1. Michael A. Choma

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    1. Mentioned In 36 Articles

    2. Opto-Mechanical Engineer at Oculus

      Opto-Mechanical Engineer at Oculus
      We are looking for an Opto-Mechanical Engineer to join our Brain-Computer Interface (BCI) team in Menlo Park, CA. In this role, you would work closely with researchers as part of a multi-disciplinary systems engineering team (e.g. mechanical, electrical, optical, and software) to design, build, test, and maintain novel wearable neural interface technologies. Our research is focused on developing functional brain-computer interface (BCI) technologies for use in consumer electronic products ...
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      Mentions: Michael A. Choma
    3. Optical Engineering Opening at Oculus

      Optical Engineering Opening at Oculus
      We are looking for an Optical Engineer to join our Brain-Computer Interface (BCI) team in Menlo Park, CA. In this role, you will be responsible for building optical systems, including light sources, sensors, waveguides, and related technology building blocks to enable next generation architectures for novel neural interface technologies. Our research is focused on developing functional brain-computer interface (BCI) technologies for use in consumer electronic products. Our team collaborates extensively ...
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      Mentions: Michael A. Choma
    4. Optical coherence tomography and autofluorescence microscopy of respiratory ciliated epithelia

      Optical coherence tomography and autofluorescence microscopy of respiratory ciliated epithelia
      Efficient mucociliary clearance is necessary to protect the respiratory tract from infection. Mucociliary dysfunction is common in respiratory diseases including asthma, chronic obstructive pulmonary disease, and cystic fibrosis. Rescuing mucociliary clearance by stimulating the metabolism of respiratory ciliated epithelia could offer new treatments for respiratory diseases. However, the coupling between cellular metabolism and mechanical output in respiratory ciliated epithelia is poorly understood. We propose to study this coupling with autofluorescence ...
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    5. Visualization and quantification of injury to the ciliated epithelium using quantitative flow imaging and speckle variance optical coherence tomography

      Visualization and quantification of injury to the ciliated epithelium using quantitative flow imaging and speckle variance optical coherence tomography
      Mucociliary flow is an important defense mechanism in the lung to remove inhaled pathogens and pollutants. Disruption of ciliary flow can lead to respiratory infections. Multiple factors, from drugs to disease can cause an alteration in ciliary flow. However, less attention has been given to injury of the ciliated epithelium. In this study, we show how optical coherence tomography (OCT) can be used to investigate injury to the ciliated epithelium ...
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    6. Ex vivo visualization of human ciliated epithelium and quantitative analysis of induced flow dynamics by using optical coherence tomography

      Ex vivo visualization of human ciliated epithelium and quantitative analysis of induced flow dynamics by using optical coherence tomography
      Background and Objective Cilia-driven mucociliary clearance is an important self-defense mechanism of great clinical importance in pulmonary research. Conventional light microscopy possesses the capability to visualize individual cilia and its beating pattern but lacks the throughput to assess the global ciliary activities and flow dynamics. Optical coherence tomography (OCT), which provides depth-resolved cross-sectional images, was recently introduced to this area. Materials and Methods Fourteen de-identified human tracheobronchial tissues are directly ...
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    7. Analysis of Craniocardiac Malformations in Xenopus using Optical Coherence Tomography : Scientific Reports

      Analysis of Craniocardiac Malformations in Xenopus using Optical Coherence Tomography : Scientific Reports
      Birth defects affect 3% of children in the United States. Among the birth defects, congenital heart disease and craniofacial malformations are major causes of mortality and morbidity. Unfortunately, the genetic mechanisms underlying craniocardiac malformations remain largely uncharacterized. To address this, human genomic studies are identifying sequence variations in patients, resulting in numerous candidate genes. However, the molecular mechanisms of pathogenesis for most candidate genes are unknown. Therefore, there is a ...
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    8. Yale University Receives NIH Grant for Quantitative Optical Imaging of Cilia-Driven Fluid Flow

