Chih-Wen Chuang, E. Go Chua, Yu-Sheng Lai, W. Fang
{"title":"RF-powered Li-ion battery charger for biomedical applications","authors":"Chih-Wen Chuang, E. Go Chua, Yu-Sheng Lai, W. Fang","doi":"10.1109/LISSA.2009.4906742","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906742","url":null,"abstract":"An integrated RF-powered Li-ion battery charger solution has been developed for biomedical applications. RF energy received through an antenna is rectified, regulated, and passed on to a battery charger circuit that charges a Li-ion battery efficiently and accurately. The charger system has been implemented using UMC 90nm BiCMOS process library. Experimental results show that a battery model with internal resistance of 300mΩ and internal capacitance of 10mF can be charged to its full capacity at 3.5V in 0.2ms by a 2mW 10MHz RF power source referred from the antenna. The implemented charger circuit consumes only 240 uW.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121003840","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}
{"title":"A VLSI-inspired image reconstruction algorithm for continuous-wave diffuse optical tomography systems","authors":"Y. Hsu, Chih-Chung Fu, W. Fang, T. Sang","doi":"10.1109/LISSA.2009.4906716","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906716","url":null,"abstract":"In recent years, there has been an increasing interest in diffuse optical tomography (DOT). The image accuracy and computational complexity are greatly affected by the reconstruction algorithm. This paper aims at providing an efficient reconstruction technique which can be implemented in VLSI for advanced portable devices. Various inhomogeneous absorption models are used in simulations of continuous-wave DOT systems. The accuracy and time consumption are calculated and compared for both frame and sub-frame modes. Mean square errors (MSE) are derived to quantify the accuracy of different modes. Decreasing the complexity of algorithm and enhancing the quality of image can be achieved by adjusting the truncated parameter and reconstructive mode. This study has shown that the sub-frame mode with truncated Jacobi Singular Value Decomposition (TJSVD) algorithm is the method with higher efficiency and better quality. It can also be implemented in VLSI for continuous-wave DOT.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114743828","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}
Benjamin R. Geheb, M. M. Grafton, J. Jang, L. Reece, J. Leary, Jong-Kee Kwon, B. Jung
{"title":"Low-noise wide dynamic range readout circuit for multi-stage microfluidic cell sorting systems","authors":"Benjamin R. Geheb, M. M. Grafton, J. Jang, L. Reece, J. Leary, Jong-Kee Kwon, B. Jung","doi":"10.1109/LISSA.2009.4906704","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906704","url":null,"abstract":"The proposed sensor interface minimizes the optical detection system size while maximizing its overall efficiency (both power and sensitivity) of a multi-stage microfluidic cell sorter system. The proposed ΣΔ sensor interface achieves at least one order of magnitude higher sensitivity while consuming less power (2mW) as compared to the traditional operational amplifier based transimpedance amplifier sensor interface. The proposed ΣΔ sensor interface will be used to complete a full implementation of the developed multi-stage microfluidic system that would prove to be a great advancement in microfluidic cell sorting technology.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132405104","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}
Christopher Rohde, C. Gilleland, C. Samara, M. Yanik
{"title":"On-chip whole-animal manipulation for high-throughput subcellular-resolution in-vivo drug/genetic screening","authors":"Christopher Rohde, C. Gilleland, C. Samara, M. Yanik","doi":"10.1109/LISSA.2009.4906707","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906707","url":null,"abstract":"Techniques for rapid and automated small-animal manipulation and immobilization are necessary for high-throughput in vivo genetic/drug screens using cellular and sub-cellular features in multicellular organisms. We present a suite of technologies for complex high-throughput whole-animal genetic and drug screens. We demonstrate a high-speed microfluidic sorter that can isolate and immobilize Caenorhabditis elegans in a well-defined geometry, an integrated chip containing individually addressable screening chambers for incubation and exposure of individual animals to biochemical compounds, and a device for delivery of compound libraries in standard multiwell plates to microfluidic devices. The immobilization stability obtained by these devices is comparable to that of chemical anesthesia and the immobilization process does not affect lifespan, progeny production, or other aspects of animal health. The high-stability enables the use of a variety of key optical techniques. We use this to demonstrate femtosecond-laser nanosurgery and three-dimensional multiphoton microscopy to study neural regeneration at sub-cellular resolution in vivo.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124315878","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}
{"title":"Advances in integrated polarization image sensors","authors":"V. Gruev, J. van der Spiegel, N. Engheta","doi":"10.1109/LISSA.2009.4906710","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906710","url":null,"abstract":"An overview of the latest efforts in integrated polarization imaging sensors are presented. We describe two approaches for creating focal plane polarization imaging sensors. The first approach combines polymer polarization filters with CMOS active pixel sensor and computes polarization information at the focal plane. The second approach outlines our initial work on polarization filters using aluminum nano wires. Measurements from the first polarization image sensor prototype are discussed in detail and applications for material detection using polarization techniques are described.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132438669","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}
