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Carbon Nanospheres: Tunable Luminescent Carbon Nanospheres with Well-Defined Nanoscale Chemistry for Synchronized Imaging and Therapy (Small 36/2015)

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Small 2015年第36期11卷

作者： Prabuddha Mukherjee Santosh K. Misra Mark C. Gryka Huei-Huei Chang Saumya Tiwari William L. Wilson John W. Scott Rohit Bhargava Dipanjan Pan Department of Bioengineering University of Illinois at Urbana-Champaign 1304 W. Springfield Ave. Urbana IL 61801 USA Department of Chemistry University of Illinois at Urbana-Champaign 600 S. Mathews Ave. Urbana IL 61801 USA Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana IL 61801 USA Illinois Sustainability Technology Center University of Illinois at Urbana-Champaign Urbana IL 61801 USA Electrical and Computer Engineering Chemical and Biomolecular Engineering Chemistry and Mechanical Science and Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 1304 W. Springfield Ave. Urbana IL 61801 USA Carle Foundation Hospital 502 N. Busey St. Urbana IL 61801 USA Departments of Bioengineering and Materials Science and Engineering 502 N. Busey St. Urbana IL 61801 USA Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana IL 61801 USA

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Vector beams and vector fields: A look at methods of generation and potential applications

Vector beams and vector fields: A look at methods of generat...

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Frontiers in Optics, FIO 2013

作者： Toussaint, Kimani C. University of Illinois Urbana-Champaign IL 61820 United States Department of Mechanical Science and Engineering University of Illinois Urbana-Champaign IL 61820 United States Affiliate in the departments of Electrical and Computer Engineering and Bioengineering University of Illinois Urbana-Champaign IL 61820 United States

Potential applications of vector fields and beams, each of which is characterized by a spatially dependent polarization distribution, will be discussed. Various methods of generating such fields will also be presented... 详细信息

ISBN: (纸本)9781557529879

关键词： Diffraction limit Electric fields Optical fields Spatial light modulators Stimulated emission depletion microscopy Vector beams Instrumentation, measurement, and metrology (120.0120) Polarization (260.5430)

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SEGMENTATION AND CORRELATION OF OPTICAL COHERENCE TOMOGRAPHY AND X-RAY IMAGES FOR BREAST CANCER DIAGNOSTICS

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Journal of Innovative Optical Health Sciences 2013年第2期6卷 71-81页

作者： JONATHAN G.SUN STEVEN G.ADIE ERIC J.CHANEY STEPHEN A.BOPPART Beckman Institute for Advanced Science and Technology 405 North Mathews Avenue UrbanaIllinois 61801USA Department of Bioengineering Beckman Institute for Advanced Science and Technology 405 North Mathews Avenue UrbanaIllinois 61801USA Departments of Electrical and Computer Engineering and Internal Medicine University of Illinois at Urbana-Champaign UrbanaIllinoisUSA

Pre-operative X ray mammography and int raoperative X-ray specimen radiography are routinely used to identify breast cancer *** advances in optical coherence tomography(OCT)have enabled its 1use for the intraoperative assessment of surgical margins during breast cancer *** each modality offers distinct contrast of normal and pathological features,there is an essential need to correlate image based features between the two modalities to take adv antage of the diagnostic capabilities of each *** compare OCT to X-ray images of resected human breast tissue and correlate different tissue features between modalities for future use in real-tine intraoperative OCT imaging.X ray imaging(specimen radiography)is currently used during surgical breast cancer procedures to verify tumor margins,but cannot image tissue in *** has the potential to solve this problem by providing intrao-perative imaging of the resected specimen as well as the in situ tumor *** and micro-CT(X-ray)images are automatically segmented using different computational approaches,and quantitatively compared to determine the ability of these algorithms to automat ically differentiate regions of adipose tissue from ***,two-dimensional(2D)and three-dimensional(3D)results are *** correlations,combined with real-time intraoperative OCT,have the potential to identify possible regions of tumor within breast tissue which correlate to tumor regions identified previously on X-ray imaging(mammography or specimen radiography).

关键词： Optical imaging mammography specimen radiography segmentation breast cancer intraoperative imaging

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EyePhone: A mobile EOG-based Human-computer Interface for assistive healthcare

EyePhone: A mobile EOG-based Human-Computer Interface for as...

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International IEEE/EMBS Conference on Neural engineering, CNE

作者： Erik English Alfredo Hung Evan Kesten David Latulipe Zhanpeng Jin Department of Electrical and Computer Engineering State University of New York Binghamton NY USA Binghamton University Binghamton NY US Departments of Electrical and Computer Engineering and Bioengineering State University of New York Binghamton NY USA

Human-computer Interfaces (HCI) allow effective interactions between human being and computers, which is of particular significance to people with disabilities or temporary mobility impairment. In this paper, we propose the EyePhone framework, a mobile HCI that allows users to control mobile phones through intentional eye or facial movements. A proof-of-concept prototype is developed based on a wearable electroencephalograph (EEG) headset and an Android smartphone. Specifically, a graphical window can receive and display continuous EEG data acquired from the headset; a mouse emulator can allow users to move a cursor around the smartphone screen by moving their heads and eyes; and an emergency dialer can allow users to make an emergency phone call through a certain pattern of eye/facial movements. The launching and switching of each functional module are also implemented through predefined head movement patterns, in order to achieve a true “hands-free” environment. The efficacy and efficiency of the proposed EyePhone system is evaluated based on experiments in a variety of scenarios (e.g., sitting, standing, and walking).

