Multiple energy computed tomography with monochromatic x rays from the NSLS

Conference · Tue Dec 31 04:00:00 EST 1991

OSTI ID:10119451

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: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10119451
• Report Number(s): BNL--47081; CONF-911106--77; ON: DE92007607
• Country of Publication: United States
• Language: English

Related Subjects

550602
62 RADIOLOGY AND NUCLEAR MEDICINE
BRAIN
COMPUTERIZED TOMOGRAPHY
EXTERNAL RADIATION IN DIAGNOSTICS
IMAGES
MONOCHROMATIC RADIATION
NSLS
PHANTOMS
X RADIATION