Now showing items 1-14 of 14

    • A versatile diffractive maskless lithography for single-shot and serial microfabrication. 

      Jenness, Nathan J; Hill, Ryan T; Hucknall, Angus; Chilkoti, Ashutosh; Clark, Robert L (Opt Express, 2010-05-24)
      We demonstrate a diffractive maskless lithographic system that is capable of rapidly performing both serial and single-shot micropatterning. Utilizing the diffractive properties of phase holograms displayed on a spatial ...
    • Are component positioning and prosthesis size associated with hip resurfacing failure? 

      Marker, David R; Zywiel, Michael G; Johnson, Aaron J; Seyler, Thorsten M; Mont, Michael A (BMC Musculoskelet Disord, 2010-10-02)
      BACKGROUND: Recent studies suggest that there is a learning curve for metal-on-metal hip resurfacing. The purpose of this study was to assess whether implant positioning changed with surgeon experience and whether positioning ...
    • Circuit topology and control principle for a first magnetic stimulator with fully controllable waveform. 

      Goetz, SM; Pfaeffl, M; Huber, J; Singer, M; Marquardt, R; Weyh, T (Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2012-01)
      Magnetic stimulation pulse sources are very inflexible high-power devices. The incorporated circuit topology is usually limited to a single pulse type. However, experimental and theoretical work shows that more freedom in ...
    • Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room. 

      Lee, Sung-Woo; Jin, Jian-Yue; Guan, Huaiqun; Martin, Flavious; Kim, Jae Ho; Yin, Fang-Fang (Journal of applied clinical medical physics, 2008-01-13)
      INTRODUCTION:Although flat-panel based X-ray imaging has been well tested in diagnostic radiology, its use as an image-guided-radiotherapy (IGRT) system in a treatment room is new and requires systematic assessment. MATERIALS ...
    • Coded aperture compressive temporal imaging. 

      Llull, Patrick; Liao, Xuejun; Yuan, Xin; Yang, Jianbo; Kittle, David; Carin, Lawrence; Sapiro, Guillermo; ... (8 authors) (Opt Express, 2013-05-06)
      We use mechanical translation of a coded aperture for code division multiple access compression of video. We discuss the compressed video's temporal resolution and present experimental results for reconstructions of > 10 ...
    • Delivery efficiency of an Elekta linac under gated operation. 

      Cui, Guoqiang; Housley, David J; Chen, Fan; Mehta, Vivek K; Shepard, David M (Journal of applied clinical medical physics, 2014-09-08)
      In this study, we have characterized the efficiency of an Elekta linac in the delivery of gated radiotherapy. We have explored techniques to reduce the beam-on delay and to improve the delivery efficiency, and have investigated ...
    • Design and in vivo evaluation of more efficient and selective deep brain stimulation electrodes. 

      Howell, Bryan; Huynh, Brian; Grill, Warren M (Journal of neural engineering, 2015-08)
      <h4>Objective</h4>Deep brain stimulation (DBS) is an effective treatment for movement disorders and a promising therapy for treating epilepsy and psychiatric disorders. Despite its clinical success, the efficiency and selectivity ...
    • Flattening filter-free accelerators: a report from the AAPM Therapy Emerging Technology Assessment Work Group. 

      Xiao, Ying; Kry, Stephen F; Popple, Richard; Yorke, Ellen; Papanikolaou, Niko; Stathakis, Sotirios; Xia, Ping; ... (11 authors) (Journal of applied clinical medical physics, 2015-05-08)
      This report describes the current state of flattening filter-free (FFF) radiotherapy beams implemented on conventional linear accelerators, and is aimed primarily at practicing medical physicists. The Therapy Emerging Technology ...
    • High-fidelity, broadband stimulated-Brillouin-scattering-based slow light using fast noise modulation. 

      Zhu, Yunhui; Lee, Myungjun; Neifeld, Mark A; Gauthier, Daniel J (Opt Express, 2011-01-17)
      We demonstrate a 5-GHz-broadband tunable slow-light device based on stimulated Brillouin scattering in a standard highly-nonlinear optical fiber pumped by a noise-current-modulated laser beam. The noisemodulation waveform ...
    • In situ synthesis of DNA microarray on functionalized cyclic olefin copolymer substrate. 

      Saaem, I; Ma, K; Marchi, A; LaBean, T; Tian, J (ACS Appl Mater Interfaces, 2010-02)
      Thermoplastic materials such as cyclic-olefin copolymers (COC) provide a versatile and cost-effective alternative to the traditional glass or silicon substrate for rapid prototyping and industrial scale fabrication ...
    • Instrument independent diffuse reflectance spectroscopy. 

      Yu, Bing; Fu, Henry L; Ramanujam, Nirmala (J Biomed Opt, 2011-01)
      Diffuse reflectance spectroscopy with a fiber optic probe is a powerful tool for quantitative tissue characterization and disease diagnosis. Significant systematic errors can arise in the measured reflectance spectra and ...
    • Intracellular Neural Recording with Pure Carbon Nanotube Probes. 

      Yoon, Inho; Hamaguchi, Kosuke; Borzenets, Ivan V; Finkelstein, Gleb; Mooney, Richard; Donald, Bruce R (PloS one, 2013-01)
      The computational complexity of the brain depends in part on a neuron's capacity to integrate electrochemical information from vast numbers of synaptic inputs. The measurements of synaptic activity that are crucial ...
    • Parallel on-axis holographic phase microscopy of biological cells and unicellular microorganism dynamics. 

      Ehlers, MD; Newpher, Thomas Mark; Shaked, NT; Wax, A (Appl Opt, 2010-05-20)
      We apply a wide-field quantitative phase microscopy technique based on parallel two-step phase-shifting on-axis interferometry to visualize live biological cells and microorganism dynamics. The parallel on-axis holographic ...
    • Slow light with a swept-frequency source. 

      Zhang, Rui; Zhu, Yunhui; Wang, Jing; Gauthier, Daniel J (Opt Express, 2010-12-20)
      ct: We introduce a new concept for stimulated-Brillouin-scattering-based slow light in optical fibers that is applicable for broadly-tunable frequency-swept sources. It allows slow light to be achieved, in principle, over ...