      Yale University Receives NIH Grant for Quantitative Optical Imaging of Cilia-Driven Fluid Flow
      Yale University Receives a 2016 NIH Grant for $416,250 for Quantitative Optical Imaging of Cilia-Driven Fluid Flow. The principal investigator is Michael Choma. The program began in 2013 and ends in 2018. Below is a summary of the proposed work. Respiratory diseases are major causes of pediatric morbidity and mortality. These diseases are incompletely understood, which is a barrier to improving clinical care. Therefore, new mechanisms of disease need ...
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    9. Improved velocimetry in optical coherence tomography using Bayesian analysis

      Improved velocimetry in optical coherence tomography using Bayesian analysis
      OCT is a popular cross-sectional microscale imaging modality in medicine and biology. While structural imaging using OCT is a mature technology in many respects, flow and motion estimation using OCT remains an intense area of research. In particular, there is keen interest in maximizing information extraction from the complex-valued OCT signal. Here, we introduce a Bayesian framework into the data workflow in OCT-based velocimetry. We demonstrate that using prior information ...
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    10. Three-dimensional, three-vector-component velocimetry of cilia-driven fluid flow using correlation-based approaches in optical coherence tomography

      Three-dimensional, three-vector-component velocimetry of cilia-driven fluid flow using correlation-based approaches in optical coherence tomography
      Microscale quantification of cilia-driven fluid flow is an emerging area in medical physiology, including pulmonary and central nervous system physiology. Cilia-driven fluid flow is most completely described by a three-dimensional, three-component (3D3C) vector field. Here, we generate 3D3C velocimetry measurements by synthesizing higher dimensional data from lower dimensional measurements obtained using two separate optical coherence tomography (OCT)-based approaches: digital particle image velocimetry (DPIV) and dynamic light scattering (DLS)-OCT ...
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    11. Quantifying hyperoxia-mediated damage to mammalian respiratory cilia-driven fluid flow using particle tracking velocimetry optical coherence tomography

      Quantifying hyperoxia-mediated damage to mammalian respiratory cilia-driven fluid flow using particle tracking velocimetry optical coherence tomography
      Oxygen supplementation [hyperoxia, increased fraction of inspired oxygen ( FiO 2 )] is an indispensable treatment in the intensive care unit for patients in respiratory failure. Like other treatments or drugs, hyperoxia has a risk-benefit profile that guides its clinical use. While hyperoxia is known to damage respiratory epithelium, it is unknown if damage can result in impaired capacity to generate cilia-driven fluid flow. Here, we demonstrate that quantifying cilia-driven fluid flow ...
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    12. Post-doctoral Research Fellowship at Yale in Cardiovascular Molecular and Translational Imaging

      Post-doctoral Research Fellowship at Yale in Cardiovascular Molecular and Translational Imaging
      Post-doctoral research fellowship immediately available at Yale on NIH funded T32 training grant focused on providing multi-disciplinary multi-modality training in molecular and translational cardiovascular imaging for highly qualified fellows holding either a MD or/and PhD, in preparation for academic careers as independent investigators in the highly clinically relevant field of cardiovascular imaging. Post-doctoral fellowship training will be 2-3 years in duration. There are three primary research focuses in the ...
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    13. Low-spatial-coherence broadband fiber source for speckle free imaging

      Low-spatial-coherence broadband fiber source for speckle free imaging
      We designed and demonstrate a fiber-based amplified spontaneous emission (ASE) source with low spatial coherence, low temporal coherence, and high power per mode. ASE is produced by optically pumping a large gain core multimode fiber while minimizing optical feedback to avoid lasing. The fiber ASE source provides 270 mW of continuous wave emission, centered at =1055 nm with a full-width half-maximum bandwidth of 74 nm. The emission is distributed among ...
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      Mentions: Michael A. Choma
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  2. About Michael A. Choma

    Michael A. Choma

    Michael A. Choma is a Biomedical Optical Scientist at Facebook.

  3. Quotes

    1. We know from other disease where the flow of mucus is impaired, we know that really reduces survival of patients.
      In Researchers at Yale Work to Improve Health of Premature Babies