关键词： Electroencephalography Headphones Human computer interaction Mobile handsets Mobile communication Prototypes Electrodes

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Current-driven homogenization and effective medium parameters for finite samples

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Physical Review B 2013年第12期88卷 125131-125131页

作者： Vadim A. Markel Igor Tsukerman Departments of Radiology and Bioengineering and the Graduate Group in Applied Mathematics and Computational Science University of Pennsylvania Philadelphia Pennsylvania 19104 USA Department of Electrical and Computer Engineering The University of Akron Ohio 44325-3904 USA

Reflection and refraction of electromagnetic waves by artificial periodic composites (metamaterials) can be accurately modeled by an effective medium theory only if the boundary of the medium is explicitly taken into account and the two effective parameters of the medium (the index of refraction and the impedance) are correctly determined. Theories that consider infinite periodic composites do not satisfy the above condition. As a result, they can not model reflection and transmission by finite samples with the desired accuracy and are not useful for design of metamaterial-based devices. As an instructive case in point, we consider the “current-driven” homogenization theory, which has recently gained popularity. We apply this theory to the case of one-dimensional periodic medium wherein both exact and homogenization results can be obtained analytically in closed form. We show that, beyond the well-understood zero-cell limit, the current-driven homogenization result is inconsistent with the exact reflection and transmission characteristics of the slab.

关键词： ELECTROMAGNETISM MAGNETIC fields METAMATERIALS MAGNETOELECTRIC effect REFRACTION (Optics)

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Low frequency EC-GMR detection of cracks at ferromagnetic fastener sites in thick layered structure

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AIP Conference Proceedings 2013年第1期1511卷 480-487页

作者： G. Yang A. Tamburrino Z. Zeng Y. Deng X, Liu L. Udpa S. S. Udpa Department of Electrical & Computer Engineering Michigan State University East Lansing Michigan 48824 USA Department of Electrical & Computer Engineering Michigan State University East Lansing Michigan 48824 and Department of Electrical and Information Engineering University of Cassino and Lazio Meridionale Cassino 03043 Italy Department of Aeronautics Xiamen University Xiamen Fujian 361005 China Departments of Electrical Engineering Bioengineering and Radiology University of Colorado Denver Denver CO 80217 USA

The detection of embedded cracks under fastener heads (CUF) in multilayer structures is a major challenge facing the aviation industry. Eddy current (EC) based techniques, such as Magneto-Optic Imager, Sliding probe and Self-nulling EC probes, and low frequency EC methods have been investigated. The prior work of authors presented an EC system using a uniform field excitation combined with giant magnetoresistive (GMR) sensors for imaging the normal component of magnetic flux density, has improved the effectiveness in detecting 2nd and 3rd layer CUFs with aluminum fasteners. However, detection of CUFs with ferromagnetic fasteners remains a major challenge. This paper presents the experimental study of automatic crack detection under steel fastener sites using low frequency EC with 3D GMR sensors that measure all 3 components of the induced magnetic flux density. A finite element model based study is used to optimize the system design and the experimental validation is presented.

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Introduction to the issue on biophotonics

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IEEE Journal on Selected Topics in Quantum Electronics 2014年第2期20卷 4-7页

作者： Ilev, Ilko K. Boppart, Stephen A. Andersson-Engels, Stefan Kim, Beop-Min Perelman, Lev Tuchin, Valery Center for Devices and Radiological Health U.S. Food and Drug Administration Silver Spring MD 20993 United States Beckman Institute for Advanced Science and Technology Departments of Bioengineering Electrical and Computer Engineering and Medicine University of Illinois Urbana IL 61801 United States Division of Atomic Physics Lund University Lund SE-22100 Sweden Department of Biomedical Engineering Korea University Seoul 136-703 Korea Republic of Center for Advanced Biomedical Imaging and Photonics Beth Israel Deaconess Medical Center Harvard University Boston MA 02215 United States Division of Optics and Biophotonics Saratov State University Saratov 410012 Russia Institute of Precision Mechanics and Control Russian Academy of Sciences Saratov 410028 Russia Optoelectronics and Measurement Techniques Laboratory University of Oulu Oulu FI-90014 Finland

