1. Articles from Wenjun Liao

    1-2 of 2
    1. In vitro remodeling and structural characterization of degradable polymer scaffold-based tissue-engineered vascular grafts using optical coherence tomography

      In vitro remodeling and structural characterization of degradable polymer scaffold-based tissue-engineered vascular grafts using optical coherence tomography

      Non-destructive imaging strategies to monitor long-term cultures is essential for vascular engineering. The goal of this study is to investigate whether optical coherence tomography (OCT) can be a suitable approach to monitor the long-term remodeling process of biodegradable polymeric scaffold-based tissue-engineered vascular grafts (TEVG) after pulsatile stimulation and to observe polymeric scaffold degradation during bioreactor cultivation. In the present study, a perfusion system driven by a ventricular assist device was provided for a three-dimensional culture system as a pulsatile force. We characterized the structural features of wall thickness and polyglycolic acid degradation based on optical signal attenuation using catheter-based OCT ...

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    2. A Tip-Tilt-Piston Micromirror With Symmetrical Lateral-Shift-Free Piezoelectric Actuators

      A Tip-Tilt-Piston Micromirror With Symmetrical Lateral-Shift-Free Piezoelectric Actuators

      In this paper, we present the design, fabrication, and characterization of a high-fill-factor tip-tilt-piston micromirror actuated by four symmetrical lateral-shift-free (LSF) piezoelectric actuators. Lead zirconate titanate (PZT) is the piezoelectric material deposited using a sol-gel process. The micromirror can operate in both piston and rotation modes. At the piston mode, the measured resonant frequency is 990 Hz. An 18.3-μm piston displacement is obtained by applying 5 Vdc to four symmetrical LSF (SLSF) actuators. For the rotation mode, the measured resonant frequency is 1650 Hz and an optical deflection angle of 4.2° is measured by applying 5 Vdc ...

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    1-2 of 2
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  2. Topics in the News

    1. (1 articles) University of Florida
    2. (1 articles) Huikai K. Xie
    3. (1 articles) Jikei University School of Medicine
    4. (1 articles) Macquarie University
    5. (1 articles) Medical University of Vienna
    6. (1 articles) University of Florence
    7. (1 articles) National Institutes of Health
    8. (1 articles) Beth Israel Deaconess Medical Center
    9. (1 articles) Giacomo Savini
    10. (1 articles) Bernhard Baumann
    11. (1 articles) Antonia Lichtenegger
    12. (1 articles) Movu
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