Dr. Soo-Chin Liew Profile

Dr. Soo-Chin Liew

Principal Research Scientist at National Univ of Singapore

SPIE Involvement:

Author

Publications (6)

SPIE Journal Paper | 31 May 2021

Dual-energy x-ray approach for object/energy-specific attenuation coefficient correction in single-photon emission computed tomography: effects of contrast agent

Kheng Lim Goh, Soo-Chin Liew

JMI, Vol. 8, Issue 05, 052106, (May 2021) https://doi.org/10.1117/12.10.1117/1.JMI.8.5.052106

KEYWORDS: Signal attenuation, Iodine, Single photon emission computed tomography, Heart, X-rays, X-ray computed tomography, X-ray imaging, Sensors, Computer simulations, X-ray sources

Read Abstract +

SPIE Journal Paper | 24 August 2020

Estimation of colored dissolved organic matter using Sentinel-2 data in the coastal waters of Singapore

Joel Wong, Soo Liew, Elizabeth W.-S. Wong, Sandric C. Leong

JARS, Vol. 14, Issue 03, 034512, (August 2020) https://doi.org/10.1117/12.10.1117/1.JRS.14.034512

KEYWORDS: Absorption, Data modeling, Multispectral imaging, Reflectivity, Algorithm development, Remote sensing, Water, Sensors, Ocean optics, In situ metrology

Read Abstract +

Proceedings Article | 11 June 2003 Paper

Image fusion of Hyperion and Ikonos imagery

Soo Chin Liew, Chew Wai Chang, Leong Kwoh

Proceedings Volume 4898, (2003) https://doi.org/10.1117/12.467826

KEYWORDS: Image fusion, Image resolution, Earth observing sensors, High resolution satellite images, Reflectivity, Spatial resolution, Hyperspectral imaging, Spectral resolution, Multispectral imaging, Image processing

Read Abstract +

Proceedings Article | 8 May 2003 Paper

Mapping optical parameters of coastal sea waters using the Hyperion imaging spectrometer

Soo Chin Liew, Leong Keong Kwoh

Proceedings Volume 4892, (2003) https://doi.org/10.1117/12.466828

KEYWORDS: Reflectivity, Absorption, Water, Atmospheric modeling, Ocean optics, Backscatter, Optical properties, Spectroscopy, Satellites, Scattering

Read Abstract +

Proceedings Article | 14 January 2002 Paper

Modeling the reflectance spectra of tropical coastal waters

Soo-Chin Liew, Aik Chia, Kim Lim, Leong Kwoh

Proceedings Volume 4488, (2002) https://doi.org/10.1117/12.452820

KEYWORDS: Reflectivity, Water, Absorption, Luminescence, Scattering, Reflection, Coastal modeling, Remote sensing, Backscatter, Atmospheric modeling

Read Abstract +

Proceedings Article | 1 July 1990 Paper

Description of a simultaneous emission-transmission CT system

Bruce Hasegawa, Eric Gingold, Susan Reilly, Soo-Chin Liew, Christopher Cann

Proceedings Volume 1231, (1990) https://doi.org/10.1117/12.18783

KEYWORDS: Sensors, X-rays, Imaging systems, X-ray imaging, X-ray computed tomography, Signal attenuation, Data acquisition, Germanium, Collimators, Single photon emission computed tomography

Read Abstract +

We are designing an instrument which will perform correlated emission-transmission image acquisition, but which departs from previous systems by incorporating a low-power x-ray tube and generator, rather than a radionuclide source, for the transmission image. The system uses an array of high-purity germanium (HPGe) detectors and detector electronics with energy discrimination circuitry to separate x-rays (at 100 or 120 kVp) from higher energy gamma rays from the 99mTc or 123j radiopharmaceutical injected into the patient. The data acquisition electronics have time constants matching the charge collection time (50 ns) of the HPGe detectors to maximize count-rate capabilities (up to 1 million cps per detector element), while maintaining adequate energy resolution (approximately 10% FWHM). Each detector channel has two energy windows for simultaneous transmission-emission imaging or for dual-energy x-ray studies. A host computer provides system control as well as data acquisition, data correction, tomographic image reconstruction, image display, and data analysis. As a radionuclide imaging system, this instrument will function as a single-slice SPECT scanner with high-count rate capabilities and excellent energy resolution for imaging short-lived radionuclides, improved photopeak discrimination and scatter rejection, and simultaneous imaging of multiple radionuclides. The system also will generate radiographic images in either a tomographic or projection scanning mode, while dual-energy x-ray CT will provide material specific imaging. However, the novel and potentially powerful capabilities of this instrument would derive from its inherent correlation of functional information from SPECT with precise anatomic information from CT or the material-specific morphologic information from dual-energy x-ray CT. The simultaneously acquired radiographic images should relieve the deficiencies of poor statistics and limited spatial resolution commonly associated with SPECT systems. Dual-energy xray CT also can provide an energy-corrected and anatomically-correlated map of attenuation coefficients for more accurate quantitation of emission radionuclide data.

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years