with gold microelectrodes for label-free monitoring of the DNA amplification. The accumulation of intrinsic charges of DNAs causes the surface potential of microelectrodes to change gradually, and the potential change is detected by the readout circuit integrated with the microelectrodes. A second-order Bessel low pass filter is further employed to eliminate both high-frequency noise and ground interferences.
本文提出了一种集成egfet(扩展栅场效应晶体管)和金微电极的CMOS芯片,用于DNA扩增的无标记监测。dna固有电荷的积累使微电极的表面电位逐渐发生变化,这种电位变化通过集成在微电极上的读出电路来检测。采用二阶贝塞尔低通滤波器进一步消除高频噪声和地干扰。
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引用次数: 0
An 802.15.4a wide band frequency synthesizer for 5GHz ISM band health care applications 一种用于5GHz ISM频段医疗保健应用的802.15.a宽带频率合成器
Ko-Chi Kuo, Chi-Wei Wu
This paper presents a wide tuning, low phase noise, and fast locking CMOS integer-N frequency synthesizer with 1.8V power supply. The proposed design can be used for the IEEE 802.15.4a unlicensed ultra-wideband healthcare applications such as body sensor network. The operating frequency range of the proposed design is ranged from 4.6 GHz to 5.6 GHz for the local oscillator of the RF front-end circuits. The proposed frequency synthesizer consists of a fast-phase-frequency detector charge pump (Fast-PFDCP), a dual mode low-pass loop filter (Dual_Mode_LPF), a voltage control oscillator, an auto-band selection (ABS), an optimum-band selection (OBS), a lock detector, and a pulse-swallow divider. By adapting the Auto Band Selection (ABS), the proposed design can reduce the calibration time by using the binary search algorithm to select the calibration word. In addition, the Optimal Band Selection (OBS) algorithm is proposed to acquire the optimum band which exhibits the minimum VCOμ gainμ variation which can affect the performance of phase noise of overall frequency synthesizer significantly. Furthermore, the design of the voltage-controlled oscillator with the switch-capacitor technique can achieve the wide tuning range and the low phase noise in order to cover the desired operating frequency bands and to accommodate process, voltage, and temperature (PVT) variations. The frequency synthesizer is designed by using the TSMC 0.18μm CMOS 1P6M technology.
本文提出了一种宽调谐、低相位噪声、快速锁定的1.8V电源CMOS整n频率合成器。本设计可用于IEEE 802.15.4a免授权超宽带医疗保健应用,如身体传感器网络。射频前端电路的本振工作频率范围为4.6 GHz ~ 5.6 GHz。该频率合成器由快速相频检测器电荷泵(Fast-PFDCP)、双模低通环路滤波器(Dual_Mode_LPF)、电压控制振荡器、自动选带(ABS)、最优选带(OBS)、锁相检测器和吞脉分压器组成。该设计采用自动选带(ABS)技术,采用二叉搜索算法选择标定字,减少了标定时间。此外,提出了最优频带选择(OBS)算法,以获取vco增益变化最小的最优频带,这对整个频率合成器的相位噪声性能有显著影响。此外,采用开关电容技术设计的压控振荡器可以实现宽调谐范围和低相位噪声,以覆盖所需的工作频段,并适应过程、电压和温度(PVT)的变化。频率合成器采用台积电0.18μm CMOS 1P6M工艺设计。
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引用次数: 1
Profiling mitochondrial complex I inhibitors by combining mitochondrial morphological features and maximum common chemical substructures 结合线粒体形态特征和最常见的化学亚结构分析线粒体复合体I抑制剂
Chung-Chih Lin, Jyh-Ying Peng, Y. Tseng, C. Chou, F. Chang, Y. Wu, L. Kao, Chun-Nan Hsu
Studies on the mechanism of toxins are important to reveal the etiology of Parkinson's disease (PD). Complex I inhibitors are a main group of PD toxins, and their chemical features have been intensively studied. However, the chemical structures specific to mitochondrial morphological changes are still unknown. We developed a drug profiling system that combines mitochondrial morphological quantification and chemical substructure computation, which allows us to discover chemical substructures specific to mitochondrial morphological changes. Using this system, we quantified the mitochondrial morphology induced by annonaceous acetogenins, and calculated the maximum common substructure of acetogenins inducing similar cell responses. We discovered that (1) the hydroxyl groups close to γ-lactone in annonacin may result in stronger effects on nuclear size reduction and mitochondrial aggregation; (2) bis-THF acetogenins may have less mitochondria aggregation than those of mono-THF acetogenins; (3) less hydroxyl group at the alkyl chain opposite from γ-lactone end may result in less mitochondrial fission.
