B.S. in Biological Sciences, 1976, University of California, Irvine
B.A. in Chemistry, 1977, University of California, Irvine
M.S. in Radiological Sciences, 1981, University of California, Irvine
Ph.D. in Radiological Sciences, 1983, University of California, Irvine
AFFILIATION
School of Medicine
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RESEARCH INTEREST
Theoretical/experimental analysis and implementation of digital detector for medical image acquisition and display, with ongoing research in the following areas; photostimulable phosphor computed radiography systems, including the development of passive and active dual-energy acquisition schemes for the decomposition of the integrated projection image into "bone-only" and "soft-tissue only" images; determination of image processing methods to reduce or eliminate the effects of x-ray scatter in 2D projection radiography; implementation of digital subtraction angiography quantitative flow software for eventual clinical applications; development of quantitative methodologies for bone mineral analysis using computed radiography and screen-film imaging detectors; design and fabrication of digital detectors for mammography using CMOS imaging cameras and fiberoptic scintillators; analysis of spectral energy effects on image contrast and breast dose in mammography; helical CT data acquisition and image processing; Picture Archiving and Communications Systems (PACS) development.
RESEARCH FACILITY
The Radiology Research laboratory contains several x-ray imaging devices, including a dedicated digital angiographic II/TV system for basic physics measurements and physiological/anatomical animal experimentation, and a constant potential computer-controlled x-ray generator interfaced to several x-ray tubes for acquisition of micro-CT images, dual-energy image research, and general imaging physics measurements, among others. A laser film digitizer is available to convert analog film images (e.g. clinical mammograms) to digital representations. A separate imaging laboratory contains a dedicated mammography imaging unit for research and design of mammography detectors. Several Pentium-class computers are used for image acquisition, manipulation, display, and equipment interface. A research and development lab for the development of a microPACS imaging network is adjacent to the mammography laboratory in the research area. Also available is an ultrasound research laboratory area housing a dedicated state-of-the-art ultrasound system, with real-time scanning, Doppler, color Doppler and power Doppler capabilities.
HOSPITAL FACILITIES
For clinical oriented projects and after-hours research, time is available (with special permission) on all hospital based imaging equipment, including general radiographic units, fluroscopy systems, digital angiography, computed tomography, and MRI scanners.
C. K. Abbey and H. H. Barrett, 2001, "Human and model-observer performance in ramp-spectrum noise: Effects of regularization and object variability." Journal of the Optical Society of America A. 18(3): 473-488.
MAJOR RESEARCH INTERESTS
His current research interests include development of a dual-energy radiographic technique using photostimulable phosphors and “active” detector technology, digital x-ray detector analysis with a specific focus on computed radiography and mammography imaging systems, and assistance in the development of a dedicated breast CT scanner for screening asymptomatic patients with the principal investigator, Dr. John M. Boone, Ph.D.
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