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You searched on: Author: Jeeseong Hwang

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1. Numerical, benchtop, and in vivo phantoms for hyperspectral imaging of ischemic wounds
Published: 5/14/2015
Authors: David W Allen, Jeeseong Hwang, Maritoni Abatayo Litorja, Joseph Paul Rice
Abstract: Biomedical optical imaging has the potential to achieve high spatial resolution and high functional sensitivity for non-invasive assessment of ischemic wounds. However, clinical acceptance of many optical imaging devices is hampered by poor repro ...

2. Quantitative scheme for full-field polarization rotating fluorescence microscopy (PROM) using a liquid crystal variable retarder
Published: 5/14/2015
Authors: John F. Lesoine, Ji Y. Lee, Hyeong Gon Kang, Matthew Lawrence Clarke, Robert C. Chang, Ralph Nossal, Jeeseong Hwang
Abstract: We introduce real-time, full-field, polarization rotating fluorescence microscopy (PROM) to monitor the absorption dipole orientations of fluorescent molecules. A quarter-wave plate, in combination with a liquid crystal variable retarder (LCVR ...

3. Dimensional Metrology of Lab on a Chip Internal Structures: a Comparison of Optical Coherence Tomography with Coherence Fluorescence Microscopy
Published: 4/8/2015
Authors: Darwin R Reyes-Hernandez, Michael W Halter, Jeeseong Hwang
Abstract: The characterization of internal structures in a polymeric device, specifically of a final product, will require a different set of metrology techniques than those traditionally use in the characterization of microelectronic devices. OCT is relative ...

4. Inward cholesterol gradient of the membrane system installed by malaria parasites in normal and sickle erythrocytes
Published: 5/29/2014
Authors: Fuyuki Tokumasu, Georgeta Crivat, Hans Ackerman, Jeeseong Hwang, Thomas E. Wellems
Abstract: Plasmodium falciparum (Pf) infection remodels the human erythrocyte with new membrane systems, including a modified host erythrocyte membrane (EM), a parasitophorous vacuole membrane (PVM), a tubulovesicular network (TVN), and Maurer's clefts (MC ...

5. Single molecule confocal fluorescence lifetime correlation spectroscopy for accurate nanoparticle size determination
Published: 5/15/2014
Authors: Bonghwan B. Chon, Kimberly A Briggman, Jeeseong Hwang
Abstract: We report on an experimental procedure in confocal single molecule fluorescence lifetime correlation spectroscopy (FLCS) to determine the range of excitation power and molecule concentration in solution under which the application of an unmodified ...

6. Optical Coherence Tomography for Dimensional Metrology of Lab-on-a-chip devices
Published: 10/27/2013
Authors: Darwin R Reyes-Hernandez, Michael W Halter, Jeeseong Hwang
Abstract: Here we present a new metrology tool for the determination of the dimensions of channels from final product Lab-on-a-chip devices. Using Optical Coherence Tomography (OCT) areas of up to 12 mm x 12 mm can be imaged in less than 1 second, without the ...

7. Metrology for Lab-on-a-Chip Final-Product Devices
Published: 5/12/2013
Authors: Darwin R Reyes-Hernandez, Michael W Halter, Jeeseong Hwang
Abstract: New metrology tools to measure the critical parameters of internal structures in lab on a chip devices are greatly needed in order to develop standard tests for this technology. Here we present a method that combines a custom made optical coherence ...

8. Fabrication and Characterization of a Multilayered Optical Tissue Model with Embedded Scattering Microspheres in Polymeric Materials
Published: 5/9/2012
Authors: Robert C. Chang, Peter M. Johnson, Christopher M Stafford, Jeeseong Hwang
Abstract: We report on a novel fabrication approach to build multilayered optical tissue phantoms that serve as independently validated test targets for axial resolution and contrast in scattering measurements by depth-resolving optical coherent tomography (OC ...

9. Hyperspectral Image Projector Applications
Published: 2/15/2012
Authors: Joseph Paul Rice, Steven W Brown, David W Allen, Howard W Yoon, Maritoni Abatayo Litorja, Jeeseong Hwang
Abstract: For the past several years NIST has been developing, along with several collaborators, a Hyperspectral Image Projector (HIP). This scene projector produces high-resolution programmable spectra and projects them into dynamic two-dimensional images ...

10. Tetracysteine-Based Fluorescent Tags to Study Protein Localization and Trafficking in Plasmodium falciparum-Infected Erythrocytes
Published: 8/10/2011
Authors: Georgeta Crivat, Fuyuki Tokumasu, Juliana Martha Sa , Thomas E. Wellems, Jeeseong Hwang
Abstract: Plasmodium falciparum (Pf) malaria parasites remodel host erythrocytes by placing membranous structures in the host cell cytoplasm and inserting proteins into the surrounding erythrocyte membranes. Dynamic imaging techniques with high spatial and tem ...

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