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Search Publications by: Jeeseong C. Hwang (Fed)

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Displaying 26 - 50 of 171

Correction of an adding-doubling inversion algorithm for the measurement of the optical parameters of turbid media

January 1, 2018
Author(s)
Paul Lemaillet, Catherine C. Cooksey, Jeeseong Hwang, Heidrun Wabnitz, Dirk Grosenick, Lin Yang, David W. Allen
We present broadband measurements of the optical properties of tissue-mimicking solid phantoms using a single integrating sphere to measure the hemispherical reflectance and transmittance under a direct illumination at the normal incident angle. These

Broadband spectral measurements of diffuse optical properties by an integrating sphere instrument at the National Institute of Standards and Technology

March 30, 2017
Author(s)
Paul Lemaillet, Jeeseong Hwang, Heidrun Wabnitz, Dirk Grosenick, Lin Yang, David W. Allen
Diffuse materials that approximate the optical properties of human tissue are commonly used as phantoms. In order to use the phantoms in a manner that provides consistent results relative to independent measurements, the optical properties need to be tied

Label-free hyperspectral dark-field microscopy towards quantitative scatter imaging

March 27, 2017
Author(s)
Philip Cheney, David McClatchy III, Stephen Kanick, Paul Lemaillet, David W. Allen, Daniel Samarov, Brian Pogue, Jeeseong C. Hwang
A hyperspectral dark-field microscopy technique has been developed for imaging spatially distributed diffuse reflectance spectra from light-scattering samples. In this report, quantitative scatter spectroscopy was demonstrated with a uniform scattering

Polydimethylsiloxane tissue-mimicking phantoms for quantitative optical medical imaging standards

March 24, 2017
Author(s)
Jeeseong Hwang, Hyun J. Kim, Paul Lemaillet, Dirk Grosenick, Thomas Gladytz, David McClatchy III, Kimberly A. Briggman, Brian Pogue
We report on a procedure to build and characterize solid tissue-mimicking phantoms of polydimethylsiloxane (PDMS) polymers. Controlled inclusion of light scattering titanium dioxide (TiO2) nanoparticles enables the creation of phantoms having tunable light

Wide-field quantitative imaging of tissue microstructure using high-frequency structured light

June 9, 2016
Author(s)
David McClatchy III, Elizabeth Rizzo, wendy wells, Jeeseong C. Hwang, keith paulson, Brian Pogue, Stephen Kanick
Sub-diffusive structured light imaging has been shown to accurately and quantitatively map the reduced scattering coefficient and the phase function backscatter parameter in a wide-field geometry. This study shows the first the experimental imaging of

National Institute of Standards and Technology measurement service of the optical properties of biomedical phantoms: Current status

March 24, 2016
Author(s)
Paul Lemaillet, Catherine C. Cooksey, Zachary H. Levine, Adam L. Pintar, Jeeseong Hwang, David W. Allen
The National Institute for Standards and Technology (NIST) has maintained scales of reflectance and transmittance over several decades. Those scales are primarily intended for the regular transmittance, mirrors, and solid surface scattering diffusers. The

Double-integrating-sphere system at the National Institute of Standards and Technology in support of measurement standards for the determination of optical properties of tissue-mimicking phantoms

October 27, 2015
Author(s)
Paul Lemaillet, Jeeseong C. Hwang, David W. Allen
There is a need for a common reference point that will allow for the comparison of the optical properties of tissue mimicking phantoms. This paper provides a brief review of the methods that have been used to measure tissue mimicking phantoms. The review

Digital Phantoms Generated by Spectral and Spatial Light Modulators

October 21, 2015
Author(s)
Bonghwan Chon, Fuyuki Tokumasu, Ji Y. Lee, David W. Allen, Joseph P. Rice, Jeeseong Hwang
A hyperspectral image projector (HIP) based on liquid crystal on silicon (LCoS) spatial light modulators (SLMs) is explained and demonstrated to generate 3D spectral data cubes. The HIP- constructed data cubes are 3D images of the spatial distribution of

Quantitative scheme for full-field polarization rotating fluorescence microscopy (PROM) using a liquid crystal variable retarder

May 14, 2015
Author(s)
John F. Lesoine, Ji Y. Lee, Hyeong G. Kang, Matthew L. Clarke, Robert C. Chang, Ralph Nossal, Jeeseong C. Hwang
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), provides a

Making digital phantoms with spectral and spatial light modulators for quantitative applications of hyperspectral optical medical imaging devices

March 6, 2015
Author(s)
Bonghwan Chon, fuyuki Tokumasu, Ji Youn Lee, David W. Allen, Joseph P. Rice, Jeeseong C. Hwang
We present a procedure to generate digital phantoms with a hyperspectral image projector (HIP) consisting of two liquid crystal on silicon (LCoS) spatial light modulators (SLMs). The digital phantoms are 3D image data cubes of the spatial distribution of