毒素作用机制的研究对于揭示帕金森病的病因学具有重要意义。配合物I抑制剂是PD毒素的主要种类,其化学特性已被广泛研究。然而,线粒体形态变化的特定化学结构仍然未知。我们开发了一种结合线粒体形态定量和化学子结构计算的药物分析系统,使我们能够发现线粒体形态变化特有的化学子结构。利用该系统,我们量化了无性系乙酰原素诱导的线粒体形态,并计算了诱导类似细胞反应的乙酰原素的最大共同亚结构。我们发现(1)甘露酸中靠近γ-内酯的羟基对细胞核大小缩小和线粒体聚集的作用更强;(2)双四氢呋喃乙酰原可能比单四氢呋喃乙酰原有更少的线粒体聚集;(3)与γ-内酯端相反的烷基链羟基越少,线粒体分裂越少。
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引用次数: 0
3D image processing for mitochondria morphology variation analysis 线粒体形态变异分析的三维图像处理
Han-Wei Dan, Wan-Chi Hung, Y.‐S. Tsai, Chung-Chih Lin
Mitochondria play an important role in producing energy of cell, aging and cell death. Previous investigations suggest that mitochondrial dysfunctions are associated with neurodegenerative, and the peripheral blood cells of those patients have validation of mitochondrial morphology. This study presents an analysis system of automated 3D mitochondrial morphology of lymphocytes in 3D images to reveal morphological features of mitochondria, and this system is specific for analyzing mice T lymphocyte precursors in thymus and mature lymphocytes in spleen. Mitochondria in original confocal and deconvoluted wild-field micrographs are segmented by Support Vector Machine, and then image features are extracted for morphological subtype clustering. The distribution of subtypes in individual lymphocytes is used to classify precursors and mature lymphocytes by decision tree. There are more short tubules in spleen lymphocyte, and more globules in thymus lymphocyte. The accuracy of cell classified from confocal and wild-field images in this system are both over 96% for training set, and for testing set, the accuracy for confocal and wild-field micrographs are 79% and 71% respectively. In conclusions, this new system can be used for investigations of lymphocyte development and drug discovery for inflammation and immunity.
线粒体在细胞能量产生、细胞衰老和细胞死亡中起着重要作用。先前的研究表明,线粒体功能障碍与神经退行性疾病有关,这些患者的外周血细胞线粒体形态得到了验证。本研究提出了一种用于分析小鼠胸腺T淋巴细胞前体和脾脏成熟淋巴细胞的三维图像自动线粒体形态分析系统,以揭示线粒体的形态特征。利用支持向量机对原始共聚焦和反卷积野外显微照片中的线粒体进行分割,提取图像特征进行形态亚型聚类。采用决策树法对单个淋巴细胞的亚型分布进行分类。脾淋巴细胞短小管较多,胸腺淋巴细胞小球较多。对于训练集,共聚焦和野场图像的细胞分类准确率均超过96%,对于测试集,共聚焦和野场图像的细胞分类准确率分别为79%和71%。总之,该系统可用于淋巴细胞发育和炎症免疫药物的研究。
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引用次数: 3
A Bluetooth-based Low-Energy Qi-compliant battery charger for implantable medical devices 基于蓝牙的低能量qi兼容电池充电器,用于植入式医疗设备
S. Hached, Aref Trigui, Imane El Khalloufi, M. Sawan, Oleg Loutochin, J. Corcos
In this paper, we present a smart battery charging system implementing the recently established Qi wireless power transmission standard. Proposed device offers the possibility of charging batteries with any Qi certified power transmitter. It eliminates the dependency to a special charger making energy supplying possible in public places and foreign countries without special equipment or adapters. It is remotely controlled through Bluetooth Low Energy protocol allowing real-time control and supervision with smartphones. The proposed device can be used with single or multiple implants architecture. Experiments have been conducted with various implants prototypes. Proposed charging system ensured proper operation and supervision. System design and experimental results are reported and discussed.
本文提出了一种基于Qi无线传输标准的智能电池充电系统。拟议的设备提供了使用任何Qi认证的电源发射器为电池充电的可能性。它消除了对特殊充电器的依赖,使公共场所和国外的能源供应成为可能,而无需特殊设备或适配器。它通过蓝牙低功耗协议远程控制,允许智能手机实时控制和监督。所提出的器件可用于单个或多个植入物结构。已经用各种植入物原型进行了实验。所提出的收费制度确保了正确的操作和监督。对系统的设计和实验结果进行了报道和讨论。
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引用次数: 21
Implementation of a real-time ECG signal processor 实现了一个实时心电信号处理器
Shih-Yu Chang Chien, Cheng-Han Hsieh, Mark Po-Hung Lin, Q. Fang, Shuenn-Yuh Lee
A real-time ECG beat detection and classification system integrated with a decimation filter is presented in this paper. The decimation filter with a decimation ratio of 128 is utilized with four stages to optimize power. The beat detection algorithm is based on multi-scale Haar wavelet transform. The first step of the beat detection algorithm is to define a region composed of 128 sample points. The next step is to define the beat position. The beat detection algorithm which is verified with data from MIT/BIH Arrhythmia Database achieves a sensitivity of 99.67% and a positive predictability of 99.59%. The used heartbeat classification algorithm is called maximum similarity comparisons. The parameter of the classification is programmable for doctors. This proposed system can realize multiple functions in real time. This chip is fabricated in a 0.18 μm standard CMOS technology with chip area of 4.84 mm2, which achieves low power consumptions and can carry out a long term cardiac monitoring.