The objective of this JSTQE Issue on Biophotonics is to highlight recent progress and trends in innovative biophotonics technology development. The papers published in this issue cover a broad range of advanced biophotonics areas summarized in the following sections: 1) bioimaging: optical coherence tomography and microscopy, nonlinear optical imaging, and novel multimodality imaging approaches; 2) biosensing: multifunctional biosensing, and novel biosensing approaches; 3) biophotonic science: mechanisms of light-cell and lighttissue interactions, advanced modeling methods in biophotonics, and light induced biophotonics effects; 4) biophotonic technology: advanced technologies in biophotonic diagnostics and therapeutics, infrared technology in biophotonics, and novel laser, biomedical and fiber optics tools and devices in biophotonics. These key research topics are highlighted as comprehensive overviews of the current status and future trends, as well as original results and recent developments in the field of biophotonics. This issue contains 33 papers, including 18 invited and 15 contributed papers authored by well-established research groups and promising scientists from all over the world. The invited papers include extended reviews on recent biophotonic developments and clinical applications in the areas of highresolution multispectral bioimaging, combined multifunctional microscopy, nonlinear deep tissue imaging, single molecule imaging, optical coherence elastography, cellular and molecular mechanisms of photobiomodulation, tissue optical clearing, clinical ultrafast laser surgery, infrared laser nerve stimulation, and novel tapered diode lasers for biophotonics. The contributed papers cover a broad variety of key biophotonic research areas including recently obtained original results on multimodal bioimaging and sensing, high resolution phase-sensitive magnetomotive optical coherence microscopy and elastography, and laser-assisted typing of polymorphic human

关键词： Special issues and sections Biophotonics

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A wearable real-time BCI system based on mobile cloud computing

A wearable real-time BCI system based on mobile cloud comput...

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International IEEE/EMBS Conference on Neural engineering, CNE

作者： Maria V. Ruiz Blondet Adarsha Badarinath Chetan Khanna Zhanpeng Jin Binghamton University Binghamton NY US Department of Computer Science State University of New York Binghamton NY USA Departments of Electrical and Computer Engineering and Bioengineering State University of New York Binghamton NY USA

Pervasive and wearable brain-computer interface (BCI) systems show great potential for effectively understanding human mental activities and intentions in their daily life. In this paper, we propose a real-time BCI system based on mobile devices and cloud computing to detect and recognize the user's mental states. A proof-of-concept prototype is developed based on a wearable, commercially available EEG headset, an Android smartphone, and a multi-core computing server. We demonstrate an integrated Android app containing three built-in functional modules. Specifically, a graphical window can receive and display continuous EEG data acquired from the headset in a real-time manner; a facial expression interface can indicate the user's mental states according to the analysis of EEG data on the server; and a retrospective analysis tool to investigate the mental behaviors over a long period of time.

关键词： Electroencephalography Servers Headphones Mobile communication Mobile handsets Real-time systems Humanoid robots

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85 dB Dynamic Range 1.2 mW 156 kS/s Biopotential Recording IC for High-Density ECoG Flexible Active Electrode Array

85 dB Dynamic Range 1.2 mW 156 kS/s Biopotential Recording I...

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European Solid-State Circuits Conference

作者： Sohmyung Ha Jongkil Park Yu M. Chi Jonathan Viventi John Rogers Gert Cauwenberghs Departments of Bioengineering and Electrical and Computer Engineering Cognionics Inc. Department of Electrical and Computer Engineering Polytechnic Institute of New York University Department of Materials Science and Engineering University of Illinois at Urbana-Champaign

ISBN: (纸本)9781479906420

We present the design, implementation, and experimental characterization of a low-noise low-power biopotential recording integrated circuit (IC) in support of a fully implantable, high-density, actively multiplexed and flexible 32×32 electrode array for electrocorticography (ECoG) neural recording. Each ECoG recording IC contains an 8-channel ADC, each serving one column and multiplexing up to 32 rows in the external ECoG array. Each column ADC converts signal coarsely by 10-bit successive approximation (SA), and performs fine conversion of the residue by 7-bit 1st order incremental delta-sigma (ΔΣ) conversion. One bit of overlap between SA and ΔΣ stages supports wide dynamic range with an instantaneous core range of 3.9 mV, sufficiently larger than typical ECoG signals, while handling electrochemical and process variations in the ECoG electrode array up to ±1 V. Tests show a measured dynamic range of 85 dB and CMRR of 87 dB at 19.5 kS/s and at 19.4 μA from 3.3 V per ADC channel. The 8-channel IC occupies 18 mm~2 in 0.6 μm 2P3M CMOS.

关键词： Electrocorticography electrode configuration Integrated circuits Dynamic range MULTIPLEXOR common mode rejection ratio wide dynamic range dubnium decibel

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Three-dimensional fourier-transform second-harmonic generation microscopy for quantification of collagen fiber organization in biological tissues

Three-dimensional fourier-transform second-harmonic generati...

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Frontiers in Optics, FIO 2012

作者： Lau, Tung-Yuen Ambekar, Raghu Toussaint, Kimani C. United States Department of Mechanical Science and Engineering United States Department of Electrical and Computer Engineering United States Departments of Electrical and Computer Engineering and Bioengineering University of Illinois Urbana-Champaign IL 61820 United States

Fourier transform-second harmonic generation imaging has previously been shown to be useful in quantifying collagen fiber organization in 2D. Here, we generalize this approach to 3D and calculate preferred fiber orien... 详细信息

ISBN: (纸本)9781557529565

关键词： Harmonic generation

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