{"title":"Detecting molecules using a surface impedance imaging technique","authors":"K. Foley, X. Shan, Yuyuan Tian","doi":"10.1109/LISSA.2009.4906733","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906733","url":null,"abstract":"We demonstrate here a surface impedance imaging technique based on the local surface charge density influencing the surface plasmon resonance (SPR) measurement. Three images are captured of the entire surface: a DC steady-state image, an AC intensity image and an AC phase image. The DC image gives the standard SPR information on thickness. The AC intensity and phase images display information related to the surface impedance. This allows for the surface charge modulation created by the electrochemical potential modulation to be imaged optically.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"128 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120915845","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}
{"title":"Modeling a fixed-fixed beam nano biosensor using equivalent electrical circuit technique","authors":"R. Bajpai, M. Zaghloul","doi":"10.1109/LISSA.2009.4906709","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906709","url":null,"abstract":"A fixed-fixed beam nano structure has been presented and it has been shown that it can be used as a mass sensor. Successful operation of this device in liquid can be used to make a bio-sensor useful for life sciences. In this paper an equivalent circuit for the device has been proposed with the percentage error in frequency and bandwidth response found to be 2.3% and 18.3% respectively. Similar steps can be used to develop an equivalent circuit of the device in liquid. Existing techniques for the quality factor improvement can be applied to obtain a nano scale sensor for mass detection in liquid. With further processing such a device can be used as a biosensor. Development of an equivalent circuit will enable the analysis of the device by using conventional circuit simulation softwares hence simplifying the study of the nano biosensor.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671257","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}
V. Mantena, Wenjuan Jiang, Jiang Li, Rick McKenzie
{"title":"Prostate cancer biomarker identification using MALDI-MS DATA: Initial results","authors":"V. Mantena, Wenjuan Jiang, Jiang Li, Rick McKenzie","doi":"10.1109/LISSA.2009.4906723","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906723","url":null,"abstract":"We present a computational framework to identify prostate specific cancer biomarkers using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) tissue imaging data collected at the Eastern Virginia Medical School (EVMS). Protein profiles of a tumor and its surrounding area from one prostate tissue sample were analyzed. The data contain 974 spectra (27 cancer, 947 normal).We proposed a pipeline to configure our previously developed feature selection and classification algorithms for biomarker identification. We also compared our algorithms with other popular computational models. Our feature selection algorithm identified three peaks (proteins) which obtained high sensitivities and specificities in a five-fold cross validation experiment.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117060630","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}
Zhanpeng Jin, Joseph Oresko, Shimeng Huang, A. Cheng
{"title":"HeartToGo: A Personalized medicine technology for cardiovascular disease prevention and detection","authors":"Zhanpeng Jin, Joseph Oresko, Shimeng Huang, A. Cheng","doi":"10.1109/LISSA.2009.4906714","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906714","url":null,"abstract":"To date, cardiovascular disease (CVD) is the first leading cause of global death. The Electrocardiogram (ECG) is the most widely adopted clinical tool that measures and records the electrical activity of the heart from the body surface. The mainstream resting ECG machines for CVD diagnosis and supervision can be ineffective in detecting abnormal transient heart activities, which may not occur during an individual's hospital visit. Common Holter-based portable solutions offer 24-hour ECG recording, containing hundreds of thousands of heart beats that not only are tedious and time-consuming to analyze manually but also miss the capability to provide any real-time feedback. In this study, we seek to establish a cell phone-based personalized medicine technology for CVD, capable of performing continuous monitoring and recording of ECG in real time, generating individualized cardiac health summary report in layman's language, automatically detecting abnormal CVD conditions and classifying them at any place and anytime. Specifically, we propose to develop an artificial neural network (ANN)-based machine learning technique, combining both individualized medical information and clinical ECG database data, to train the cell phone to learn to adapt to its user's physiological conditions to achieve better ECG feature extraction and more accurate CVD classification results.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123689610","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}
{"title":"Ligand-functionalized gold nanorods as theragnostic agents","authors":"A. Wei, Ji‐Xin Cheng","doi":"10.1109/LISSA.2009.4906697","DOIUrl":"https://doi.org/10.1109/LISSA.2009.4906697","url":null,"abstract":"Plasmon-resonant gold nanorods have been examined as multifunctional agents for imaging and photoactivated therapies. Au nanorods can be imaged with single-particle sensitivity by two-photon luminescence (TPL) when excited by pulsed NIR laser irradiation, and have been detected in vivo while passing through blood vessels at subpicomolar concentrations. TPL imaging can also be used to characterize the targeted delivery of ligand-functionalized nanorods to tumor cells. Nanorods were coated with oligoethyleneglycol (OEG) units using in situ dithiocarbamate formation, a novel and robust method of surface functionalization. Nanorods coated with OEG were shielded from nonspecific cell uptake, whereas those functionalized with folate-terminated OEG chains accumulated on the surface of tumor cells expressing their cognate receptor. Cells labeled with folate-conjugated nanorods can mediate photothermal effects when irradiated at NIR wavelengths, often resulting in a dramatic blebbing of the cell membrane, which was determined to be caused indirectly by the influx of extracellular Ca2+ following perforation of the cell membrane. With respect to preclinical testing, a protocol has been developed for the exhaustive removal of CTAB, a cytotoxic surfactant used in nanorod synthesis. Treatment with polystyrenesulfonate can yield “CTAB-free” nanorods with negligible toxicity.","PeriodicalId":285171,"journal":{"name":"2009 IEEE/NIH Life Science Systems and Applications Workshop","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125983430","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}