提出了一种结合抽取滤波器的心电实时心跳检测与分类系统。采用抽取比为128的抽取滤波器,分四级优化功率。温度检测算法基于多尺度Haar小波变换。节拍检测算法的第一步是定义一个由128个采样点组成的区域。下一步是定义节拍位置。用MIT/BIH心律失常数据库的数据验证了该算法的灵敏度为99.67%,正预测性为99.59%。使用的心跳分类算法称为最大相似度比较。分类参数为医生可编程。该系统可以实时实现多种功能。该芯片采用0.18 μm标准CMOS工艺制造,芯片面积为4.84 mm2,实现了低功耗,可进行长期心脏监测。
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引用次数: 10
Using ECG surface electrodes in measurement of respiration rate for preterm infants 使用ECG表面电极测量早产儿呼吸速率
H. Kuo, Ning-Huei Peng, T. Kao, Weichih Hu
Sudden infant death syndrome (SIDS) is the common cause of death in infants. Apnea is known to be associated with increased incidence of the SIDS. A cessation of breathing, longer than 15 seconds, or accompanied by hypoxia or bradycardia, is called apnea of prematurity and has been found in more than 50% of premature infants. We have designed and constructed an apnea detector for infant monitoring in a clinical environment. The device uses a breath processor module with a surface ECG for detecting apnea. When the infant's breathing counts and heart rates are abnormal, an alarm will sound. This device has shown good performance and feasibility.
婴儿猝死综合症(SIDS)是婴儿死亡的常见原因。众所周知,呼吸暂停与小岛屿发展中国家发病率增加有关。呼吸停止超过15秒,或伴有缺氧或心动过缓,被称为早产呼吸暂停,超过50%的早产儿都有这种情况。我们设计并制造了一种用于临床环境中婴儿监测的呼吸暂停检测器。该设备使用带有表面ECG的呼吸处理器模块来检测呼吸暂停。当婴儿的呼吸计数和心率异常时,警报就会响起。该装置具有良好的性能和可行性。
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引用次数: 5
Measurement and parameter characterization of pseudo-resistor based CCIA for biomedical applications 生物医学应用中基于伪电阻的CCIA测量与参数表征
Chih-Chan Tu, Tsung-Hsien Lin
This paper performs the detailed analysis and measurement of a pseudo-resistor based CCIA used for bio-potential signal acquisition. The pseudo-resistor is implemented with MOS transistors operating in deep sub-threshold region, whose characteristic is not well-modeled in simulation. The resistor value versus control voltage and the effect of leakage current at OPAMP input node are discussed and characterized in this paper. The tested chip consumes 1.3μA from a 1-V supply, and the total integrated noise from 0.5 to 100 Hz is 3.26μVrms. It achieves a noise efficiency factor of 14.6.
本文对一种用于生物电位信号采集的基于伪电阻器的CCIA进行了详细的分析和测量。伪电阻器是用工作在深亚阈值区域的MOS晶体管实现的,其特性在仿真中没有得到很好的模拟。本文讨论并表征了OPAMP输入节点的电阻值与控制电压的关系以及漏电流的影响。测试芯片在1v电源下的功耗为1.3μA, 0.5 ~ 100hz的总集成噪声为3.26μVrms。它的噪声效率系数为14.6。
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引用次数: 9
X-ray image enhancement using a modified anisotropic diffusion 使用改进的各向异性扩散的x射线图像增强
L. Septiana, Kang-Ping Lin
This study presents a novel X-ray image enhancement method. The method proposed in this study is an improved method from Perona-Malik anisotropic diffusion to enhance the quality of X-ray image. This improvement is implemented by combining histogram equalization, Perona-Malik anisotropic diffusion, and a weighted K-means clustering. The result from the real X-ray image shows that the proposed algorithm can improve the image quality of the original low dose x-ray image and make it become more reliable.
本文提出了一种新的x射线图像增强方法。本文提出的方法是对Perona-Malik各向异性扩散方法的改进,以提高x射线图像的质量。这种改进是通过结合直方图均衡化、Perona-Malik各向异性扩散和加权k均值聚类来实现的。实际x射线图像的结果表明,该算法可以提高原始低剂量x射线图像的图像质量,使其变得更加可靠。
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引用次数: 10
期刊
2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014)
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