Multiple energy computed tomography with monochromatic x rays from the NSLS

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5818488

Dilmanian, F A; Nachaliel, E; Garrett, R F; Thomlinson, W C; Chapman, L D; Moulin, H R; Oversluizen, T; Rarback, H M; Rivers, M; Spanne, P ^[1]; Thompson, A C ^[2]; Zeman, H D ^[3]

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1. Brookhaven National Lab., Upton, NY (United States)
2. Lawrence Berkeley Lab., CA (United States)
3. Tennessee Univ., Memphis, TN (United States). Dept. of Biomedical Engineereing

We used monochromatic x rays from the X17 superconducting wiggler beamline at the National Synchrotron Light Source (NSLS), Brookhaven National Laboratory, for dual-energy quantitative computed tomography (CT) of a 27 mm-diameter phantom containing solutions of different KOH concentrations in cylindrical holes of 5-mm diameter. The CT configuration was a fixed horizontal fan-shaped beam of 1.5 mm height and 30 mm width, and a subject rotating around a vertical axis. The transmitted x rays were detected by a linear-array Si(Li) detector with 120 elements of 0.25 mm width each. We used a two-crystal Bragg-Bragg fixed-exit monochromator with Si<220> crystals. Dual photon absorptiometry (DPA) CT data were taken at 20 and 38 keV. The reconstructed phantom images show the potential of the system for quantitative CT.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5818488
• Report Number(s): BNL-47081; CONF-911106--77; ON: DE92007607
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCELERATORS
BODY
BRAIN
CENTRAL NERVOUS SYSTEM
COMPUTERIZED TOMOGRAPHY
CYCLIC ACCELERATORS
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
IMAGES
IONIZING RADIATIONS
MOCKUP
MONOCHROMATIC RADIATION
NERVOUS SYSTEM
NSLS
ORGANS
PHANTOMS
RADIATION SOURCES
RADIATIONS
STRUCTURAL MODELS
SYNCHROTRON RADIATION SOURCES
SYNCHROTRONS
TOMOGRAPHY
X RADIATION